An enzyme that cleaves deoxyribonucleic acid (DNA) at a specific site is called

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ABVD chemotherapy drugs Questions

Question 1 of 5

An enzyme that cleaves deoxyribonucleic acid (DNA) at a specific site is called

Correct Answer: A

Rationale: Restriction endonucleases cleave DNA at specific recognition sites, used widely in molecular biology.

Question 2 of 5

The efficacy rates for nonprescription antifungal agents for vaginal yeast infections is

Correct Answer: D

Rationale: Nonprescription antifungals (e.g., miconazole) have an efficacy rate of about 80% for vaginal yeast infections.

Question 3 of 5

Which of the following herbs is known to cause cancer?

Correct Answer: B

Rationale: Comfrey contains pyrrolizidine alkaloids, which are hepatotoxic and carcinogenic with prolonged use.

Question 4 of 5

Hematological testing of a patient with acquired immune deficiency syndrome (AIDS) is most likely to show which of the following abnormalities?

Correct Answer: C

Rationale: Lymphopenia, particularly of CD4+ T cells, is a hallmark of AIDS due to HIV’s destruction of these cells.

Question 5 of 5

Which statement reageding phasespecific chemotherapeutic agents is correct? They

Correct Answer: A

Rationale: Phase-specific agents target a specific cell cycle phase, unlike alkylating agents or antitumor antibiotics, which are cycle-nonspecific.

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