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Free download in PDF Protein Synthesis Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Conversion of messages carried by mRNA into amino acid sequences is called___________
[A]
Translation
[B]
Transcription
[C]
Replication
[D]
DNA repair
(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
(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
(5)
Mark the one, which is NOT a stop codon?
[A]
GGA
[B]
UAG
[C]
UAA
[D]
UGA
(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
(7)
Which of the following inhibitor block translation in eukaryotes?
[A]
Tetracycline
[B]
Puromycin
[C]
Cyclohexamine
[D]
None of these
(8)
Name the drug which inhibits the initiation step of translation.
[A]
Streptomycin
[B]
Cyclohexamine
[C]
Tetracycline
[D]
Ricin
(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
(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
(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
(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
(19)
Which is the source of energy for amino acid activation?
[A]
ATP
[B]
TTP
[C]
GTP
[D]
All the above
(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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