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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

Which of these are a type of mutation?

A. base substitution

B. translocation

C. insertion sequences

D. recombination

Expert Explanatory Rationale

Correct Answer: recombination

Question 2 of 5

Which of the following statements is NOT true

A. During T cell development the decision to become a CD4 or a CD8 positive cell is a random event

B. During T cell differentiation the decision to become a TH1 or a TH2 cell CD4+ is a random event

C. TH2 CD4+ cells secrete IL-4

D. IL-10 is TH2 polarizing cytokine

Expert Explanatory Rationale

Correct Answer: During T cell differentiation the decision to become a TH1 or a TH2 cell CD4+ is a random event

Question 3 of 5

The physician plans to prescribe trastuzumab (Herceptin) for the patient with breast cancer. What testing will the physician order before prescribing this medication?

A. HER2 protein levels

B. BRCA2 gene mutation

C. BRCA1 gene mutation

D. Stage II cancer identification

Expert Explanatory Rationale

Correct Answer: HER2 protein levels

Question 4 of 5

When a B-cell undergoes immunoglobulin class switching

A. the variable region of the light chain changes, but its constant region remains the same

B. the variable region of the light chain remains the same, but its constant region changes

C. the variable region of the heavy chain remains the same but its constant region changes

D. the variable region of the heavy chain changes but its constant region remains the same

Expert Explanatory Rationale

Correct Answer: the variable region of the heavy chain remains the same but its constant region changes

Question 5 of 5

For the patient with allergic rhinitis, which therapy should the nurse expect to be ordered first?

A. Corticosteroids

B. Immunotherapy

C. Antipruritic drugs

D. Sympathomimetic/decongestant drugs

Expert Explanatory Rationale

Correct Answer: Sympathomimetic/decongestant drugs

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