We have compiled the NCERT MCQ Questions for Class 12 Biology Chapter 8 Human Health and Disease with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 12 Biology with Answers on a daily basis and score well in exams. Refer to the Human Health and Disease Class 12 MCQs Questions with Answers here along with a detailed explanation.
Human Health and Disease Class 12 MCQs Questions with Answers
Multiple Choice Type Questions
Question 1.
Antigen binding site in an antibody is found between
(a) two light chain
(b) two heavy chains
(c) one heavy chain and one light chain
(d) either between two light chains or between one heavy and one light chain depending upon the nature of antigen.
Answer
Answer: (c) one heavy chain and one light chain
Question 2.
Short-lived immunity acquired from mother to foef’s across placenta or through mother’s milk to the infant is categorised as
(a) Active immunity
(b) Passive immunity
(c) Cellular immunity
(d) Innate non-specific immunity
Answer
Answer: (b) Passive immunity
Question 3.
HIV mainly infects
(a) Cytotoxic T-lymphocytes
(b) Helper lymphocytes
(c) Cell-mediated T-lymphocytes
(d) Killer lymphocytes
Answer
Answer: (b) Helper lymphocytes
Question 4.
A person is injected with gamma-globulin against hepatitis. This is
(a) Artificially acquired active immunity
(b) Artificially acquired passive immunity
(c) Naturally acquired active immunity
(d) Naturally acquired passive immunity
Answer
Answer: (b) Artificially acquired passive immunity
Question 5.
T-lymphocytes first mature in
(a) Thymus
(b) Pancreas
(c) Liver
(d) Spleen
Answer
Answer: (a) Thymus
Question 6.
The major phagocytic cells are
(a) Lymphocytes
(b) Mast cells
(c) Macrophages
(d) Plasma cells
Answer
Answer: (c) Macrophages
Question 7.
On stimulation by a foreign antigen in the body, the T-lymphocytes produce by division a clone of T-cells called
(a) Lymphocytes
(b) Lymphoblasts
(c) Plasma cells
(d) None of these
Answer
Answer: (b) Lymphoblasts
Question 8.
Antiserum contains
(a) Antigen
(b) Leucocytes
(c) Antibodies
(d) None of these
Answer
Answer: (c) Antibodies
Question 9.
A young drug addict used to show symptoms of depressed brain activity, feeling of calmness, relaxation and drowsiness. Possibly he was taking
(a) Amphetamine
(b) Marijuana
(c) Pethidine
(d) Valium
Answer
Answer: (d) Valium
Question 10.
Aspirin is a/an
(a) Antibiotic
(b) Antipyretic
(c) Antiseptic
(d) None of these
Answer
Answer: (b) Antipyretic
Question 11.
Which one of the following is a matching pair of a drug and its category?
(a) Amphetamines-Stimulant
(b) Lysergic acid Dimethylamide-Narcotic
(c) Heroin-psychotropic
(d) Benzodiazepan-pain killer
Answer
Answer: (a) Amphetamines-Stimulant
Question 12.
Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?
(a) morphine
(b) valium
(c) amphetamines
(d) hashish
Answer
Answer: (b) valium
Question 13.
Caffeine is a stimulant present in
(a) Coffee
(b) Tea
(c) Cold drinks
(d) All of these
Answer
Answer: (d) All of these
Question 14.
Entamoeba histolytica differs from Amoeba in absence of
(a) pseudopodia
(b) contractile vacuole
(c) nucleus
(d) ectoplasm
Answer
Answer: (b) contractile vacuole
Question 15.
An insect bite may result in inflammation of that spot. This is triggered by the alarm chemical such as
(a) histamine and dopamine
(b) histamine and kinins
(c) interferons and opsonin
(d) interferons and histones
Answer
Answer: (b) histamine and kinins
Question 16.
AIDS is caused by HIV that principally infects
(a) all lymphocytes
(b) activator B-cells
(c) cytotoxic T-cells
(d) Tu lymphocytes
Answer
Answer: (d) Tu lymphocytes
Question 17.
Cancer cells are more easily damaged by radiations than normal cells because they are
(a) undergoing rapid division
(b) different in structure
(c) non-dividing
(d) starved of mutation
Answer
Answer: (a) undergoing rapid division
Question 18.
Electron beam therapy is a kind of radiation therapy to treat
(a) enlarged prostrate gland
(b) gall bladder stones by breaking them
(c) certain types of cancer
(d) kidney stones
Answer
Answer: (c) certain types of cancer
Question 19.
Which of the following is sexually transmitted disease
(a) Hepatitis-D
(b) Hepatitis-C
(c) Hepatitis-A
(d) Hepatitis-B
Answer
Answer: (d) Hepatitis-B
Question 20.
CO is used for the treatment of
(a) cancer
(b) thyroid
(c) AIDS
(d) hepatitis
Answer
Answer: (a) cancer
Fill in the Blanks
Question 1.
Plasma cells are descendants of ……………….
Answer
Answer: B-lymphocytes
Question 2.
All ………………. are proteins but antigens are not.
Answer
Answer: Antibodies
Question 3.
Perforin is secreted by ………………. T-cells.
Answer
Answer: Cytotoxic
Question 4.
A drug that relieves pain is called ……………….
Answer
Answer: Analgesic
Question 5
………………. is derived from the unripe capsules of white poppy.
Answer
Answer: Opium
Question 6.
The first antibody discovered was ……………….
Answer
Answer: Penicillin
Question 7
……………… is a source of sex hormones.
Answer
Answer: Cholesterol
Question 8.
Insect vector of filariasis is and that of yellow fever, dangue is ……………….
Answer
Answer: Culex, Aedes
Question 9.
The breakdown of the body is self-recognition system is called ……………….
Answer
Answer: Auto immunity
Question 10.
The entry and development or multiplication of viruses and organisms in the body of larger organisms is called ……………….
Answer
Answer: Infection
Write True or False
Question 1.
CMIS releases antibodies.
Answer
Answer: False
Question 2.
Frequent vaginal douches are harmful.
Answer
Answer: True
Question 3.
Saliva contains ptylim to kill the bacteria.
Answer
Answer: False.
Question 4.
The cells that actually release antibodies are plasma cells.
Answer
Answer: True
Question 5.
Disease germs cannot pass through the placenta.
Answer
Answer: False
Question 6.
LSD is hallucinogen.
Answer
Answer: True
Question 7.
Adulhood proceeds adolescence.
Answer
Answer: True
Question 8.
Carcinoma is cancer of stomach, lungs and liver.
Answer
Answer: True
Question 9.
B.C.G. vaccine is used against leprosy.
Answer
Answer: False
Question 10.
Lock jaw is also called Kala azar.
Answer
Answer: False
One Word Questions
Question 1.
Name the process of making a person immune to a disease.
Answer
Answer: Immunization
Question 2.
Is the skin surface acidic or alkaline?
Answer
Answer: Acidic
Question 3.
Can the skin be grown in a culture?
Answer
Answer: Yes
Question 4.
Mention the source of perforin.
Answer
Answer: Killer T-cells
Question 5.
Name the bacteria that normally inhabit vagina.
Answer
Answer: Lactobacilli
Question 6.
Give an alternative term for wandering macrophages.
Answer
Answer: Histiocytes
Question 7.
Which protein occurs in the stratum corveum of epidermis?
Answer
Answer: Keratin (horn)
Question 8.
Which hallucinogen is extracted from a cactus?
Answer
Answer: Mescaline
Question 9.
Name any stimulant.
Answer
Answer: Amphetamines
Question 10.
Which hallucinogen is derived from a fungus?
Answer
Answer: Psilocybin
Question 11.
Which disease is caused by dog bite?
Answer
Answer: Rabies
Question 12.
Name two types of toxins.
Answer
Answer: Exotoxins and endotoxins
Match the Following
| Column I | Column II |
| 1. Lack of B-cells | A. Allergic reaction |
| 2. lysozyme | B. Natural drug |
| 3. Anaphylactic shock | C. Erogot fungus |
| 4. Quinine | D. Cancer |
| 5. LSD | E. Immuno deficiency |
| 6. Leukemia | F. Tears |
Answer
Answer:
| Column I | Column II |
| 1. Lack of B-cells | E. Immuno deficiency |
| 2. lysozyme | F. Tears |
| 3. Anaphylactic shock | A. Allergic reaction |
| 4. Quinine | B. Natural drug |
| 5. LSD | C. Erogot fungus |
| 6. Leukemia | D. Cancer |
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