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NEET • BIOLOGY • HUMAN HEALTH AND DISEASES
Human health and diseases practice · Mixed difficulty
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31
Medium
31 of 259
Understanding
+4 | -1
Two of the body parts, which do not appear in MRI may be
View answer and explanation
Correct option: B
Scapula and canines
Option B (Scapula and canines) is correct because bone and teeth (especially with fillings) cause artifacts in MRI, making them difficult to image clearly.
32
Medium
32 of 259
Understanding
+4 | -1
Nicotine intake stimulates the …A… to release …B… and …C… into blood circulation. This lead to increase in …D… and an increase …E… .
Here A and E refers to
Here A and E refers to
View answer and explanation
Correct option: A
A-adrenal gland, B-adrenaline, C-nor-adrenaline, D-blood pressure, E-heart rate
Option A (A-adrenal gland, B-adrenaline, C-nor-adrenaline, D-blood pressure, E-heart rate) is correct because nicotine stimulates the adrenal gland to release adrenaline and noradrenaline, leading to increased blood pressure and heart rate.
33
Medium
33 of 259
Remembering
+4 | -1
A chemical substance produce produced by a microorganism for inhibiting the growth of another is
View answer and explanation
Correct option: B
Antibiotic
Option B (Antibiotic) is correct because an antibiotic is a chemical substance produced by a microorganism that inhibits the growth of or kills another microorganism.
34
Medium
34 of 259
Remembering
+4 | -1
Flemming, Chain and Florey were awarded the Nobel Prize in 1945 for the discovery of
View answer and explanation
Correct option: C
Penicillin
The correct answer is C (Penicillin) because Flemming, Chain, and Florey were awarded the Nobel Prize in 1945 for their work on penicillin.
35
Medium
35 of 259
Understanding
+4 | -1
World health organization has started a number of programmes to prevent spreading of HIV infection
Few such steps include
I. ensuring use of disposable needles and syringes
II. free distribution of condoms
III. advocating safe sex
IV. controlling drug abuse
Which of the steps given above are correct?
Few such steps include
I. ensuring use of disposable needles and syringes
II. free distribution of condoms
III. advocating safe sex
IV. controlling drug abuse
Which of the steps given above are correct?
View answer and explanation
Correct option: D
I, II, III and IV
Option D is correct because all listed steps (disposable needles, condoms, safe sex, and drug abuse control) are crucial for preventing the spread of HIV infection.
36
Easy
36 of 259
Understanding
+4 | -1
Human health can be maintained by
View answer and explanation
Correct option: D
All of these
The correct answer is D (All of these) because maintaining human health requires a combination of a balanced diet, personal hygiene, and regular exercise.
37
Easy
37 of 259
Understanding
+4 | -1
Graft transplantation to save certain patients fails due to the rejection of such organs by the patient. Which type of immune response is responsible for such type of rejection?
View answer and explanation
Correct option: A
Cell-mediated immune response
Option A (Cell-mediated immune response) is correct because graft rejection is primarily mediated by T cells, which are part of the cell-mediated immune response.
38
Hard
38 of 259
Remembering
+4 | -1
Who received Nobel prize in 1951 for the development of vaccine for yellow fever?
View answer and explanation
Correct option: A
Max Theiler
Option A (Max Theiler) is correct because he was awarded the Nobel Prize in 1951 for his work on developing a vaccine against yellow fever.
39
Hard
39 of 259
Understanding
+4 | -1
An attenuated pathogen is one which
View answer and explanation
Correct option: A
Has lost pathogenicity but not antigenicity
Option A (Has lost pathogenicity but not antigenicity) is correct because attenuated pathogens retain their ability to stimulate an immune response without causing disease.
40
Medium
40 of 259
Understanding
+4 | -1
PMNL are one of the main components of
View answer and explanation
Correct option: B
Cellular barrier of innate immunity
Option B (Cellular barrier of innate immunity) is correct because PMNLs (Polymorphonuclear leukocytes) are phagocytic cells that act as a cellular barrier in the innate immune system.
41
Medium
41 of 259
Understanding
+4 | -1
Select the correct statement from the set given below
I. Growing number of people are taking LSD and other drugs like barbiturates and amphetamines
II. Several plants, fruits and seed having hallucinogenic properties have been used in folk-medicine
Which of the statements given above is/are correct?
I. Growing number of people are taking LSD and other drugs like barbiturates and amphetamines
II. Several plants, fruits and seed having hallucinogenic properties have been used in folk-medicine
Which of the statements given above is/are correct?
View answer and explanation
Correct option: C
I and II
Option C (I and II) is correct because both statements are true. There is an increasing trend of drug use, and hallucinogenic plants have been used in folk medicine.
42
Easy
42 of 259
Understanding
+4 | -1
Cell division or mitosis is normal process in a living cell, but sudden and abnormal mitosis in an organ will frequently result in
View answer and explanation
Correct option: B
Cancer
Option B (Cancer) is correct because uncontrolled and abnormal mitosis is a hallmark of cancer development.
43
Hard
43 of 259
Understanding
+4 | -1
The following are types of parasites
(I) Intracellular
(II) Coelozoic
(III) Intercellular
(IV) Hyperparasite
Which of the above are correct regarding
Nosema notabilis?
(I) Intracellular
(II) Coelozoic
(III) Intercellular
(IV) Hyperparasite
Which of the above are correct regarding
Nosema notabilis?
View answer and explanation
Correct option: B
I, IV
The correct answer is B (I, IV) because Nosema notabilis is an intracellular parasite and can be a hyperparasite.
44
Hard
44 of 259
Analyzing
+4 | -1
[A]: Smoking stimulates secretion of gastric juice in stomach even when stomach is empty.
[R]: It is aimed at quickening the digestion of fcod when taken.
[R]: It is aimed at quickening the digestion of fcod when taken.
View answer and explanation
Correct option: C
A is true but R is false
Option C is correct because smoking does stimulate the secretion of gastric juice, but the reason given about quickening digestion is false.
45
Medium
45 of 259
Understanding
+4 | -1
A person suffering from cancer is treated with radiotherapy. Which is correct for this technique of treatment?
View answer and explanation
Correct option: D
Tumour cells are irradiated lethally
Option D (Tumour cells are irradiated lethally) is correct because radiotherapy aims to kill cancer cells by damaging their DNA with radiation.
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46
Easy
46 of 259
Remembering
+4 | -1
Name the vaccine which is produced by using recombinant DNA technology
View answer and explanation
Correct option: C
Hepatitis B
Option C (Hepatitis B) is correct because the Hepatitis B vaccine is a recombinant vaccine produced using yeast.
47
Medium
47 of 259
Understanding
+4 | -1
Which one is correctly matched?
View answer and explanation
Correct option: C
AIDS virus – reverse transcriptase
Option C (AIDS virus – reverse transcriptase) is correctly matched because the AIDS virus (HIV) uses reverse transcriptase to convert RNA to DNA.
48
Hard
48 of 259
Remembering
+4 | -1
Grafting of tissue or organ between individuals of different species is called
View answer and explanation
Correct option: C
Xenograft
Option C (Xenograft) is correct because a xenograft is a tissue or organ transplant between individuals of different species.
49
Easy
49 of 259
Remembering
+4 | -1
Cancer of the internal organs is detected by
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because radiography, computed tomography, and magnetic resonance imaging are all used to detect cancer in internal organs.
50
Hard
50 of 259
Understanding
+4 | -1
Assertion: Charas is a psychoactive drug.
Reason: Charas contains THC of 25 to 60%.
Reason: Charas contains THC of 25 to 60%.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A is correct because Charas is indeed a psychoactive drug, and the reason correctly identifies that it contains a significant amount of THC.
51
Easy
51 of 259
Remembering
+4 | -1
Artificial immunity can be acquired by:
View answer and explanation
Correct option: B
Vaccination
Option B (Vaccination) is correct because vaccination introduces antigens to stimulate an immune response and provide artificial immunity.
52
Medium
52 of 259
Understanding
+4 | -1
Measures for personal hygiene include
I. Intake of clean drinking water
II. Keeping the body clean
III. Disinfection of water resources
Which of the statements given above are correct?
I. Intake of clean drinking water
II. Keeping the body clean
III. Disinfection of water resources
Which of the statements given above are correct?
View answer and explanation
Correct option: C
II and III
The correct answer is A (I and II) because personal hygiene primarily includes intake of clean drinking water and keeping the body clean.
53
Medium
53 of 259
Understanding
+4 | -1
Which one of the following is useful in identifying the different strains of a causal microbe of an infectious disease?
View answer and explanation
Correct option: C
Complementary DNA
Option C (Complementary DNA) is correct because cDNA is used in techniques like PCR and DNA sequencing to identify different strains of microbes.
54
Medium
54 of 259
Understanding
+4 | -1
Vaccines, when introduced into the body, stimulates the production of
View answer and explanation
Correct option: B
Antibody
Option B is correct because vaccines introduce antigens into the body, which stimulate the immune system to produce antibodies that provide immunity.
55
Hard
55 of 259
Understanding
+4 | -1
Statement I : Mature -cells synthesis various types of antibodies which are displayed on their membranes.
Statement II : Antigenic site binds to an antibody is called epitope
Statement II : Antigenic site binds to an antibody is called epitope
View answer and explanation
Correct option: A
Both statement I and statement II are true
Option A (Both statement I and statement II are true) is correct because mature B-cells do display antibodies, and the antigenic site that binds to an antibody is indeed called an epitope.
56
Medium
56 of 259
Understanding
+4 | -1
ELISA assay
View answer and explanation
Correct option: C
Involves addition of substrate which is converted into coloured end product
Option B is correct because vaccines introduce antigens into the body, which then stimulate the immune system to produce antibodies that provide immunity against the specific disease.
57
Hard
57 of 259
Understanding
+4 | -1
Assertion: Kidney transplant from a non-matching donor gets rejected.
Reason: Cell mediated immunity mediated by B-lymphocytes reject it.
Reason: Cell mediated immunity mediated by B-lymphocytes reject it.
View answer and explanation
Correct option: C
If Assertion is correct but Reason is incorrect
Option C is correct. Kidney transplant rejection is cell-mediated, but it's primarily T-lymphocytes, not B-lymphocytes, that mediate the rejection.
58
Hard
58 of 259
Remembering
+4 | -1
Fibroid (leiomyoma) uterus is a:
View answer and explanation
Correct option: A
Benign tumour of uterus
Option A is correct. A fibroid (leiomyoma) uterus is a benign tumor of the uterus.
59
Medium
59 of 259
Understanding
+4 | -1
Proliferation of cancer cells is not limited because of
View answer and explanation
Correct option: A
Differing surface proteins
Option A (Differing surface proteins) is correct because altered surface proteins on cancer cells prevent normal cell-cell interactions and growth regulation.
60
Hard
60 of 259
Understanding
+4 | -1
Assertion : -cells work chiefly by secreting
substances called antibodies into the body
fluids.
Reason : Antibodies ambush foreign antigen
circulating in the blood stream.
substances called antibodies into the body
fluids.
Reason : Antibodies ambush foreign antigen
circulating in the blood stream.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option D (If both Assertion and Reason are false) is correct because -cells secrete insulin, not antibodies, and antibodies target antigens in the bloodstream.
Revision notes and key takeaways
Review HUMAN HEALTH AND DISEASES in your textbook or class notes, then use this set to check your understanding.
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