Which immunoglobulin is the first to be produced during an immune response?

IgM is the first antibody class produced during the initial stages of an immune response.

When compared to the first immune response to the same antigen, which of the following is not a hallmark of the secondary immune response?

Antibody is generated fast

Many antibodies is produced

Antibody is generated without T-cell help

Antibody produced has a greater affinity for the antigen

Which of the following is not a feature of secondary immune respone to an antigen when compared to the first immune response to the same antigen?

Antibody is generated without T-cell help

Antibody is generated fast

Antibody produced has greater affinity for the antigen

Much antibody is produced

In an experiment you develop immune response in mice against salmonella flagellar antigen. However, you observe the infection still persisted. Which if a likely possibility if immune system is functioning properly?

Salmonella shed its flagella

The antigen lost its specificity gradually

The flagella antigen changed

Infection was not due to salmonella

In case of acquired immune system, a secondary immune response is generated by the ______________

memory B-cells

germ cells

lymphoid tissues

antigens

Determine the correctness or otherwise of the following Assertion (A) and Reason (R).
Assertion: An antigen recognized by one immunoglobulin subtype is not recognized by any other subtype.
Reason: Immunoglobulin subtypes differ from each other both in the variable and in the constant regions.

Both (A) and (R) are true and (R) is the correct reason for (A)

Both (A) and (R) are true but (R) is not the correct reason for (A)

Both (A) and (R) are false

(A) is true but (R) is false

Assertion (A): All the systems which exhibit overshoot in transient response will also exhibit resonance peak in frequency response. Reason (R): Large resonance peak in frequency response corresponds to a large overshoot in transient response.

Both A and R are true and R is the correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

Which of the following are dependent variable conditioning experiment?
1. Latency of response
2. Rate of response
3. Amplitude of response
4. Direction of response
Select the correct answer

Both 1 and 2

Both 3 and 4

1, 2 and 3

2, 3 and 4

In MATLAB, the impulse response of the step response of a system is ___ to the step response of the impulse response of the system.

Equal

Not Equal

Greater

Lesser

Referring to the bellow figure, determine the voltage level that the output will reach during the pulse.

0 V

15 V

6.3 V

9.45 V

Which of the following cells are involved in innate immune responses as well as adaptive immune responses?

Dendritic cells

Natural Killer cells

Macrophages

Neutrophils