Which of the following processes would TYPICALLY be carried out by these lymphocytes?

Question

B lymphocytes are involved in the human immune response to a bacterial infection.

Which of the following processes would TYPICALLY be carried out by these lymphocytes?

I. Cell division by mitosis

II. Transcription producing mRNA

III. Engulfing and digesting bacteria

1. A. I and II only (Correct answer)
2. B. III only
3. C. I and III only
4. D. I only

Correct Answer

Option A — I and II only

Detailed Solution & Explanation

The correct answer is I and II only.

Key Points

• B lymphocytes undergo clonal expansion by mitosis (I) and produce antibody proteins requiring transcription of immunoglobulin genes to mRNA (II).
• B cells do NOT typically engulf and digest bacteria - that is performed by phagocytes (macrophages, neutrophils).