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All questions of Life Processes for Class 10 Exam
Which part of alimentary canal receives bile from the liver ?- a)Stomach
- b)Small intestine
- c)Large intestine
- d)Oesophagus
Correct answer is option 'B'. Can you explain this answer?
Which part of alimentary canal receives bile from the liver ?
a)
Stomach
b)
Small intestine
c)
Large intestine
d)
Oesophagus
 | Ishan Choudhury answered |
The small intestine is made up of duodenum, jejunum, and ileum. It receives the bile from the liver which helps in the breakdown of fats.
The common step between aerobic and anaerobic respiration takes place in :- a)cytoplasm
- b)mitochondria
- c)chloroplast
- d)golgi complex
Correct answer is option 'A'. Can you explain this answer?
The common step between aerobic and anaerobic respiration takes place in :
a)
cytoplasm
b)
mitochondria
c)
chloroplast
d)
golgi complex
 | Raghav Bansal answered |
Aerobic respiration first occurs in the cytoplasm and then in mitochondria, whereas Anaerobic respiration occurs in the cytoplasm itself.
Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:- a)Lactic acid
- b)Carbon dioxide
- c)Hydrochloric acid
- d)Fat
Correct answer is option 'A'. Can you explain this answer?
Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:
a)
Lactic acid
b)
Carbon dioxide
c)
Hydrochloric acid
d)
Fat
 | Vikram Kapoor answered |
- During heavy exercise, the demand for energy is high but the supply of oxygen to produce energy is limited. Therefore, anaerobic respiration takes place in the muscle cells to fulfil the demand for energy.
- This anaerobic breakdown of glucose leads to the formation of lactic acid in muscles.
- The accumulation of lactic acid in muscles leads to muscle cramps.
Thus option A is correct.
The vein which brings clean blood from the lungs into the heart is known as:- a)Superior vena cava
- b)Hepatic vein
- c)Pulmonary vein
- d)Pulmonary artery
Correct answer is option 'C'. Can you explain this answer?
The vein which brings clean blood from the lungs into the heart is known as:
a)
Superior vena cava
b)
Hepatic vein
c)
Pulmonary vein
d)
Pulmonary artery
 | Arun Sharma answered |
The form of veins that transfer oxygenated blood from the lungs to the heart is the pulmonary veins. The four major pulmonary veins, two from each of the lungs that flow into the left atrium of the heart, are the largest pulmonary veins.
Movement of food through the oesophagus is due to :- a)Lubrication by saliva
- b)Alimentary Canal
- c)Diffusion
- d)Turgor pressure
Correct answer is option 'B'. Can you explain this answer?
Movement of food through the oesophagus is due to :
a)
Lubrication by saliva
b)
Alimentary Canal
c)
Diffusion
d)
Turgor pressure
| | Raghav Bansal answered |
2. Alimentary Canal
Explanation: The movement of food through the esophagus is primarily due to a process called peristalsis. Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract, including the esophagus, which is a part of the alimentary canal. While lubrication by saliva helps in swallowing, the actual movement of food down the esophagus is due to the coordinated contractions of the muscles in the walls of the alimentary canal.
Oxygen liberated during photosynthesis comes from- a)water
- b)chlorophyll
- c)carbon dioxide
- d)glucose
Correct answer is option 'A'. Can you explain this answer?
Oxygen liberated during photosynthesis comes from
a)
water
b)
chlorophyll
c)
carbon dioxide
d)
glucose
| | Arun Sharma answered |
Photosynthetic oxygen evolution occurs via the light-dependent oxidation of water. Free oxygen is generated as a by-product of this reaction and is released into the atmosphere.
Which is the first enzyme to mix with food in digestive tract ?- a)Pepsin
- b)Cellulose
- c)Amylase
- d)Trypsin
Correct answer is option 'C'. Can you explain this answer?
Which is the first enzyme to mix with food in digestive tract ?
a)
Pepsin
b)
Cellulose
c)
Amylase
d)
Trypsin
| | Amit Sharma answered |
Salivary amylase, present in saliva, is the first digestive enzyme that gets mixed with food in the oral cavity during the process of mastication and bolus formation. The digestive enzyme salivary amylase hydrolyzes starch into maltose, malto-triose, dextrin and a small amount of glucose.
The process in which loss of water takes place in the form of water vapour through stomata is called- a)transportation
- b)transpiration
- c)guttation
- d)translocation
Correct answer is option 'B'. Can you explain this answer?
The process in which loss of water takes place in the form of water vapour through stomata is called
a)
transportation
b)
transpiration
c)
guttation
d)
translocation
| | Amit Kumar answered |
Transpiration is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves.
Can you explain the answer of this question below:Haemoglobin is –
- A:
Vitamin
- B:
Skin pigment
- C:
Blood carrier
- D:
Respiratory pigment
The answer is D.
Haemoglobin is –
Vitamin
Skin pigment
Blood carrier
Respiratory pigment
 | Krishna Iyer answered |
the hemoglobin increases the oxygen carrying capacity of blood. In humans and most other vertebrates, the most common respiratory pigment is a protein called hemoglobin.
Extra cellular fluid in our tissues is also known as- a)plasma
- b)serum
- c)lymph
- d)albumin
Correct answer is option 'C'. Can you explain this answer?
Extra cellular fluid in our tissues is also known as
a)
plasma
b)
serum
c)
lymph
d)
albumin
| | Arun Sharma answered |
Extra cellular fluid is present in between cells of tissues and is also known as tissue fluid or lymph.
The part of the digestive system where no digestion takes place is- a)ileum
- b)stomach
- c)mouth
- d)oesophagus
Correct answer is option 'D'. Can you explain this answer?
The part of the digestive system where no digestion takes place is
a)
ileum
b)
stomach
c)
mouth
d)
oesophagus
| | Ananya Das answered |
Oesophagus
It is a muscular tube that moves the partially digested food from mouth to stomach for further digestion. Hence, the Oesophagus is one part of the digestive system where no digestion occurs.
Normal blood pressure (systolic/diastolic) is- a)120/80 mm of Hg
- b)160/80 mm of Hg
- c)120/60 mm of Hg
- d)180/80 mm of Hg
Correct answer is option 'A'. Can you explain this answer?
Normal blood pressure (systolic/diastolic) is
a)
120/80 mm of Hg
b)
160/80 mm of Hg
c)
120/60 mm of Hg
d)
180/80 mm of Hg
| | Amit Kumar answered |
A blood pressure reading has a top number (systolic) and bottom number (diastolic). Normal blood pressure is less than 120 over 80 (120/80).
Salivary amylase secreted by salivary glands is responsible for which event in mouth?- a)Break-down of protein in amino acid
- b)Break-down of fat in lipids
- c)Break-down of starch in sugar
- d)Both (b) and(c)
Correct answer is option 'C'. Can you explain this answer?
Salivary amylase secreted by salivary glands is responsible for which event in mouth?
a)
Break-down of protein in amino acid
b)
Break-down of fat in lipids
c)
Break-down of starch in sugar
d)
Both (b) and(c)
| | Aditi bajaj answered |
Salivary amylase converts starch into sugar. Proteins are digested by pepsin and trypsin while fats are digested by lipase.
In which part of human digestive tract common bile duct opens ?- a)Large intestine
- b)Duodenum
- c)Stomach
- d)Liver
Correct answer is option 'B'. Can you explain this answer?
In which part of human digestive tract common bile duct opens ?
a)
Large intestine
b)
Duodenum
c)
Stomach
d)
Liver
 | Prabhat mehta answered |
Duodenum is first part of small intestine where common bile duct opens.
The fermentation of glucose by yeast normally yields- a)alcohol, CO2 and 36 ATP
- b)CO2, H2O and 36 ATP
- c)alcohol, CO2 and 2ATP
- d)lactic acid, CO2 and 2 ATP
Correct answer is option 'C'. Can you explain this answer?
The fermentation of glucose by yeast normally yields
a)
alcohol, CO2 and 36 ATP
b)
CO2, H2O and 36 ATP
c)
alcohol, CO2 and 2ATP
d)
lactic acid, CO2 and 2 ATP
 | Pooja Shah answered |
Yeasts break glucose down and produce alcohol and carbon dioxide as their by-products. In yeast fermentation of different foods and beverages, only two parts of ATP is commonly released
The filtration units of kidneys are called- a)ureter
- b)urethra
- c)neurons
- d)nephrons
Correct answer is option 'D'. Can you explain this answer?
The filtration units of kidneys are called
a)
ureter
b)
urethra
c)
neurons
d)
nephrons
| | Aditya Shah answered |
Nephrons are the basic filtering units of a kidney each kidney poses a large number of nephrons approximately 1-1.5 million.
The main functions of a nephron are:
(i) Filtration
(ii) Ultrafiltration
(iii) Absorption
(iv) Reabsorption
(i) Filtration
(ii) Ultrafiltration
(iii) Absorption
(iv) Reabsorption
Can you explain the answer of this question below:The maximum affinity of haemoglobin is with –
- A:
Carbon monoxide
- B:
Carbondioxide
- C:
Oxygen
- D:
Ammonia
The answer is A.
The maximum affinity of haemoglobin is with –
Carbon monoxide
Carbondioxide
Oxygen
Ammonia
 | Naina Sharma answered |
Hemoglobin in humans has a very high affinity for carbon monoxide, forming carboxyhemoglobin which is a very bright red in color. Carbon monoxide is thus problematic for humans because it has affinity higher than that of oxygen.
Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:- a)Hydrochloric acid
- b)Fat
- c)Carbon dioxide
- d)Lactic acid
Correct answer is option 'D'. Can you explain this answer?
Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:
a)
Hydrochloric acid
b)
Fat
c)
Carbon dioxide
d)
Lactic acid
| | Avinash Patel answered |
The build-up of lactic acid in our muscles while running (less oxygen conditions) causes cramps.
When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of- a)oxygen
- b)carbon dioxide
- c)nitrogen
- d)water vapour
Correct answer is option 'B'. Can you explain this answer?
When air is blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of
a)
oxygen
b)
carbon dioxide
c)
nitrogen
d)
water vapour
| | Arun Sharma answered |
The air we exhale contains CO2. When carbon dioxide is passed through lime water or Ca(OH)2 then it form calcium carbonate which is white in colour.
The opening and closing of the stomatal pore depend upon:- a)Oxygen
- b)Temperature
- c)Water in guard cells.
- d)Concentration of CO2 in stomata.
Correct answer is option 'C'. Can you explain this answer?
The opening and closing of the stomatal pore depend upon:
a)
Oxygen
b)
Temperature
c)
Water in guard cells.
d)
Concentration of CO2 in stomata.
 | Parth Basu answered |
- When a pair of guard cells surrounding a stoma receives the signal to open the stomatal pore, it is filled with water, thus changing the cell's shape and opening the pore.
- When guard cells receive a signal to close the stoma, this initiates a loss of water and causes them to shrink and the pore closes.
Thus, option C is correct.
Which of the following protects inner lining of stomach from hydrochloric acid secreted by gastric glands ?- a)Pepsinogen
- b)Pepsin
- c)Bile juice
- d)Mucus
Correct answer is option 'D'. Can you explain this answer?
Which of the following protects inner lining of stomach from hydrochloric acid secreted by gastric glands ?
a)
Pepsinogen
b)
Pepsin
c)
Bile juice
d)
Mucus
| | Amit Kumar answered |
Mucus is secreted by cells of gastric gland which forms a slimy layer over inner wall of stomach.
Which of these is not a raw material for photosynthesis?- a) Carbon dioxide
- b)Water
- c)Oxygen
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
Which of these is not a raw material for photosynthesis?
a)
Carbon dioxide
b)
Water
c)
Oxygen
d)
None of these
| | Krishna Iyer answered |
organism prepare their own food with the help of simple inorganic materials like CO2,H2O in sunlight with the help of chlorophyll. Thus, it doesn’t involve oxygen in the process.
Oxygen in lungs ultimately reaches –- a)Alveoli
- b)Trachea
- c)Bronchus
- d)Bronchioles
Correct answer is option 'D'. Can you explain this answer?
Oxygen in lungs ultimately reaches –
a)
Alveoli
b)
Trachea
c)
Bronchus
d)
Bronchioles
 | Nk Classes answered |
The alveoli are the final branchings of the respiratory tree and act as the primary gas exchange units of the lung. Inhaled oxygen enters the lungs and reaches the alveoli.
A large quantity of one of the following is removed from our body by lungs:- a)CO2
- b)CO2 and H2O
- c)H2O only
- d)Ammonia
Correct answer is option 'A'. Can you explain this answer?
A large quantity of one of the following is removed from our body by lungs:
a)
CO2
b)
CO2 and H2O
c)
H2O only
d)
Ammonia
| | Amit Sharma answered |
CO2 will be pushed out from our lungs and it passes through our nose and while we exhale it comes out so CO2 is out.
Water lost by transpiration is?- a)Pure water
- b)Rich in dissolved salts
- c)Rich dissolved minerals
- d)None of the above
Correct answer is option 'A'. Can you explain this answer?
Water lost by transpiration is?
a)
Pure water
b)
Rich in dissolved salts
c)
Rich dissolved minerals
d)
None of the above
| | Avinash Patel answered |
Transpiration is the process by which plants lose water in the form of water vapor. Water vapor is almost entirely free of dissolved salts and solutes, so water lost through transpiration is essentially pure water.
Blood pressure is measured by an instrument called- a)barometer
- b)sphygmomanometer
- c)photometer
- d)manometer
Correct answer is option 'B'. Can you explain this answer?
Blood pressure is measured by an instrument called
a)
barometer
b)
sphygmomanometer
c)
photometer
d)
manometer
| | Krishna Iyer answered |
A sphygmomanometer is a device that measures blood pressure. It is composes of an inflatable rubber cuff, which is wrapped around the arm. When the cuff's pressure equals the arterial systolic pressure, blood begins to flow past the cuff, creating blood flow turbulence and audible sounds.
The narrowest and most numberous tubes of lungs are termed as –- a)Bronchus
- b)Bronchioles
- c)Alveoli
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
The narrowest and most numberous tubes of lungs are termed as –
a)
Bronchus
b)
Bronchioles
c)
Alveoli
d)
None of these
| | Vikas Kumar answered |
Bronchiole is a fine respiratory tube in the lungs of reptiles, birds and mammals. It is formed by the subdivision of a bronchus.
Plant can respire in :- a)Dark
- b)Light
- c)Both in light and dark
- d)Morning
Correct answer is option 'C'. Can you explain this answer?
Plant can respire in :
a)
Dark
b)
Light
c)
Both in light and dark
d)
Morning
| | Arun Sharma answered |
Respiration is constitutive process that occurs in all tissues. Unlike photosynthesis that can happen only in the presence of sunlight, respiration in plant occurs all time. So, the answer is - both light and dark.
Which of the following statement(s) is (are) true about respiration ?
(i) During exhalation, ribs move inwards and diaphragm is lowered.
(ii) Exchange of gases takes place in alveoli.
(iii) During inhalation, ribs move outwards and diaphragm is lowered.
(iv) Haemoglobin has greater affinity for carbon dioxide.- a)(i) and (ii)
- b)(ii) and (iii)
- c)(i) and (iv)
- d)(iii) and (iv)
Correct answer is option 'B'. Can you explain this answer?
Which of the following statement(s) is (are) true about respiration ?
(i) During exhalation, ribs move inwards and diaphragm is lowered.
(ii) Exchange of gases takes place in alveoli.
(iii) During inhalation, ribs move outwards and diaphragm is lowered.
(iv) Haemoglobin has greater affinity for carbon dioxide.
(i) During exhalation, ribs move inwards and diaphragm is lowered.
(ii) Exchange of gases takes place in alveoli.
(iii) During inhalation, ribs move outwards and diaphragm is lowered.
(iv) Haemoglobin has greater affinity for carbon dioxide.
a)
(i) and (ii)
b)
(ii) and (iii)
c)
(i) and (iv)
d)
(iii) and (iv)
| | Krishna Iyer answered |
During inhalation, diaphragm is lowered and ribs move outward resulting in increased volume of lungs so air rushes in. Exchange of gases occur in alveoli.
The given diagram is of human digestive human. Study the diagram and answer the questions.
The secretion that is released by label C is:- a)Bile
- b)Pepsin
- c)Saliva
- d)Gastric juice
Correct answer is option 'A'. Can you explain this answer?
The given diagram is of human digestive human. Study the diagram and answer the questions.
The secretion that is released by label C is:
a)
Bile
b)
Pepsin
c)
Saliva
d)
Gastric juice
 | Gaurav Kumar answered |
Label C represents liver. Liver secretes bile, which is stored in gallbladder.
In a closed circulatory system, blood is completely enclosed within- a)heart
- b)vessels
- c)skeleton
- d)sinuses
Correct answer is option 'B'. Can you explain this answer?
In a closed circulatory system, blood is completely enclosed within
a)
heart
b)
vessels
c)
skeleton
d)
sinuses
| | Pooja Shah answered |
The closed circulatory system is where the blood flows into specialized blood vessels such as arteries, veins, and capillaries. In the closed circulatory system, the blood never comes out in direct contact with the tissues. For example, human being, dogs, rat.
The transpiration organ in plant is- a)Epidermis
- b)Xylem
- c)Cortex
- d)Phloem
Correct answer is option 'A'. Can you explain this answer?
The transpiration organ in plant is
a)
Epidermis
b)
Xylem
c)
Cortex
d)
Phloem
| | Damini nambiar answered |
**Transpiration Organ in Plants:**
The correct answer to the question is option 'A' - Epidermis.
**Explanation:**
The transpiration organ in plants is the epidermis. The epidermis is the outermost layer of cells covering the leaves, stems, and roots of plants. It serves as a protective barrier against mechanical injury, pathogens, and excessive water loss. It also plays a crucial role in the process of transpiration.
**Transpiration:**
Transpiration is the process by which plants lose water in the form of water vapor through the stomata, which are tiny openings present on the epidermis of leaves and stems. It is an essential process for plants as it helps in the absorption and transport of water and nutrients, cooling the plant, and maintaining turgidity.
**Role of Epidermis in Transpiration:**
The epidermis of leaves and stems contains specialized cells called guard cells, which surround and control the opening and closing of the stomata. When the plant needs to release excess water vapor, the guard cells open the stomata, allowing water to evaporate from the leaf surface. This process is known as transpiration.
**Structure of Epidermis:**
The epidermis is made up of tightly packed cells with a waxy layer called the cuticle on the outer surface. The cuticle helps in reducing water loss by acting as a waterproof barrier. However, the majority of transpiration occurs through the stomata.
**Importance of Transpiration:**
Transpiration is essential for several reasons:
1. Water and nutrient absorption: Transpiration creates a continuous flow of water and nutrients from the roots to the leaves, allowing plants to receive the necessary resources for growth and development.
2. Cooling effect: Transpiration helps in cooling the plant by releasing water vapor, similar to how sweating cools our bodies.
3. Maintaining turgidity: Transpiration maintains turgidity in plant cells, preventing wilting and maintaining the overall health and structure of the plant.
In conclusion, the epidermis of plants serves as the transpiration organ because it contains the stomata, which are responsible for the release of water vapor during the process of transpiration.
The correct answer to the question is option 'A' - Epidermis.
**Explanation:**
The transpiration organ in plants is the epidermis. The epidermis is the outermost layer of cells covering the leaves, stems, and roots of plants. It serves as a protective barrier against mechanical injury, pathogens, and excessive water loss. It also plays a crucial role in the process of transpiration.
**Transpiration:**
Transpiration is the process by which plants lose water in the form of water vapor through the stomata, which are tiny openings present on the epidermis of leaves and stems. It is an essential process for plants as it helps in the absorption and transport of water and nutrients, cooling the plant, and maintaining turgidity.
**Role of Epidermis in Transpiration:**
The epidermis of leaves and stems contains specialized cells called guard cells, which surround and control the opening and closing of the stomata. When the plant needs to release excess water vapor, the guard cells open the stomata, allowing water to evaporate from the leaf surface. This process is known as transpiration.
**Structure of Epidermis:**
The epidermis is made up of tightly packed cells with a waxy layer called the cuticle on the outer surface. The cuticle helps in reducing water loss by acting as a waterproof barrier. However, the majority of transpiration occurs through the stomata.
**Importance of Transpiration:**
Transpiration is essential for several reasons:
1. Water and nutrient absorption: Transpiration creates a continuous flow of water and nutrients from the roots to the leaves, allowing plants to receive the necessary resources for growth and development.
2. Cooling effect: Transpiration helps in cooling the plant by releasing water vapor, similar to how sweating cools our bodies.
3. Maintaining turgidity: Transpiration maintains turgidity in plant cells, preventing wilting and maintaining the overall health and structure of the plant.
In conclusion, the epidermis of plants serves as the transpiration organ because it contains the stomata, which are responsible for the release of water vapor during the process of transpiration.
Doctors measure the blood pressure with the instrument known as__________.- a)Sphygmomanometer
- b)Stethoscope
- c)Thermometer
- d)Manometer
Correct answer is option 'A'. Can you explain this answer?
Doctors measure the blood pressure with the instrument known as__________.
a)
Sphygmomanometer
b)
Stethoscope
c)
Thermometer
d)
Manometer
| | Amit Kumar answered |
The sphygmomanometer is a device used by doctors to measure the blood pressure of the patient. It measures the systolic and diastolic brachial artery pressure.
Study the given flow chart and answer the questions.
The process X occurs in ________ and Y occurs in _________ part of the cell.- a)Mitochondria and cytoplasm respectively
- b)Cytoplasm and mitochondria respectively
- c)Both takes place in cytoplasm
- d)Both takes place in mitochondria
Correct answer is option 'B'. Can you explain this answer?
Study the given flow chart and answer the questions.
The process X occurs in ________ and Y occurs in _________ part of the cell.
a)
Mitochondria and cytoplasm respectively
b)
Cytoplasm and mitochondria respectively
c)
Both takes place in cytoplasm
d)
Both takes place in mitochondria
| | Avinash Patel answered |
Cytoplasm, mitochondria respectively.
Study the diagram of the human respiratory system and answer the questions.
Which of these statements is incorrect regarding human lungs?- a)It is the secondary organ for respiration.
- b)It is located on the two sides of heart.
- c)The membrane that encloses lungs is pleural membrane.
- d)The alveolar epithelium of lungs is nonciliated epithelium.
Correct answer is option 'A'. Can you explain this answer?
Study the diagram of the human respiratory system and answer the questions.
Which of these statements is incorrect regarding human lungs?
a)
It is the secondary organ for respiration.
b)
It is located on the two sides of heart.
c)
The membrane that encloses lungs is pleural membrane.
d)
The alveolar epithelium of lungs is nonciliated epithelium.
| | Krishna Iyer answered |
Incorrect Statement Regarding Human Lungs
- It is the secondary organ for respiration: This statement is incorrect. The lungs are actually the primary organs for respiration in the human body. They are responsible for the exchange of oxygen and carbon dioxide, which is essential for the survival of all cells in the body.
In respiration, air passes through- a)Pharynx → nasal cavity → larynx → trachea → bronchi → bronchioles
- b)Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles
- c)Larynx → nasal cavity → pharynx → trachea
- d)Larynx → pharynx → trachea → lungs
Correct answer is option 'B'. Can you explain this answer?
In respiration, air passes through
a)
Pharynx → nasal cavity → larynx → trachea → bronchi → bronchioles
b)
Nasal cavity → pharynx → larynx → trachea → bronchi → bronchioles
c)
Larynx → nasal cavity → pharynx → trachea
d)
Larynx → pharynx → trachea → lungs
| | Amit Sharma answered |
The respiratory route air passes through is: Nostrils → nasal cavity →Pharynx → Larynx →Trachea → Bronchi (with cartilaginous rings) →Bronchioles (without rings)
Lymph can be defined as- a)Blood minus corpuscles
- b)Blood minus plasma
- c)Blood minus WBC
- d)Blood minus RBC and platelets
Correct answer is option 'D'. Can you explain this answer?
Lymph can be defined as
a)
Blood minus corpuscles
b)
Blood minus plasma
c)
Blood minus WBC
d)
Blood minus RBC and platelets
| | Rohit Sharma answered |
- Lymph is a colorless fluid, containing specialized lymphocytes, which are responsible for the immune responses of the body.
- Lymph is also an important carrier for nutrients, hormones, etc. Fats are absorbed through lymph in the lacteals present in the intestinal villi. Lymph lacks RBCs and platelets.
- Lymph contains white blood cells. So option (d) is correct.
During systole of ventricle- a)Blood enters the heart
- b)Blood leaves the heart
- c)Blood leaves the ventricle
- d)Blood enters lungs
Correct answer is option 'C'. Can you explain this answer?
During systole of ventricle
a)
Blood enters the heart
b)
Blood leaves the heart
c)
Blood leaves the ventricle
d)
Blood enters lungs
 | Meera Rana answered |
During ventricular systole, blood from the left ventricle moves out to the systemic circulation. Deoxygenated blood from the right ventricle moves out into the pulmonary artery to reach the lungs.
From which part of the alimentary canal does chemical digestion begins?- a)Mouth
- b)Esophagus
- c)Stomach
- d)Gall bladder E Small intestine
Correct answer is option 'A'. Can you explain this answer?
From which part of the alimentary canal does chemical digestion begins?
a)
Mouth
b)
Esophagus
c)
Stomach
d)
Gall bladder E Small intestine
| | Meera Rana answered |
Chemical digestion involves enzymes. In the mouth, chemical digestion is initiated when the food comes in contact with saliva, which is secreted by salivary glands. It contains salivary amylase which begins the digestive process by breaking down starch and converting it into maltose. Chemical digestion then further continues in stomach and then finally in the small intestine.
Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?- a)Mucus
- b)Pepsin
- c)Trypsin
- d)Bile
Correct answer is option 'A'. Can you explain this answer?
Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
a)
Mucus
b)
Pepsin
c)
Trypsin
d)
Bile
| | Ishan Choudhury answered |
Mucus is a viscous secretion that protects the inner lining of the stomach from the action of HCl.
A biochemical compound that readily combines with oxygen and distributes it throughout the human body is- a)water
- b)urea
- c)haemoglobin
- d)acetylcholine
Correct answer is option 'C'. Can you explain this answer?
A biochemical compound that readily combines with oxygen and distributes it throughout the human body is
a)
water
b)
urea
c)
haemoglobin
d)
acetylcholine
| | Amit Kumar answered |
Haemoglobin (Hb)
Hb found in Red Blood Cells (RBCs) combines with Dioxygen (O2) to form Oxyhaemoglobin, which is transported throughout the body by Blood. A Hb molecule can hold 4 oxygen molecules. When this complex comes to its destination (any cell), it is broken into former forms of Hb and Dioxygen.
Hb found in Red Blood Cells (RBCs) combines with Dioxygen (O2) to form Oxyhaemoglobin, which is transported throughout the body by Blood. A Hb molecule can hold 4 oxygen molecules. When this complex comes to its destination (any cell), it is broken into former forms of Hb and Dioxygen.
First step in photosynthesis is- a)release of O2 and absorption of CO2
- b)breakdown of water
- c)formation of Glucose
- d)absorption of light energy by chlorophyll
Correct answer is option 'D'. Can you explain this answer?
First step in photosynthesis is
a)
release of O2 and absorption of CO2
b)
breakdown of water
c)
formation of Glucose
d)
absorption of light energy by chlorophyll
 | Ayush Choudhary answered |
Photosynthesis takes place in the green leaves of plants and other green parts of plants like stem etc. The most active photosynthetic tissue in higher plants is the mesophyll of leaves. Mesophyll cells have many chloroplasts, which contain the specialized light-absorbing green pigments, the chlorophylls. When chlorophyll absorbs light, it gets excited and emits electrons. These chlorophylls are found in photosynthetic units called Photosystem I and Photosystem II. Each unit has a specific reaction centre which contains pigment molecules. These molecules absorb light of different wavelengths and emit electrons. Due to the photon of light, electrons of chlorophyll get excited. These electrons are picked up by an electron acceptor which passes them to an electron transport system of cytochromes. The excitement of electrons of chlorophyll b photon of light is the first step of photosynthesis.
Which part of the plant helps to absorb water and minerals from the soil?- a)Root hairs
- b)Roots
- c)Root cap
- d)Tap root
Correct answer is option 'A'. Can you explain this answer?
Which part of the plant helps to absorb water and minerals from the soil?
a)
Root hairs
b)
Roots
c)
Root cap
d)
Tap root
| | Ananya Das answered |
The root has further extensions which increase the surface area for absorption. These extensions are called root hair, which is present in all types of roots.
Which of the following statements is not correct?- a)Deoxygenated blood is poured into right atrium of heart
- b)The excretory units of flatworms are flame cells
- c)Human kidney has about 1 million nephridia
- d)Tracheids and vessels are non -living conducting tissues
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements is not correct?
a)
Deoxygenated blood is poured into right atrium of heart
b)
The excretory units of flatworms are flame cells
c)
Human kidney has about 1 million nephridia
d)
Tracheids and vessels are non -living conducting tissues
| | Arun Sharma answered |
Kidney doesn't have any nephridia but have 1 million nephron .The functional unit of kidney is nephron.
What is the primary function of the counter-current mechanism in the nephron?- a)To filter blood at the glomerulus
- b)To reabsorb glucose in the proximal tubule
- c)To concentrate urine by creating a concentration gradient in the medulla
- d)To transport urine from the kidney to the bladder
Correct answer is option 'C'. Can you explain this answer?
a)
To filter blood at the glomerulus
b)
To reabsorb glucose in the proximal tubule
c)
To concentrate urine by creating a concentration gradient in the medulla
d)
To transport urine from the kidney to the bladder
| | Nk Classes answered |
The counter-current mechanism in the nephron primarily functions to concentrate urine by creating a concentration gradient in the medulla of the kidney. This gradient is established by the counter-current flow of fluids in the ascending and descending limbs of the loop of Henle, which facilitates the reabsorption of water and concentrates the urine.
The heart is covered by- a)Epicardium
- b)Pericardium
- c)Supracardium
- d)Endocardium
Correct answer is option 'B'. Can you explain this answer?
The heart is covered by
a)
Epicardium
b)
Pericardium
c)
Supracardium
d)
Endocardium
| | Avinash Patel answered |
The heart is covered by pericardium. It is a fluid-filled sac It protects the heart. It is made up of an outer fibrous layer and inner serous membrane. Beneath pericardium, epicardium is present. It is the outer layer of muscle covering the external surfaces of the heart. Endocardium is the inner layer of the heart.
Read the following and answer any four question.
Heterotrophic nutrition is a mode of nutrition in which organisms obtain readymade organic food from outside sources. The organisms that depend upon outside sources for obtaining organic nutrients are called heterotrophs. Heterotrophic nutrition is of three types: saprophytic, parasitic and holozoic nutrition.
Q. Heterotrophic nutrition involves- a)production of simple sugar from inorganic compounds.
- b)utilisation of energy obtained by plants.
- c)utilisation of chemical energy to prepare food.
- d)none of these.
Correct answer is option 'D'. Can you explain this answer?
Read the following and answer any four question.
Heterotrophic nutrition is a mode of nutrition in which organisms obtain readymade organic food from outside sources. The organisms that depend upon outside sources for obtaining organic nutrients are called heterotrophs. Heterotrophic nutrition is of three types: saprophytic, parasitic and holozoic nutrition.
Q. Heterotrophic nutrition involves
Heterotrophic nutrition is a mode of nutrition in which organisms obtain readymade organic food from outside sources. The organisms that depend upon outside sources for obtaining organic nutrients are called heterotrophs. Heterotrophic nutrition is of three types: saprophytic, parasitic and holozoic nutrition.
Q. Heterotrophic nutrition involves
a)
production of simple sugar from inorganic compounds.
b)
utilisation of energy obtained by plants.
c)
utilisation of chemical energy to prepare food.
d)
none of these.
 | EduRev Class 10 answered |
Heterotrophic nutrition is a mode of nutrition in which organisms depend upon other organisms for food to survive. Heterotrophic organisms have to take in all the organic substances they need to survive. All animals, certain types of fungi, and non-photosynthesizing plants are heterotrophic.
In our body during the process of respiration exchange of gases takes place in- a)lungs and throat
- b)alveoli and throat
- c)alveoli of lungs
- d)larynx and lungs
Correct answer is option 'C'. Can you explain this answer?
In our body during the process of respiration exchange of gases takes place in
a)
lungs and throat
b)
alveoli and throat
c)
alveoli of lungs
d)
larynx and lungs
| | Ananya Das answered |
Exchange of gases takes place in alveolus of lungs as they are richly supplied with blood capillaries.
Choose the correct answer from the alternatives given: The respiratory centre, which regulates respiration in humans is located in ______________.- a)Cerebral peduncle
- b)Cerebellum
- c)Vagus nerve
- d)Medulla oblongata
Correct answer is option 'D'. Can you explain this answer?
Choose the correct answer from the alternatives given: The respiratory centre, which regulates respiration in humans is located in ______________.
a)
Cerebral peduncle
b)
Cerebellum
c)
Vagus nerve
d)
Medulla oblongata
| | Aditya Shah answered |
The medulla oblongata is the primary respiratory control center. Its main function is to send signals to the muscles that control respiration to cause breathing to occur. There are two regions in the medulla that control respiration: The ventral respiratory group stimulates expiratory movements.
The enzymes contained in pancreatic juices help in the digestion of:- a)Fats and carbohydrates
- b)Proteins and fats
- c)Proteins and carbohydrates
- d)Proteins, fats, and carbohydrates
Correct answer is option 'D'. Can you explain this answer?
The enzymes contained in pancreatic juices help in the digestion of:
a)
Fats and carbohydrates
b)
Proteins and fats
c)
Proteins and carbohydrates
d)
Proteins, fats, and carbohydrates
| | Ishan Choudhury answered |
The pancreas contains all kinds of enzymes that can digest proteins, fats, and carbohydrates.
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