Help me with the answers: 23. Compared to the response to antigen exposure, the

ID: 300478 • Letter: H

Question

Help me with the answers:

23. Compared to the response to antigen exposure, the secondary response

a. Does not require memory B cells

b. Develops more slowly

c. Is a more effective defense against antigens

d. Shows a slower increase in antibody titers

24. Which of the following statements about B cells is incorrect?

a. B cells attack and kill cells infected with viruses by secreting perforin

b. B cells can differentiate into plasma cells

c. B cells account for ~ 10-15% of circulating lymphocytes

d. B cells can become cells that secrete antibodies

25. Interferons _______________.

a. Slow the spread of viral infections

b. Are small proteins

c. Stimulate NK cell activity

d. All of the above are correct

26. There are ______ classes of antibody molecules

a. Three

b. Five

c. Seven

d. Two

Answere :

Question 23 : The correct option is (c) i.e. secondary response is a more effective defense against antigen.

Question 24 : The incorrect statement about B cell is option (a) i.e. B cell attack and kill cells infected with virus by secreting perforin.

Question 25 : The correct option is (d) i.e. All above statement about interferons are correct.

Question 26 : The correct option is (b) i.e. There are five type of antibody i.e. IgA, IgD, IgE, IgG and IgM.

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