Protein Synthesis MCQs | Protein Synthesis Multiple Choice Questions and Answers

Questions
1 Conversion of messages carried by mRNA into amino acid sequences is called___________
A Translation
B Transcription
C Replication
D DNA repair

Answer: Translation
2 The following set of RNA is required in the translation process except one, mark the INCORRECT?
A tRNA
B mRNA
C rRNA
D Si RNA

Answer: Si RNA
3 Name the sequence of RNA, which is recognized by a small subunit of the ribosome.
A Shine Dalgarno sequence
B Rho utilization site
C Upstream sequence
D Downstream sequence

Answer: Shine Dalgarno sequence
4 Which of the following is considered as a start codon?
A AGG
B GUG
C UAG
D AUG

Answer: AUG
5 Mark the one, which is NOT a stop codon?
A GGA
B UAG
C UAA
D UGA

Answer: GGA
6 Which of the following recognize a specific amino acid and its cognate t-RNA molecule?
A t-RNA synthetase
B Topoisomerase
C Ribososme
D r-RNA

Answer: t-RNA synthetase
7 Which of the following inhibitor block translation in eukaryotes?
A Tetracycline
B Puromycin
C Cyclohexamine
D None of these

Answer: Cyclohexamine
8 Name the drug which inhibits the initiation step of translation.
A Streptomycin
B Cyclohexamine
C Tetracycline
D Ricin

Answer: Streptomycin
9 What is correct for protein synthesis?
A DNA coding takes place in antiparallel fashion
B codes transfer on tRNA
C coding is done by DNA strands
D codes transfer on mRNA

Answer: codes transfer on mRNA
10 Reverse transcriptase is
A RNA dependent DNA polymerase
B RNA dependent RNA polymerase
C DNA dependent DNA polymerase
D DNA dependent RNA polymerase

Answer: RNA dependent DNA polymerase
11 Which of the following inactivates the 60S subunit of eukaryotic ribosomes?
A Ricin
B Chloramphenicol
C Diphtheria toxin
D Cycloheximide

Answer: Ricin
12 Which is the third elongation step in bacteria?
A Translocation
B Binding of an incoming aminoacyl t-RNA
C Peptide bond formation
D None of above

Answer: Translocation
13 The role of mRNA in protein synthesis is
A It provides genetic blueprint for the protein
B It catalyzes the process
C It translates genetic code to a specific amino acid
D It modifies mRNA molecules prior to protein synthesis

Answer: It provides genetic blueprint for the protein
14 The role of small nuclear RNAs in protein synthesis is
A It modifies mRNA molecules prior to protein synthesis
B It translates genetic code to a specific amino acid
C It provides genetic blueprint for the protein
D It catalyzes the process

Answer: It modifies mRNA molecules prior to protein synthesis
15 The eukaryotic mRNA binding to the ribosomes is facilitated by
A 7-methyl guanosine cap
B Shine Dalgarno sequence
C T-RNA
D Poly-A tail

Answer: 7-methyl guanosine cap
16 Which of the following blocks the peptidyl transferase of 80S eukaryotic ribosomes?
A Cycloheximide
B Ricin
C Diphtheria toxin
D Chloramphenicol

Answer: Cycloheximide
17 Protein synthesis refers to the
A process of formation of amino acids from mRNA
B process of formation of amino acids directly from a DNA template
C process of formation of mRNA from DNA template
D Process of duplicating DNA required for protein synthesis

Answer: process of formation of amino acids from mRNA
18 Which of the following is not a requirement for protein synthesis?
A Spliceosome
B Ribosomes
C peptidyl transfrase
D amino acyl-tRNA synthetase

Answer: Spliceosome
19 Which is the source of energy for amino acid activation?
A ATP
B TTP
C GTP
D All the above

Answer: ATP
20 Which of the following statement is correct?
A Activated amino acid binds to the 5’ end of respective tRNA molecule
B there is only one amino acyl-tRNA synthetase in a cell
C CTP is required for amino acid activation
D Termination codon has no tRNA

Answer: Termination codon has no tRNA
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