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Protein Synthesis (Post-test)

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For each of the following questions select the best answer.

1. Which of the following correctly describes Central Dogma (or the flow of genetic information) in biology:
a. DNA-Transcription-RNA-Translation-Protein
b. DNA- Translation-RNA- Transcription-Protein
c. RNA-Transcription-DNA-Translation-Protein
d. DNA-Transcription-Protein-Translation-RNA
e. RNA-Transcription-Protein-Translation-DNA
2. Which of the following correctly describe combinations of name and functions of RNA molecules important in Translation:
a. mRNA: adaptor between RNA and amino acids
b. tRNA: code for proteins
c. rRNA: form basic structure of ribosome; catalyze protein synthesis
d. Both a. and b.
e. All of the above
3. Secretory proteins are:
a. Always synthesized by floating cytoplasmic ribosomes
b. Commonly synthesized by ribosomes on the rough endoplasmic reticulum (rER)
c. Post-translationally processed in the Endoplasmic reticulum and Golgi
d. Both a. and c.
e. Both b. and c.
4. Which of the following statements about synthesis and sorting of secretory proteins is/are true:
a. They are synthesized in vesicles or granules
b. They have specific signal sequences that target them to the ER
c. They have specific protein sequences that direct their transport from ER to Golgi but never from Golgi to ER
d. They may be glycosylated only in the Golgi
e. All of the above
5. The synthesis of insulin involves:
a. Cleaving the signal peptide of Preproinsulin in the ER
b. Forming disulfide links in the ER
c. Cleaving the C-peptide in the Golgi
d. All of the above
e. None of the above