Discussion
Home ‣ Microbiology ‣ Translation and Regulation Comments
- Question
Which of the following defines an open reading frame (ORF)?
Options- A. A sequence of genome in bacteriophage
- B. The sequence of a complete genome
- C. A plasmid vector used in genome sequencing
- D. A possible gene predicted by DNA sequencing
- Correct Answer
- A possible gene predicted by DNA sequencing
- 1. Which stop codon has been found to encode selenocysteine?
Options- A. UAA
- B. UAG
- C. UGA
- D. AGA Discuss
- 2. Which binding is inhibited by pactamycin?
Options- A. Aminoacyl-tRNA to the A-site of 30S subunit
- B. Initiator-tRNA to 30S/40S initiation complexes
- C. Peptidyl t-RNA to the 50S subunit
- D. Formation of peptide bond in P site Discuss
- 3. What is the maximum number of different amino acids in a polypeptide chain coded by the synthetic polyribonucleotides (UCAG)5?
Options- A. One
- B. Two
- C. Three
- D. Four Discuss
- 4. 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
- 5. 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
- 6. The final step of gene expression is protein synthesis, which is also known as
Options- A. replication
- B. translation
- C. transcription
- D. none of these Discuss
- 7. Site in the ribosome from which the tRNA donates amino acids to the growing polypeptide chain is
Options- A. P site
- B. O site
- C. T site
- D. A site Discuss
- 8. During amino acid activation a(n)
Options- A. amino acid is bound to tRNA
- B. amino acid is bound to mRNA
- C. methyl group is attached to rRNA
- D. methyl group is attached to an amino acid Discuss
- 9. Which of the following molecule catalyzes the transpeptidation reaction?
Options- A. RNA polymerase
- B. Peptidyl transferase
- C. DNA ligase
- D. DNA polymerase Discuss
- 10. The Shine-Dalgarno sequence is
Options- A. trailer sequence
- B. a stop codon
- C. the reading frame of a gene
- D. a short sequence that acts as a ribosomal binding site Discuss
Translation and Regulation problems
Search Results
Correct Answer: UGA
Correct Answer: Initiator-tRNA to 30S/40S initiation complexes
Correct Answer: Three
Correct Answer: It blocks the binding of amino-acyl tRNA to the A site of ribosomes
Correct Answer: nonsense codons
Correct Answer: translation
Correct Answer: P site
Correct Answer: amino acid is bound to tRNA
Correct Answer: Peptidyl transferase
Correct Answer: a short sequence that acts as a ribosomal binding site
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