Discussion
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- Question
The growing polypeptide chain is released from the ribosomes when
Options- A. a chain terminating codon is reached
- B. a chain terminating tRNA binds to the ribosome
- C. the 7-methyl guanosine cap is reached
- D. the poly A tail is reached
- Correct Answer
- a chain terminating codon is reached
- 1. Which site of the tRNA molecule binds to the mRNA molecule?
Options- A. Anticodon
- B. Codon
- C. Amino acid
- D. 5 prime end Discuss
- 2. Type I proteins (plasma membrane) have a
Options- A. cleavage N- terminal signal sequence and a hydrophobic stop transfer sequence
- B. cleavaged N- terminal signal sequence that doubles as the membrane anchoring sequence
- C. multiple signal sequence and a hydrophobic stop transfer sequence
- D. multiple signal sequence that doubles as the membrane anchoring sequence Discuss
- 3. On the ribosome, mRNA binds
Options- A. between the subunits
- B. to the large subunit
- C. to the small subunit
- D. none of these Discuss
- 4. A polysome could be best described as
Options- A. an active site of DNA synthesis.
- B. an active site of protein synthesis.
- C. an active site of lipid synthesis.
- D. all of the above. Discuss
- 5. Which of the following RNAs bind to an amino acid?
Options- A. mRNA
- B. tRNA
- C. rRNA
- D. hnRNA Discuss
- 6. Signal peptide protein removal that is translocated across a membrane is accomplished by
Options- A. fMet aminopeptidase
- B. trypsin
- C. signal peptidase
- D. chymotrypsin Discuss
- 7. The structure in a bacterium that indicates an active site for protein synthesis is
Options- A. a chromosome.
- B. a cell membrane,
- C. a flagellum.
- D. a polysome. Discuss
- 8. The direction of amino acid transfer to the growing polypeptide chain is
Options- A. from the A (aminoacyl tRNA site) site to the P (peptidyl tRNA site) site on the ribosome
- B. from the P site to the A site on the ribosome
- C. from the A site to the E (exit tRNA site) site on the ribosome
- D. from the P site to the E site on the ribosome Discuss
- 9. The lac operon contains the z, y and a structural genes
Options- A. encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
- B. encoding p-galactosidase and galactose permeases
- C. encoding P-galactosidase only
- D. None of the above Discuss
- 10. Phosphorus is taken up by the cell during the process of
Options- A. carbohydrate synthesis.
- B. protein synthesis,
- C. lipid synthesis.
- D. ATP synthesis. Discuss
Protein Synthesis problems
Search Results
Correct Answer: Anticodon
Correct Answer: cleavage N- terminal signal sequence and a hydrophobic stop transfer sequence
Correct Answer: to the small subunit
Correct Answer: an active site of protein synthesis.
Correct Answer: tRNA
Correct Answer: signal peptidase
Correct Answer: a polysome.
Correct Answer: from the P site to the A site on the ribosome
Correct Answer: encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
Correct Answer: ATP synthesis.
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