Discussion
Home ‣ Biochemistry ‣ Protein and Nucleic Acid Interactions Comments
- Question
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
- Correct Answer
- two 3'-OH ends and two 5'-phosphate ends
- 1. 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
- 2. 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
- 3. 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
- 4. Which is required for protein synthesis?
Options- A. tRNA
- B. mRNA
- C. rRNA
- D. All of these Discuss
- 5. 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
- 6. 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
- 7. 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
- 8. The enzyme that joins DNA cuts is called
Options- A. joinase
- B. ligase
- C. DNA phosphorylase
- D. reverse transcriptase Discuss
- 9. Different DNA polymerases play distinct roles in DNA replication and repair in both prokaryotic and eukaryotic cells. All known DNA polymerases synthesize DNA only in the __________ by the addition of dNTPs to a performed primer strand of DNA.
Options- A. positive direction
- B. 3' to 5' direction
- C. 5' to 3' direction
- D. negative direction Discuss
- 10. Which of the following amino acids can interact with the DNA or RNA nucleotide bases via hydrogen bonding?
Options- A. Asn and Gln
- B. Cys and Met
- C. Lys and Leu
- D. Ile and Val Discuss
Protein and Nucleic Acid Interactions problems
Search Results
Correct Answer: has a 3'- 5' exonuclease activity
Correct Answer: the 7-methyl guanosine cap
Correct Answer: 17 amino acids/sec
Correct Answer: All of these
Correct Answer: Transfer RNA
Correct Answer: Lys and Arg
Correct Answer: all of the above
Correct Answer: ligase
Correct Answer: 5' to 3' direction
Correct Answer: Asn and Gln
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