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Assertion & Reason Test: Life Processes - 2 - Class 10 MCQ


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15 Questions MCQ Test - Assertion & Reason Test: Life Processes - 2

Assertion & Reason Test: Life Processes - 2 for Class 10 2024 is part of Class 10 preparation. The Assertion & Reason Test: Life Processes - 2 questions and answers have been prepared according to the Class 10 exam syllabus.The Assertion & Reason Test: Life Processes - 2 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion & Reason Test: Life Processes - 2 below.
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Assertion & Reason Test: Life Processes - 2 - Question 1

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Digestion breaks large complex molecules to simple smaller molecules which can be easily absorbed.

Reason (R): Digestion is necessary for the absorption of all molecules.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 1
Digestion breaks large complex organic molecules to simple smaller ones which can be easily absorbed. However, certain molecules such as glucose, vitamin C etc, do not need any digestion before their absorption.
Assertion & Reason Test: Life Processes - 2 - Question 2

Assertion (A): Lipases help in emulsification of fats.

Reason (R): Lipases hydrolyses fats and oils.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 2
Bile helps in emulsification of fats whereas lipases are the enzymes which hydrolyze fats and oils.
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Assertion & Reason Test: Life Processes - 2 - Question 3

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Energy is used during the process of respiration.

Reason (R): Respiration stores energy in the form of ATP.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 3
Respiration involves the oxidation of glucose inside the mitochondria to produce energy, which is stored in the high energy bonds of ATP molecules as biologically useful energy.
Assertion & Reason Test: Life Processes - 2 - Question 4

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): In humans, there is a complex respiratory system.

Reason (R): Human skin is impermeable to gases.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 4
Humans need more oxygen to maintain their high metabolic rates. Thus, a complex respiratory system has evolved so as to meet this need.
Assertion & Reason Test: Life Processes - 2 - Question 5

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): In the human heart, there is no mixing of oxygenated and deoxygenated blood.

Reason (R): Valves are present in the heart which allows the movement of blood in one direction only.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 5
There is no mixing of oxygenated and deoxygenated blood due to presence of interauricular and inter- ventricular septum. On the other hand, valves are present in the heart which allows the movement of blood in one direction only.
Assertion & Reason Test: Life Processes - 2 - Question 6

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Plants have low energy needs.

Reason (R): Plant bodies have a large proportion of dead cells.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 6
Because plants have a large proportion of dead cells in many tissues. So, their energy needs are low and they can afford to have slow transport system.
Assertion & Reason Test: Life Processes - 2 - Question 7

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Human body produces highly toxic substances, which if not eliminated may cause death.

Reason (R): Excretory substance removes nitrogenous waste from the body.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 7
The biological process which involves the removal of harmful metabolic wastes from the body is called excretion. If these harmful wastes are not removed from the body, then it may cause the death of the organism.
Assertion & Reason Test: Life Processes - 2 - Question 8

Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): Haemodialysis can save the life of patients with kidney failure.

Reason (R): Waste products like urea can be removed from the blood by haemodialysis.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 8
In case of kidney failure, haemodialysis is the process of purifying blood (or removing waste products like urea) by an artificial kidney. This can save the life of the patient.
Assertion & Reason Test: Life Processes - 2 - Question 9

Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : in the daytime, CO2 generated during respiration is used up for photosynthesis.

Reason : There is no CO2 release during the day.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 9
Both A and R are true and R is the correct explanation of A In night, dark reaction of photosynthesis occurs, in which the products of light reaction, i.e. CO2, ATP, NADPH and H2O are utilised. CO2 is reduced for the production of carbohydrates.
Assertion & Reason Test: Life Processes - 2 - Question 10

Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Lungs always contain a residual volume of air.

Reason : It provides sufficient time for oxygen to be absorbed and for carbon dioxide to be released.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 10
Both A and R are true and R is the correct explanation of A. During the breathing cycle, when air is taken in and let out, the lungs always contain a residual volume of air. It provides sufficient time for oxygen to be absorbed and for carbon dioxide to be released. Both Reason and Assertion are true and Reason is the correct explanation of Assertion.
Assertion & Reason Test: Life Processes - 2 - Question 11

Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Translocation of sugar occurs through the phloem.

Reason : It is achieved by diffusion of sugars through phloem.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 11
A is true but R is false. The transport or movement of soluble products (sugar) of photosynthesis from leaves to other parts of the plant is termed as translocation. It occurs in the part of vascular tissue known as phloem. The translocation in phloem is mainly achieved by utilising energy by expenditure of ATP. Assertion is true, but Reason is false.
Assertion & Reason Test: Life Processes - 2 - Question 12

Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Energy is used during the process of respiration.

Reason : Respiration stores energy in the form of ATP.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 12
A is false but R is true. Respiration involves the oxidation of glucose inside the mitochondria to produce energy, which is stored in the high energy bonds of ATP molecules as biologically useful energy.
Assertion & Reason Test: Life Processes - 2 - Question 13

Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Egestion is the removal of nitrogenous waste products from the body.

Reason : Excretion is the discharge of undigested matter from the digestive tract.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 13
Both Assertion and Reason are false. Egestion is the discharge of undigested matter from the digestive tract via anus. While, excretion is the removal of nitrogenous waste products from the body. Thus, both Assertion and Reason are false.
Assertion & Reason Test: Life Processes - 2 - Question 14

Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : In the human heart, there is no mixing of oxygenated and deoxygenated blood.

Reason : Valves are present in the heart which allows the movement of blood in one direction only.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 14
Both A and R are true but R is not the correct explanation of A. There is no mixing of oxygenated and deoxygenated blood due to presence of inter-auricular and interventricular septum. On the other hand, valves are present in the heart which allows the movement of blood in one direction only.
Assertion & Reason Test: Life Processes - 2 - Question 15

Direction: The following question consists of two statements - Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:

Assertion : Excretory unit of kidney is nephrons.

Reason : It has no role in secretion of urine.

Detailed Solution for Assertion & Reason Test: Life Processes - 2 - Question 15
A is true but R is false. Nephrons are the basic filtration unit of kidneys. They carry out filtration, selective reabsorption and tubular secretion to form urine in the kidney, which is then passed out through the urethra, via the ureters and urinary bladder.
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