Hormones and gene expression Quiz
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5 questions, one answer each
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1. What does a transcription factor do?
- A. Joins amino acids together
- B. Binds to DNA and switches transcription of a gene on or off
- C. Carries amino acids to the ribosome
- D. Copies the whole genome
2. Why do peptide hormones bind to receptors on the cell surface?
- A. They are lipid-soluble
- B. They are very small
- C. They cannot cross the phospholipid bilayer
- D. They are made in the nucleus
3. Which statement about steroid hormones is correct?
- A. They bind to receptors on the cell-surface membrane
- B. They always work faster than peptide hormones
- C. They only affect proteins that already exist
- D. They diffuse into cells and the hormone-receptor complex can act as a transcription factor
4. A cell has no receptor for a particular steroid hormone. What is the most likely result of adding the hormone?
- A. The cell makes more mRNA
- B. The hormone turns into a peptide
- C. No effect, because no hormone-receptor complex forms
- D. The cell dies
5. Why is the response to a peptide hormone faster than to a steroid hormone?
- A. It does not need the transcription and translation of a gene to make new protein
- B. Peptide hormones are bigger
- C. It acts in the nucleus
- D. It needs no receptor