Gene control by transcription factors Quiz
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5 questions, one answer each
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1. What does RNA polymerase do?
- A. Joins amino acids together
- B. Makes an mRNA copy of a gene
- C. Unwinds DNA during replication
- D. Carries amino acids to the ribosome
2. A repressor switches a gene off by:
- A. Cutting the gene out of the DNA
- B. Destroying the mRNA
- C. Preventing RNA polymerase from binding to the promoter
- D. Adding amino acids to the ribosome
3. Why can oestrogen enter a cell without a membrane receptor?
- A. It is lipid-soluble
- B. It is a protein
- C. It is made inside the cell
- D. It is positively charged
4. Which cells respond to oestrogen?
- A. All body cells
- B. Only cells that contain the oestrogen receptor
- C. Only cells that contain the oestrogen gene
- D. Only cells in the nucleus
5. What does the hormone-receptor complex do in the nucleus?
- A. Breaks the DNA
- B. Acts as a transcription factor and binds to the promoter
- C. Translates mRNA
- D. Replicates the chromosome