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NEET • BIOLOGY • HUMAN HEALTH AND DISEASES

Human health and diseases practice · Mixed difficulty

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Showing 1-30 of 259 questions

1 Hard

1 of 259

Understanding +4 | -1

Short-lived immunity acquired from mother to foetus placenta or through mother's milk to the infant is categorized as

View answer and explanation

Correct option: D

Passive immunity

Option D is correct. Passive immunity is acquired when antibodies are transferred from another source, like mother to fetus.

2 Medium

2 of 259

Remembering +4 | -1

Which of the following disease is due to an allergic reaction?

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Correct option: B

Hay fever

Option B (Hay fever) is correct because hay fever is a common allergic reaction to pollen.

3 Easy

3 of 259

Understanding +4 | -1

Which of the following normally confined to their original location and do not spread to other parts of the body?

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Correct option: C

Benign tumour

Option C (Benign tumour) is correct because benign tumors are characterized by their confinement to the original location and lack of spread to other parts of the body.

4 Easy

4 of 259

Remembering +4 | -1

An exaggerated response to some foreign substances when they gain entry into the body is called

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Correct option: A

Allergy or hypersensitivity

Option A (Allergy or hypersensitivity) is correct because it accurately describes an exaggerated immune response to foreign substances.

5 Hard

5 of 259

Remembering +4 | -1

The following bacteria cause food poisoning due to the
release of an exotoxin. The bacterium that releases a
powerful paralytic exotoxin is

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Correct option: B

Clostridium botulinum (botulism)

Option B (Clostridium botulinum (botulism)) is correct because Clostridium botulinum releases a potent paralytic exotoxin causing botulism.

6 Hard

6 of 259

Remembering +4 | -1

By joining forces with the ribosome’s 50S subunit, which of the following prevents protein synthesis?

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Correct option: B

Chloramphenicol

Option B (Chloramphenicol) is correct because Chloramphenicol inhibits protein synthesis by binding to the 50S ribosomal subunit.

7 Easy

7 of 259

Understanding +4 | -1

Amoebiasis is prevented by

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Correct option: D

Drinking boiled water

Option D (Drinking boiled water) is correct because amoebiasis is caused by Entamoeba histolytica, which can be present in contaminated water, and boiling water kills the cysts.

8 Medium

8 of 259

Remembering +4 | -1

Plasmodium is an

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Correct option: A

Endoparasite

Option A (Endoparasite) is correct because Plasmodium lives inside the host's cells and tissues.

9 Hard

9 of 259

Remembering +4 | -1

Which of the following pairs is not correctly matched?

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Correct option: D

Tetanus - Pasteurella pestis

Option D (Tetanus - Pasteurella pestis) is not correctly matched because Tetanus is caused by Clostridium tetani, not Pasteurella pestis.

10 Hard

10 of 259

Understanding +4 | -1

Assertion (A): Entamoeba histolytica is an
obligate anaerobe.

Reason(R): Mitochondria are absent in it.

The correct option among the following is

View answer and explanation

Correct option: A

(A) is true, (R) is true and (R) is the correct
explanation for (A)

Option A is correct because both the assertion and the reason are true, and the reason is the correct explanation for the assertion. Entamoeba histolytica is an obligate anaerobe due to the absence of mitochondria.

11 Easy

11 of 259

Understanding +4 | -1

Antibody production is controlled by

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Correct option: C

Both (1) and (2)

Option A (B-lymphocytes) is correct because B-lymphocytes are primarily responsible for producing antibodies.

12 Medium

12 of 259

Understanding +4 | -1

Consider the following statements. Health is a combination of
I. complete physical health
II. mental health
III. social health
Which of the statements given above are correct?

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Correct option: D

I, II and III

The correct answer is D (I, II and III) because health is a combination of physical, mental, and social well-being.

13 Medium

13 of 259

Understanding +4 | -1

Life style does not include

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Correct option: C

Health increases longevity of people

The correct answer is D (Health increases longevity of people) because lifestyle includes food, rest, exercise, and habits, but not the outcome of health.

14 Hard

14 of 259

Remembering +4 | -1

Which of the following plants root is medicinal
and leaves, flowers and fruits are edible as
vegetable?

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Correct option: D

Holostemma adakodien

Option D (Holostemma adakodien) is correct because the roots of Holostemma adakodien are used medicinally, and its leaves, flowers, and fruits are edible as vegetables.

15 Medium

15 of 259

Understanding +4 | -1

If a person in infected with some deadly microbes to which quick immune response is required as in
tetanus, we need to inject
i) Preformed antibodies
ii) Vaccines

iii) Antitoxins
iv) Mature cells
Select the correct option from the following:

View answer and explanation

Correct option: A

i and iii only

Option A (i and iii only) is correct because preformed antibodies and antitoxins provide immediate, passive immunity, which is crucial in cases like tetanus where a quick response is needed.

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16 Hard

16 of 259

Understanding +4 | -1

Assertion (A): Inhibition or death of one occurs organism by another through the production of some byproduct is known as antibiosis.
Reason (R): Antibiosis is a type of negative interaction.

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Correct option: B

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

Option B is correct because both the assertion and the reason are true, but the reason (negative interaction) is a broader category and doesn't specifically explain the mechanism of antibiosis.

17 Medium

17 of 259

Remembering +4 | -1

Role of spleen in mammals is to

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Correct option: C

Act as haemopoietic tissue

Option C (Act as haemopoietic tissue) is correct because the spleen contains lymphoid tissue that produces lymphocytes and monocytes, contributing to blood cell formation (haemopoiesis), especially during fetal development and in certain disease states.

18 Hard

18 of 259

Understanding +4 | -1

[A]: Some viruses cause cancer.

[R]: Cancer viruses trigger uncontrolled growth of cell.

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Correct option: A

Both A and R are true and R is the correct explanation of A

Option A (Both A and R are true and R is the correct explanation of A) is correct because some viruses can indeed cause cancer by triggering uncontrolled cell growth.

19 Medium

19 of 259

Understanding +4 | -1

Consider the following statements
I. Secondary lymphoid organs includes lymph nodes, spleen and small masses of lymph tissue such as Peyer’s patches, appendix and tonsils
II. The secondary lymphoid organs all the site of lymphocyte maturation and they efficiently trap antigens for exposure to T and B-cells
Which of the statements given above is/are correct?

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Correct option: C

I and II

Option C is correct because ELISA (Enzyme-Linked Immunosorbent Assay) involves adding a substrate that is converted into a colored product, allowing for the detection and quantification of a specific substance.

20 Medium

20 of 259

Analyzing +4 | -1

A patient of diagnosed with internal bleeding, muscular pain, fever, anemia blockage of intestinal passage. He is most likely suffering from

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Correct option: C

Ascariasis

Option C is correct because the symptoms (internal bleeding, muscular pain, fever, anemia, blockage of intestinal passage) are most indicative of Ascariasis.

21 Hard

21 of 259

Analyzing +4 | -1

[A]: In low degree smoking is helpful.
[R]: In low doses, nicotine stimulates conduction of nerves impulses & relaxes the muscles.

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Correct option: A

Both A and R are true and R is the correct explanation of A

Option A is correct because nicotine in low doses can stimulate nerve impulse conduction and muscle relaxation, which can be perceived as helpful in some contexts.

22 Medium

22 of 259

Understanding +4 | -1

Which one the following statements is false?

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Correct option: D

Mescaline is a stimulant

Option D (Mescaline is a stimulant) is false because mescaline is a hallucinogen, not a stimulant.

23 Medium

23 of 259

Remembering +4 | -1

Bacterium, which is concerned with pertussis is

View answer and explanation

Correct option: A

Bordetella pertussis

Option A (Bordetella pertussis) is correct because Bordetella pertussis is the bacterium that causes pertussis, also known as whooping cough.

24 Medium

24 of 259

Understanding +4 | -1

Which of the following option is not correct to a healthy person

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Correct option: C

Genetic disorder deficiencies

The correct answer is C (Genetic disorder deficiencies) because a healthy person is generally free from genetic disorder deficiencies.

25 Medium

25 of 259

Understanding +4 | -1

When people are healthy they are

a. More efficient at work
b. Decreases productivity

c. Brings economic prosperity
d. Increases longevity of people
e. Increases infant and maternal mortality

How many statements are correct about healthy people?

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Correct option: B

Three

The correct answer is B (Three) because statements a, c, and d are correct about healthy people. Statements b and e are incorrect.

26 Easy

26 of 259

Remembering +4 | -1

Under ‘innate immunity’ the mucus coating of respiratory, gastrointestinal and urinogenital lining falls under

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Correct option: C

Physical barriers

Option C (Physical barriers) is correct because the mucus coating acts as a physical barrier preventing pathogens from entering the body.

27 Easy

27 of 259

Remembering +4 | -1

Blood circulation was discovered by

View answer and explanation

Correct option: A

William Harvey

Option A is correct. William Harvey discovered blood circulation.

28 Easy

28 of 259

Remembering +4 | -1

Antibody is connected with

View answer and explanation

Correct option: C

Immune system

Option C (Immune system) is correct because antibodies are a key component of the immune system, responsible for recognizing and neutralizing foreign invaders.

29 Medium

29 of 259

Understanding +4 | -1

A new born baby who receives IgA form its mother’s milk develops

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Correct option: C

Naturally acquired passive immunity

Option C (Naturally acquired passive immunity) is correct because the baby receives pre-formed antibodies (IgA) from the mother's milk, providing temporary protection.

30 Medium

30 of 259

Remembering +4 | -1

During old age, muscles and bones becomes weak due to deficiency of?

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Correct option: A

vit-D

The correct answer is A (vit-D) because Vitamin D is essential for calcium absorption, which is crucial for bone strength. Deficiency leads to weaker bones and muscles in old age.

Revision notes and key takeaways

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Key Takeaways

✓ This set contains 259 single-correct-answer MCQs on HUMAN HEALTH AND DISEASES.
✓ Try each question before opening its answer. Read the explanation where one is available.
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