Discussion
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- Question
Amino acids are joined together into a protein chain by which of the following?
Options- A. Transfer RNA
- B. DNA polymerase
- C. Hydrogen bonds
- D. Messenger RNA
- Correct Answer
- Transfer RNA
- 1. Ribosomes select the correct tRNAs
Options- A. then bind to the appropriate mRNA
- B. solely on the basis of their anticodons
- C. depending on their abundance in the cytosol
- D. with the least abundant anticodons Discuss
- 2. Processive synthesis is a characteristic feature of
Options- A. all DNA polymerases.
- B. DNA Pol III at a replication fork.
- C. removal of RNA primers on Okasaki fragments.
- D. DNA mismatch repair Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. Which is required for protein synthesis?
Options- A. tRNA
- B. mRNA
- C. rRNA
- D. All of these Discuss
- 7. Protein synthesis rates in prokaryotes are limited by the rate of mRNA synthesis. If RNA synthesis occurs at the rate of 50 nucleotides/sec, then rate of protein synthesis occurs at
Options- A. 10 amino acids/sec
- B. 17 amino acids/sec
- C. 25 amino acids/sec
- D. 50 amino acids/sec Discuss
- 8. Eukaryotic mRNA binding to the ribosomes is facilitated by __________ .
Options- A. the Shine Dalgarno sequence
- B. the 7-methyl guanosine cap
- C. tRNA
- D. poly A tail Discuss
- 9. Reverse transcripase from HIV does not
Options- A. uses RNA as a template
- B. has a 5' to 3' polymerase activity
- C. has a 3'- 5' exonuclease activity
- D. requires a primer Discuss
- 10. Cleavage of DNA by EcoRI endonuclease results in the formation of
Options- A. two 3'-OH ends and two 5'-phosphate ends
- B. one 3'-OH end and one 5'-phosphate end
- C. two 3'-phosphate ends and two 3'-OH ends
- D. one 3'-OH end and two 5'-phosphate end Discuss
Protein Synthesis problems
Search Results
Correct Answer: solely on the basis of their anticodons
Correct Answer: DNA Pol III at a replication fork.
Correct Answer: ATP synthesis.
Correct Answer: encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
Correct Answer: from the P site to the A site on the ribosome
Correct Answer: All of these
Correct Answer: 17 amino acids/sec
Correct Answer: the 7-methyl guanosine cap
Correct Answer: has a 3'- 5' exonuclease activity
Correct Answer: two 3'-OH ends and two 5'-phosphate ends
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