GATE XL Parasitology and Immunology PYQs & Answers

Questions 1–10 of 19. Imported answers require independent review unless marked reviewed.

Immunoglobulins are classified into the following isotypes: IgG, IgM, IgA, IgD, IgE. What region of the immunoglobulin is used to determine this classification?

Your answerChoose one option.

The constant region of the heavy chain only

The constant region of the light chain only

The variable region of both the heavy and light chains

The constant region of both the heavy and light chains

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Correctly match the cell types in Column I to their primary function in Column II.

Column I: P) Melanocyte Q) Myocyte R) Granulocyte S) B-cell

Column II:

Muscle contraction

Pigment production

Antibody production

Estrogen secretion

Your answerChoose one option.

P – 1; Q – 3; R – 2; S – 4

P – 2; Q – 1; R – 4; S – 3

P – 1; Q – 2; R – 3; S – 4

P – 2; Q – 3; R – 4; S – 1

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Which one or more of the following terms describe(s) Toxoplasma gondii?

Your answerSelect all correct options. You can choose more than one.

Virus

Parasite

Bacteria

Fungus

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The doubling time of Escherichia coli is 30 minutes in a culture medium containing glucose and yeast extract. Phage T7 has a life cycle of 20 minutes and a burst size of 200 phage per infected E. coli cell. Phage absorption is instantaneous and occurs at 1 multiplicity of infection (MOI). Bacteria infected with multiple or single phage give the same burst. 5000 plaque forming units of T7 phage are added to a culture of 2 × 10⁷ E. coli cells.

Assuming normal division, the E. coli culture will lyse completely by _____ full cycles of bacterial division. (Answer in integer)

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Match the molecules in Column-I with their properties/functions mentioned in Column-II

Column-I Column-II P. IgM 1. Involved in antigen presentation Q. IgE 2. Predominant antibody type in various body secretions R. IgA 3. Can pass through placenta S. MHC 4. Associated with allergic reaction 5. Contains ten heavy and light chains

Your answerChoose one option.

P–3 ; Q–2 ; R–4 ; S–5

P–5 ; Q–4 ; R–2 ; S–1

P–2 ; Q–3 ; R–4 ; S–1

P–5 ; Q–4 ; R–2 ; S–5

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Match the following human diseases in Column-I with their causal organism in Column-II.

Column-I: P. Sleeping sickness; Q. Chagas disease; R. Elephantiasis; S. Lyme disease

Column-II: 1. Trypanosoma cruzi; 2. Trypanosoma brucei; 3. Borrelia burgdorferi; 4. Wuchereria bancrofti; 5. Rickettsia rickettsii

Your answerChoose one option.

P–3; Q–1; R–4; S–5

P–1; Q–2; R–3; S–4

P–2; Q–4; R–1; S–3

P–2; Q–1; R–4; S–3

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Which one of the following tissues/organs is least likely to experience graft rejection when transplanted from a person to an unrelated person?

Your answerChoose one option.

bone marrow

cornea

heart

kidney

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Which one or more of the following parasites is/are typically transmitted by mosquitoes as vector?

Your answerSelect all correct options. You can choose more than one.

Leishmania donovani

Plasmodium vivax

Wuchereria bancrofti

Trichuris trichiura

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Which of the following is/are the causative agent(s) of Filariasis?

Your answerSelect all correct options. You can choose more than one.

Wuchereria bancrofti

Leishmania donovani

Brugia malayi

Trypanosoma gambiense

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Match the immunological statements in Column I with the appropriate descriptions from Column II

Column I: P. Active acquired immunity; Q. First line of defense; R. Passive natural immunity; S. Second line of defense

Column II: (i) Complement proteins and interferons; (ii) Direct contact with pathogens that enter the body; (iii) Surface barriers; (iv) Antibodies pass through placenta

Your answerChoose one option.

P – (ii) ; Q – (iii) ; R – (iv) ; S – (i)

P – (iv) ; Q – (iii) ; R – (i) ; S – (ii)

P – (iv) ; Q – (ii) ; R – (iii) ; S – (i)

P – (i) ; Q – (iv) ; R – (iii) ; S – (ii)

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GATE XL Parasitology and Immunology PYQs

How to practice Parasitology and Immunology

Question 86

Question 87

Question 90

Question 83

Question 93

Question 94

Question 86

Question 100

Question 90

Question 96