Why Do We Fall Il? - Compulsory Test - Class 9 MCQ

Cholera, tuberculosis and anthrax are bacterial disease. Influenza is a viral disease that has very high fever, vomiting and body ache.

Diarrhea is caused by bacteria E.coli,.protozoaEntamoebahistolytica and virus Rotavirus etc. so, diarrhea is caused by bacteria, virus as well as protozoa.

To match the given diseases with their respective microorganisms, we need to understand the characteristics of each microorganism.
Protozoa:
- Protozoa are single-celled organisms.
- They can cause various diseases in humans.
Virus:
- Viruses are tiny infectious agents.
- They can only reproduce inside the cells of living organisms.
- They can cause a wide range of diseases.
Bacteria:
- Bacteria are single-celled microorganisms.
- They can be found in various habitats.
- Some bacteria can cause diseases in humans.
Worms:
- Worms are multicellular organisms.
- They can be parasitic or non-parasitic.
- Some worms can cause diseases in humans.
Now let's match the given diseases with their respective microorganisms:
(1) Protozoa:
- Malaria is caused by the protozoan parasite Plasmodium.
(2) Virus:
- Chicken Pox is caused by the varicella-zoster virus.
(3) Bacteria:
- Tuberculosis is caused by the bacterium Mycobacterium tuberculosis.
(4) Worms:
- Elephantiasis is caused by the parasitic worms known as filarial worms.
Therefore, the correct match is:
Answer: A
- (1) Protozoa - D (Malaria)
- (2) Virus - A (Chicken Pox)
- (3) Bacteria - C (Tuberculosis)
- (4) Worms - B (Elephantiasis)

The correct matching of the given options is:

(1) Air-borne disease: C. Pneumonia

(2) Water-borne disease: B. Cholera

(3) Carriers: D. Rabies

(4) Physical contact: A. Gonorrhea

Explanation:

Air-borne disease: These are the diseases that are transmitted through the air by inhaling the infectious particles.

• Pneumonia is an example of an air-borne disease.

Water-borne disease: These are the diseases that are transmitted through contaminated water.

• Cholera is an example of a water-borne disease.

Carriers: These are individuals who carry disease-causing organisms without showing any symptoms and can transmit the disease to others.

• Rabies is an example of a disease transmitted by carriers.

Physical contact: These are the diseases that are transmitted through direct physical contact with an infected person or their bodily fluids.

• Gonorrhea is an example of a disease transmitted through physical contact.

Therefore, the correct matching of the given options is A. 1-C, 2-B, 3-D, 4-A.

Explanation:
To match the given diseases with their correct responses, we need to identify the causative agents or characteristics of each disease.
(1) Sleeping sickness is caused by Trypanosoma parasite.
(2) Kala-azar is caused by Leishmania parasite.
(3) Roundworm found in human intestine refers to Ascaris lumbricoides.
(4) Acne is a skin condition usually caused by Staphylococci bacteria.
Now, let's match the diseases with their correct responses:
A: 1-A, 2-C, 3-B, 4-D (Incorrect)
B: 1-B, 2-D, 3-A, 4-C (Correct)
C: 1-D, 2-A, 3-C, 4-B (Incorrect)
D: 1-C, 2-B, 3-D, 4-A (Incorrect)
Therefore, the correct match is Option B: 1-B, 2-D, 3-A, 4-C.

Robert Koch was the first pathologists who established that disease are mainly caused by pathogen. Disease causing microbes are called pathogen.

Germinated pulses contain more vitamins. A vegetarian diet is better than a non-vegetarian diet. Proteins give less energy than fats and carbohydrates. We should prefer balanced diet in place of fast food.

Iodine test is used to detect carbohydrates in food items. Food item containing carbohydrates gives blue colour in presence of iodine.

Citrus fruits contains Vitamins C is large quantity. Due to presence of this citrus foods are sour in taste.

Chronic disease cause long term effects on health as these disease lasts for long duration and harms the vital organs. Lice, acne etc. have no long term effects on our health but jaundice causes long term effects on health.

Asthma and Diabetes are chronic disease as they last for long duration and adversely affects the health of individual. Common cold is acute disease.

Protein is called as body building food. Protein is required in higher quantity during lactation period after the parturition. Milk contains all the nutrients required for growth of baby.

Carbohydrate is present in rice and potato in large quantity. Groundnut contains larger quantity of fat.

Whole meal bread contains roughage. Sugar provide energy, eggs contain protein and butter provides insulation to body.

The state of complete physical, mental and social well-being is called healthy. Mental and social well-being are difficult to measure.

Explanation:
The incorrect statement among the given options is:
B. Antibiotics work against viral infections
Here is a detailed explanation of each statement:
A. Infectious diseases are caused by micro-organisms:
- This statement is correct. Infectious diseases are caused by micro-organisms such as bacteria, viruses, fungi, and parasites.
B. Antibiotics work against viral infections:
- This statement is incorrect. Antibiotics are designed to target and kill bacteria, not viruses. Viral infections require antiviral medications, not antibiotics.
C. Vaccines develop immunity in children:
- This statement is correct. Vaccines stimulate the immune system to produce a response against specific pathogens, leading to the development of immunity in children and adults.
D. Female Anopheles is a causal organism of malaria:
- This statement is correct. Female Anopheles mosquitoes are the primary vectors for transmitting malaria parasites to humans through their bites.
Therefore, the correct answer is:
D. All of these

Explanation:
To determine which of the given options is not an antibiotic, we need to understand what an antibiotic is. An antibiotic is a type of medication that is used to treat bacterial infections. It works by killing or inhibiting the growth of bacteria.
Let's analyze each option:
A. Penicillin: Penicillin is an antibiotic. It is one of the most commonly used antibiotics and is effective against a wide range of bacterial infections.
B. Insulin: Insulin is not an antibiotic. It is a hormone that is produced by the pancreas and is important for regulating blood sugar levels in the body. It is used to treat diabetes, not bacterial infections.
C. Streptomycin: Streptomycin is an antibiotic. It is commonly used to treat tuberculosis and other bacterial infections.
D. BCG: BCG stands for Bacillus Calmette-Guérin. It is a vaccine that is used to prevent tuberculosis, not to treat bacterial infections. It contains a weakened strain of the bacteria Mycobacterium bovis.
Therefore, the correct answer is B. Insulin is not an antibiotic. Insulin is used to treat diabetes, not bacterial infections.

Living in a clean space, social equality and harmony, and a balanced diet are all important factors for good health. However, a large furnished house is not directly linked to good health.
Here is a detailed explanation of why A, C, and D are important for good health:
Living in a clean space:
- Clean surroundings help prevent the spread of diseases and infections.
- Reduces the risk of allergies and respiratory issues.
- Promotes overall well-being and mental health.
Social equality and harmony:
- Promotes a sense of belonging and reduces stress.
- Encourages support and cooperation among individuals.
- Reduces the risk of mental health issues and promotes overall happiness.
Balanced diet:
- Provides essential nutrients for growth, development, and maintenance of the body.
- Reduces the risk of chronic diseases such as obesity, diabetes, and heart disease.
- Boosts the immune system and improves overall energy levels.
In conclusion, living in a clean space, social equality and harmony, and a balanced diet are all important aspects of maintaining good health.

AIDS can be transmitted through various means, but not all forms of contact pose a risk. Let's break down the different modes of transmission and identify which ones are correct:
A. Sexual contact: HIV, the virus that causes AIDS, can be transmitted through unprotected sexual intercourse with an infected person. This includes vaginal, anal, and oral sex.
B. Handshake: HIV is not transmitted through casual contact such as shaking hands. The virus does not survive well outside the body and cannot be transmitted through simple physical contact.
C. Hugs: HIV is also not transmitted through hugging or any other form of non-sexual physical contact. The virus does not spread through skin-to-skin contact or saliva.
D. Breastfeeding: HIV can be transmitted from an HIV-positive mother to her child through breastfeeding. However, with proper medical interventions such as antiretroviral therapy, the risk of transmission can be significantly reduced.
Based on the above information, the correct answer is B. AIDS can be transmitted through sexual contact and breastfeeding. Handshake and hugs do not pose a risk of transmission.

Explanation:
The correct statement is A. High blood pressure is caused by excessive weight and lack of exercise. Here is a detailed explanation for each statement:
A. High blood pressure is caused by excessive weight and lack of exercise:
- Excessive weight puts extra strain on the heart, leading to an increase in blood pressure.
- Lack of exercise can contribute to weight gain and also lead to poor circulation, which can raise blood pressure.
B. Cancers can be caused by genetic abnormalities:
- Genetic abnormalities can increase the risk of developing certain types of cancer.
- For example, mutations in the BRCA1 and BRCA2 genes are associated with an increased risk of breast and ovarian cancer.
C. Peptic ulcers are caused by eating acidic food:
- Peptic ulcers are mainly caused by infection with the bacteria Helicobacter pylori or long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin or ibuprofen.
- While certain foods may exacerbate symptoms, they do not directly cause peptic ulcers.
D. Acne is not caused by staphylococci:
- Acne is a skin condition that is primarily caused by hormonal changes during puberty, which lead to increased sebum production.
- Staphylococci bacteria can contribute to the development of acne by infecting blocked hair follicles, but they are not the primary cause of acne.
In conclusion, the correct statement is A. High blood pressure is caused by excessive weight and lack of exercise.

World AIDS day is observed on December 1. Malaria day is observed on 20th August. World TB day is observed on24th March. TAB vaccine provides immunity for 3 years.

The enzyme present in tears contain Lysozyme enzyme that prevents eye infection by creating physiological barrier.

Blood capillaries can easily rupture due to deficiency of Vitamin C.

Vitamin A is required for proper vision. So, particular vitamin that improves the vision in dim light is called vitamin A.

To determine which of the options is not an antibiotic, let's first understand what an antibiotic is.
Definition: An antibiotic is a type of medication that is used to treat bacterial infections. It works by either killing bacteria or preventing their growth.
Now, let's analyze each option:
A. Penicillin: Penicillin is a type of antibiotic that is commonly used to treat various bacterial infections. It is effective against a wide range of bacteria.
B. Insulin: Insulin is not an antibiotic. It is a hormone that is produced by the pancreas to regulate blood sugar levels in the body. It is used to manage diabetes, a metabolic disorder, and has no effect on bacterial infections.
C. Streptomycin: Streptomycin is a type of antibiotic that is primarily used to treat tuberculosis and other bacterial infections. It works by interfering with the production of proteins in bacteria.
D. BCG: BCG stands for Bacillus Calmette-Guérin. It is not an antibiotic but rather a vaccine used to prevent tuberculosis (TB). It contains a weakened strain of the bacteria that causes TB and helps to stimulate the immune system to protect against the disease.
Therefore, the option that is not an antibiotic is B. Insulin.