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Human Health and Diseases Class 12 Biology MCQ With Solutions

Update on: 02 Feb 2024, 03:13 PM

Human Health and Diseases Class 12 Biology MCQ with Answers has been organized according to the latest exam pattern in the CBSE Class 12 Biology syllabus for the upcoming CBSE Class 12 Biology Exam. Human Health and Diseases covers topics like common diseases in humans, immunity, immunodeficiency diseases, cancer adolescence: Drug and alcohol abuse, These questions are designed to help students understand the concept thoroughly. They are helpful for revision and for grasping the concepts effectively. These MCQ questions cover in-text book questions and important topics to help students assess their preparation level for CBSE board exams.

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CBSE Class 12 Chapter 7 Human Health and Diseases MCQs

Check below the CBSE Class 12 Biology MCQ with answers and Clear your idea of Chapter 7 Human Health and Diseases.

Q.1. Schick test is confirmatory test for

(a) diphtheria (b) syphilis
(c) leprosy (d) scarlet fever.

Answer

(a): Schick test is a method for determining susceptibility to diphtheria.

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Q.2. Injectable polio vaccine was discovered by

(a) Jonas Salk (b) Robert Koch
(c) M. Theiler (d) Louis Pasteur.

Answer

(c): Jonas Salk developed the first safe and effective injectable vaccine for polio (Salk vaccine)

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Q.3. Fear of water is the most important characteristic symptom of

(a) polio (b) rabies
(c) tetanus (d) chikungunya.

Answer

(b)

Q.4. Which of the following is often referred to as break bone fever?

(a) Hepatitis (b) Rhinitis
(c) Dengue (d) Kala azar

Answer

(c): Dengue fever is an acute illness with sudden onset of fever, followed by development of generalised symptoms. It is also known as ‘breakbone fever’ because of severe pain in muscle, joint and bone.

Q.5. All are bacterial diseases except

(a) gonorrhoea (b) anthrax
(c) swine flu (d) whooping cough.

Answer

(c): Swine flu or swine influenza is a respiratory disease caused by influenza viruses (H₁N₁).

Q.6. Lock jaw disease is caused by

(a) Yersinia pestis (b) Clostridium tetani
(c) Bacillus anthracis (d) none of these.

Answer

(b): The bubonic plague is caued by the bacteria Yersinia pestis. Anthrax is a serious infectious disease caused by rod- shaped bacteria Bacillus anthracis.

Q.7. The infectious stage of Plasmodium that enters the human body is

(a) trophozoites (b) sporozoites
(c) female gametocytes (d) male gametocytes.

Answer

(b): Plasmodium enters the human body as sporozoites (infectious form) through the bite of an infected female Anopheles mosquito.

Q.8. Which of the following is produced by natural killer cells which causes cellular destruction?

(a) Interferons b) Perforins
(c) Lysozyme (d) Pyrogen

Answer

(b)

Q.9. Hapten is a

(a) complete antigen (b) self antigen
(c) partial antigen (d) none of these.

Answer

(c): Haptens (partial antigens) are substances which are incapable of inducing antibody formation by themselves, but can induce antibody on combining with larger molecules which serve as carriers.

Q.10. Which of the following antibody exists as pentamer?

(a) IgA (b) IgD
(c) IgG (d) IgM Fossilisation is

Answer

(d): Antibody IgA exists as a dimer, IgD, IgE and IgG as monomers and IgM as a pentamer.

We hope the MCQs for the CBSE Class 12 Biology Chapter 7 on Human Health and Diseases are helpful for your board exam preparation.

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