Discussion
Home ‣ Microbiology ‣ Translation and Regulation Comments
- Question
What is the direct cause of cell death by diphtheria toxin?
Options- A. Formation of an ion channel in the cell membrane
- B. Inactivation of a translational elongation factor
- C. Induction of apoptosis
- D. None of the above
- Correct Answer
- Inactivation of a translational elongation factor
- 1. The interaction between the mRNA and tRNA determined the position of amino acid in a polypeptide sequence. This is called the
Options- A. stagerivity
- B. Wobble hypothesis
- C. promiscuity
- D. adaptor hypothesis Discuss
- 2. Which of the following lacks 3'-5' exonuclease activity?
Options- A. Short fragment of DNA polymerase I
- B. Taq DNA polymerase
- C. T4 DNA ligase
- D. All of the above Discuss
- 3. Both strands of DNA serve as templates concurrently in
Options- A. replication
- B. excision repair
- C. mismatch repair
- D. none of these Discuss
- 4. In E.coli, which enzyme synthesizes the RNA primer for Okazaki fragments?
Options- A. DnaA
- B. DnaC
- C. DnaG
- D. all of these Discuss
- 5. Which of the following repairs nicked DNA by forming a phosphodiester bond between adjacent nucleotides?
Options- A. Helicase
- B. DNA gyrase
- C. Topoisomerases
- D. DNA ligase Discuss
- 6. When was the genetic code completed?
Options- A. 1958
- B. 1952
- C. 1966
- D. 1968 Discuss
- 7. The ribosome binding site
Options- A. forms a stem-loop structure in the RNA
- B. is located upstream of the promoter sequence
- C. is located immediately upstream of the start codon
- D. is more likely to be associated with an operon than with a gene encoding a single protein Discuss
- 8. Which of the following act as the blueprint or template for the process of protein synthesis that takes place on ribosomes?
Options- A. rRNA
- B. DNA
- C. tRNA
- D. mRNA Discuss
- 9. Three stop codons, which aids in termination of translation are also known as
Options- A. pause codons
- B. nonsense codons
- C. missense codons
- D. antisense codons Discuss
- 10. What is the action of tetracycline in prokaryotes?
Options- A. It blocks translocation reaction on ribosomes
- B. It blocks peptidyl transferase reaction on ribosomes
- C. It blocks the binding of amino-acyl tRNA to the A site of ribosomes
- D. Not known with certainity Discuss
Translation and Regulation problems
Search Results
Correct Answer: adaptor hypothesis
Correct Answer: All of the above
Correct Answer: replication
Correct Answer: DnaG
Correct Answer: DNA ligase
Correct Answer: 1966
Correct Answer: is located immediately upstream of the start codon
Correct Answer: mRNA
Correct Answer: nonsense codons
Correct Answer: It blocks the binding of amino-acyl tRNA to the A site of ribosomes
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