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NEET • BIOLOGY • HUMAN HEALTH AND DISEASES

Human health and diseases practice · Hard

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Showing 31-60 of 69 questions

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31 Hard

31 of 69

Understanding +4 | -1

“CAUTION” is a useful mnemonic for common signs and
symptoms of cancer. It does not include

I. Change in bowel or bladder habits.

II. A sore that does not heal.

III. Unusual bleeding or discharge.

IV. Thickening or lump in breast, testicles, or elsewhere.

V. Obvious change in the size, color, shape or thickness of a
wart, mole, or mouth sore.

VII. Nagging cough or hoarseness.

View answer and explanation

Correct option: D

It includes all of these

Option D (It includes all of these) is correct because all the listed items are part of the CAUTION mnemonic for common signs and symptoms of cancer.

32 Hard

32 of 69

Understanding +4 | -1

Assertion (A): Innate immunity is non specific defence.

Reason (R): It consists of four types of barriers.

View answer and explanation

Correct option: B

If both assertion and reason or true but reason is not the correct explanation of the assertion

Option B (If both assertion and reason are true but reason is not the correct explanation of the assertion) is correct because innate immunity is indeed non-specific, and it does consist of barriers, but the barriers are not the reason for its non-specificity.

33 Hard

33 of 69

Remembering +4 | -1

The causative agent of mad-cow disease is a

View answer and explanation

Correct option: B

Prion

Option B (Prion) is correct because mad-cow disease (Bovine Spongiform Encephalopathy) is caused by prions, which are misfolded proteins.

34 Hard

34 of 69

Understanding +4 | -1

Assertion: Tranquillizers are called
antipsychosis drug.

Reason: Tranquillizers are used to treat psychosis.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and
Reason is the correct explanation of Assertion

Option A is correct because Tranquilizers are indeed called antipsychotic drugs, and they are used to treat psychosis.

35 Hard

35 of 69

Understanding +4 | -1

Which of the following act as an antigen, but do not induce antibody production?

View answer and explanation

Correct option: C

Haptens

Option C (Haptens) is correct because haptens are small molecules that can act as antigens but require a carrier molecule to induce antibody production.

36 Hard

36 of 69

Remembering +4 | -1

Which of the following types of antibiotics is anthramycin?

View answer and explanation

Correct option: C

Antitumor

Option C (Antitumor) is correct because anthramycin is an antibiotic with antitumor properties, used in cancer treatment.

37 Hard

37 of 69

Remembering +4 | -1

Third moulting in Ascaris larva takes place in

View answer and explanation

Correct option: A

Lung

The correct answer is A (Lung) because the third moulting of Ascaris larva occurs in the lungs.

38 Hard

38 of 69

Understanding +4 | -1

Assertion: Morphine is very effective and
sedative.

Reason: It is very useful for the patients who
have depression.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C is correct because while Morphine is effective and sedative, it is not useful for patients with depression; it can actually worsen their condition.

39 Hard

39 of 69

Remembering +4 | -1

Koch's postulates are related to:

View answer and explanation

Correct option: C

Laws of diseases

The correct answer is C (Laws of diseases) because Koch's postulates are a set of criteria used to establish a causative relationship between a microorganism and a disease.

40 Hard

40 of 69

Understanding +4 | -1

Assertion: The phenomenon where tumour cells
detach and migrate to other parts of the body
where they give rise to secondary tumors is
called metastasis.

Reason: Abnormal antigens on the surface of
cell and unusual number of chromosomes cause
metastasis.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and
Reason is the correct explanation of Assertion

Option B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) is correct because while both metastasis and abnormal cell characteristics are true, the reason doesn't directly explain the mechanism of metastasis.

41 Hard

41 of 69

Understanding +4 | -1

Arrange the following statement regarding
Amoebiasis infection:

(a) The trophozoites multiply by binary fission
and produce cysts and both stages are passed
in the faeces

(b) Trophozoites migrate to the large intestine

(c) Excystation occurs in the small intestine and
trophozoites are released
(b) Infection by Entamoeba histolytica occurs by
ingestion of mature cysts in fecally
contaminated food, water, or hands.

View answer and explanation

Correct option: B

d - c - b - a

Option C is correct because it represents the correct sequence of events in Amoebiasis infection: infection by cysts, excystation, migration to the large intestine, and multiplication.

42 Hard

42 of 69

Understanding +4 | -1

Antigen is a substance which:

View answer and explanation

Correct option: C

Triggers the immune system

Option C is correct. An antigen is a substance that triggers an immune response in the body.

43 Hard

43 of 69

Remembering +4 | -1

Choose the correct regarding antibodies

View answer and explanation

Correct option: B

IgG-Cross placenta

Option B (IgG-Cross placenta) is correct because IgG antibodies are the only type that can cross the placental barrier, providing passive immunity to the fetus.

44 Hard

44 of 69

Remembering +4 | -1

Which one of the following is the most effective in Ascaris infection?

View answer and explanation

Correct option: D

Oil of Chenopodium

Option D (Oil of Chenopodium) is correct because Oil of Chenopodium is a traditional anthelmintic drug effective against Ascaris infections.

45 Hard

45 of 69

Understanding +4 | -1

Assertion : Bordeaux mixture is able to eradicate
many fungal diseases.

Reason : It is a fungicide which has proved to
be effective for control of disease.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and
Reason is the correct explanation of Assertion

Option A is correct because both the assertion and the reason are true, and the reason correctly explains the assertion. Bordeaux mixture is indeed a fungicide effective for controlling many fungal diseases.

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46 Hard

46 of 69

Remembering +4 | -1

An antiviral chemical produced by the animal cell is

View answer and explanation

Correct option: B

Interferon

Option B (Interferon) is correct because interferons are antiviral proteins produced by animal cells in response to viral infections.

47 Hard

47 of 69

Remembering +4 | -1

Carcinogen present in cigarette smoke is

View answer and explanation

Correct option: A

Benzopyrine

Option A (Benzopyrine) is correct because benzopyrine (also known as benzo[a]pyrene) is a potent carcinogen found in cigarette smoke.

48 Hard

48 of 69

Remembering +4 | -1

HIV infection can be confirmed by which test?

View answer and explanation

Correct option: D

Western blot

Option D (Western blot) is correct because the Western blot test is the confirmatory test for HIV infection, used after a positive ELISA test.

49 Hard

49 of 69

Understanding +4 | -1

Which of the following is not a characteristic of a
cancerous cell?

View answer and explanation

Correct option: D

It becomes highly differentiated

Option D (It becomes highly differentiated) is correct because cancer cells are typically undifferentiated or poorly differentiated, meaning they have lost specialized functions.

50 Hard

50 of 69

Understanding +4 | -1

Because………. is inexpensive, easy to adminster, and
produces excellent immunity in the intestine (which helps
prevent infection with wild virus in areas where it is
endemic, it has been the vaccine of choice for controlling
poliomyelitis in many countries including India where it is
being employed in the pulse polio programme.

View answer and explanation

Correct option: A

OPV

Option A (OPV) is correct because Oral Polio Vaccine (OPV) is inexpensive, easy to administer, and provides excellent intestinal immunity, making it suitable for controlling poliomyelitis, especially in pulse polio programs.

51 Hard

51 of 69

Understanding +4 | -1

Assertion : AIDS is a disorder caused by HIV.

Reason : HIV is a virus that damages immune
system of its host.

View answer and explanation

Correct option: A

If both Assertion and Reason are true and
Reason is the correct explanation of Assertion

Option A is correct because HIV causes AIDS by damaging the immune system, which is the correct explanation.

52 Hard

52 of 69

Remembering +4 | -1

Vinblastine is obtained from:

View answer and explanation

Correct option: A

Catharanthus roseus

Option A (Catharanthus roseus) is correct because vinblastine, an anti-cancer drug, is derived from the Madagascar periwinkle, Catharanthus roseus.

53 Hard

53 of 69

Remembering +4 | -1

Identify the tumor suppressor genes form the following.

View answer and explanation

Correct option: B

P^{53}

genes

Option B (

P^{53}

genes) is correct because

P^{53}

is a well-known tumor suppressor gene that regulates cell division and prevents cancer development.

54 Hard

54 of 69

Analyzing +4 | -1

Assertion : Severe Acute Respiratory
syndromes is common in China.

Reason : China is the most populated country
of the world.

View answer and explanation

Correct option: B

If 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 is not the correct explanation of the assertion. SARS was common in China, and China is the most populated country, but population size doesn't directly cause SARS.

55 Hard

55 of 69

Remembering +4 | -1

The vaccine MMR is effective in preventing

View answer and explanation

Correct option: A

Measles, Mumps, Rubella

Option A (Measles, Mumps, Rubella) is correct because the MMR vaccine is a combination vaccine that provides immunity against measles, mumps, and rubella.

56 Hard

56 of 69

Understanding +4 | -1

[A]: AIDS virus is highly mutable.

[R]: It lacks DNA polymerase to repair its mutated genome.

View answer and explanation

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 the AIDS virus (HIV) mutates rapidly due to the lack of DNA polymerase for error correction during replication.

57 Hard

57 of 69

Remembering +4 | -1

Entamoeba differs from Amoeba is not having

View answer and explanation

Correct option: D

Contractile vacuole

Option D (Contractile vacuole) is correct because Entamoeba, unlike Amoeba, lacks a contractile vacuole, which is used for osmoregulation in freshwater Amoeba.

58 Hard

58 of 69

Remembering +4 | -1

An anxiety disorder characterized by recurrent, unwanted
thoughts and repetitive behaviors is

View answer and explanation

Correct option: C

Obsessive compulsive disorder

Option C (Obsessive compulsive disorder) is correct because OCD is characterized by recurrent, unwanted thoughts (obsessions) and repetitive behaviors (compulsions).

59 Hard

59 of 69

Remembering +4 | -1

Which of these vaccines is not given against viral diseases?

View answer and explanation

Correct option: A

DPT- Diphtheria, Pertussis and Tetanus vaccine

Option A (DPT- Diphtheria, Pertussis and Tetanus vaccine) is correct because DPT vaccine is given against bacterial diseases (Diphtheria, Pertussis, and Tetanus), not viral diseases.

60 Hard

60 of 69

Remembering +4 | -1

Cyclosporine is used:

View answer and explanation

Correct option: B

As immunodepressent

Option B (As immunodepressent) is correct because cyclosporine is an immunosuppressant drug used to prevent rejection of transplanted organs by suppressing the immune system.

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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