Extended Response Questions

Module 1 -
Short answer questions

Please answer these questions BEFORE looking at the perfected answers

  1. What is the process that copies a DNA gene in to a complimentary RNA copy? Describe the steps occurring in this process. (2 marks)

2. Describe the steps occurring at the ribosome that results in the formation of a polypeptide. (3 marks)

3. How does tRNA play a role in the production of the protein hormone insulin? (2 marks)

4. Explain the difference between the primary and secondary structure of a protein? (2 marks)

5. Describe what is meant by tertiary and quaternary protein structure. (2 marks)

6. After transcription occurs, the molecule produced is not able to leave the nucleus at first. Explain the process it must undergo before it can leave the nucleus and travel to the ribosome. (2 marks)

7. In some cases, the same proteins can be coded for by different DNA sequences. Explain how this is possible. (2 marks) 

8. B cells produce vast amounts of proteins called antibodies and release them into the blood. B cells have unusually large areas of certain organelles within the cell. Name two of these organelles, and explain why they are present in such large areas? (2 marks)

9. Explain the difference between structural and regulatory genes (2 marks)

10. The trp operon is controlled by a repressor protein. Explain what would happen in terms of gene expression, if tryptophan was present within the cell. (2 marks)

11. The trp operon is controlled by a repressor protein. Explain whether the trp operon would be expressed if tryptophan was absent. Why is this beneficial to the cell? (3 marks)


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