Discussion
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- Question
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
- Correct Answer
- the 7-methyl guanosine cap
- 1. 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
- 2. Which is required for protein synthesis?
Options- A. tRNA
- B. mRNA
- C. rRNA
- D. All of these Discuss
- 3. 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 Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. Which of the following amino acids interact with the DNA or RNA backbone (i.e. phosphate)?
Options- A. Ile and Val
- B. Lys and Arg
- C. Leu and Ala
- D. Cys and Met Discuss
- 9. The type II restriction endonucleases, bind to DNA sites
Options- A. using H-bonds for specificity
- B. that are usually palindromic
- C. using non-sequence-dependent backbone interactions
- D. all of the above Discuss
- 10. The enzyme that joins DNA cuts is called
Options- A. joinase
- B. ligase
- C. DNA phosphorylase
- D. reverse transcriptase Discuss
Protein Synthesis problems
Search Results
Correct Answer: 17 amino acids/sec
Correct Answer: All of these
Correct Answer: Transfer RNA
Correct Answer: solely on the basis of their anticodons
Correct Answer: DNA Pol III at a replication fork.
Correct Answer: has a 3'- 5' exonuclease activity
Correct Answer: two 3'-OH ends and two 5'-phosphate ends
Correct Answer: Lys and Arg
Correct Answer: all of the above
Correct Answer: ligase
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