Bacteria, viruses and infection Quiz
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5 questions, one answer each
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1. Which of the following is found in both HIV and lambda phage?
- A. A lipid envelope
- B. A cell wall
- C. Ribosomes
- D. A protein capsid
2. Which enzyme makes a DNA copy of the RNA genome of HIV?
- A. Lysozyme
- B. Amylase
- C. Reverse transcriptase
- D. DNA ligase
3. A virus makes new particles at once and then the host cell bursts. This is the:
- A. Latent cycle
- B. Lytic cycle
- C. Lysogenic cycle
- D. Prophage stage
4. Why is TB hard for macrophages to destroy?
- A. The bacteria have a waxy mycolic acid wall that resists lysosomal digestion
- B. It has no cell wall
- C. It is a virus
- D. It lives only outside cells
5. Why does a fall in helper T cells lead to opportunistic infections?
- A. T cells make antibiotics
- B. The immune response is not co-ordinated or activated, so pathogens are not controlled
- C. T cells are the only cells that make mucus
- D. Bacteria need T cells to grow