17.4

6 Written Questions

1. D) Only A and C are true.
2. B) Translation can begin while transcription is still in progress.
3. B) a signal-recognition particle that brings ribosomes to a receptor protein in the ER membrane.
4. D) to translocate polypeptides across the ER membrane
5. C) It introduces a premature stop codon into the mRNA.
6. A) point

5 Multiple Choice Questions

1. D) THECATATTHERAT
   1. Which of the above is analogous to a single substitution mutation?
   2. Which of the above is analogous to a frameshift mutation?
   3. Which of the following is (are) true about RNA?
   4. Which of the following is not related to ribosomal activity?
2. A) a base-pair deletion
   1. Which of the following DNA mutations is the most likely to be damaging to the protein it specifies?
   2. Which of the following statements are true about protein synthesis in prokaryotes?
   3. Which of the following is not related to ribosomal activity?
   4. Of the following types of mutations, which one is likely to be the most common?
3. B) a base deletion near the start of a gene
   1. Which of the above is analogous to a frameshift mutation?
   2. Which of the above is analogous to a single substitution mutation?
   3. Which point mutation would be most likely to have a catastrophic effect on the functioning of a protein?
   4. Which of the following DNA mutations is the most likely to be damaging to the protein it specifies?
4. B) spliceosome
   1. Which of the following is (are) true about RNA?
   2. Which of the following is not related to ribosomal activity?
   3. Which of the above is analogous to a frameshift mutation?
   4. What is the effect of a nonsense mutation in a gene?
5. B) as soon as transcription has begun
   1. What are polyribosomes?
   2. What is one function of a signal peptide?
   3. When does translation begin in prokaryotic cells?
   4. What is the effect of a nonsense mutation in a gene?

5 True/False Questions

1. Of the following types of mutations, which one is likely to be the most common? → A) point mutation

   True        False

2. What are polyribosomes? → D) to translocate polypeptides across the ER membrane

   True        False

3. Which of the following does not occur during the termination phase of translation? → B) spliceosome

   True        False

4. Which of the above is analogous to a single substitution mutation? → C) THECATARETHERAT

   True        False

5. A frameshift mutation could result from → E) either an insertion or a deletion of a base.

   True        False