Antibodies and Immune System MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Antibodies and Immune System, a fundamental topic in the field of Microbiology. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Antibodies and Immune System MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Antibodies and Immune System mcq questions that explore various aspects of Antibodies and Immune System problems. Each MCQ is crafted to challenge your understanding of Antibodies and Immune System principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Microbiology tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Antibodies and Immune System MCQs are your pathway to success in mastering this essential Microbiology topic.

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Antibodies and Immune System MCQs | Page 10 of 14

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Q91.
The ability of CTP to bind to aspartate carbamoyltransferase and shut down the synthesis of more CTP is an example of

a.

enzyme induction

b.

enzyme repression

c.

feedback inhibition of enzyme activity

d.

none of these

Discuss
Answer: (c).feedback inhibition of enzyme activity
Q92.
Oxidation is the

a.

loss of proton

b.

gain of electron

c.

loss of electron

d.

gain of protons

Discuss
Answer: (c).loss of electron
Q93.
Denaturation of an enzyme refers to the

a.

improper arrangement of the enzyme in a metabolic pathway

b.

loss of the enzymes proper shape

c.

formation of the enzymes proper shape

d.

formation of a new isozyme for that enzyme

Discuss
Answer: (b).loss of the enzymes proper shape
Q94.
The class of immunoglobulins which can cross the placenta is

a.

IgM

b.

IgG

c.

IgA

d.

IgD

Discuss
Answer: (b).IgG
Q95.
Self reactive antibodies are not found in significant concentration in normal serum because

a.

it is impossible to generate a self-reactive antibody

b.

self reactive B cells are killed by CD8 T cells

c.

B cells that are stimulated via their surface bound antibody in the absence of T cell help to commit suicide

d.

self reactive B cells switch to IgA which is all secreted and not present in serum

Discuss
Answer: (c).B cells that are stimulated via their surface bound antibody in the absence of T cell help to commit suicide
Q96.
Simulation of which of the following will lead to appearance of first antibody to appear following stimulation by an antigen?

a.

IgM

b.

IgA

c.

IgE

d.

IgG

Discuss
Answer: (a).IgM
Q97.
Antigen binding sites of an immunoglobulin are located in

a.

light chain alone

b.

heavy chain alone

c.

Fc region of the antibody

d.

Fab regions of the antibody

Discuss
Answer: (d).Fab regions of the antibody
Q98.
Which of the following mediates Type I hypersensitivity reaction?

a.

IgE

b.

IgG

c.

IgM

d.

IgD

Discuss
Answer: (a).IgE
Q99.
If person's own defense mechanism produces antibodies against infection or vaccination, immunity is termed as

a.

Defense mechanism

b.

Active immunity

c.

Passive immunity

d.

Drug therapy

Discuss
Answer: (b).Active immunity
Q100.
Urine culture is used, when a person is suspected with a disease, known as

a.

Cystitis

b.

Whooping cough

c.

Fever

d.

Pneumonia

Discuss
Answer: (a).Cystitis
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