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Free download in PDF Protein Synthesis Objective Type 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.
(21)
The preinitiation complex in prokaryotes include
[A]
Intiation factors, mRNA, 30 S subunit, GTP
[B]
Intiation factors, mRNA, 30 S subunit, 50 S subunit, ATP
[C]
Intiation factors, mRNA, 50 S subunit, GTP
[D]
Intiation factors, 30 S subunit, 50 S subunit, ATP
Answer: Intiation factors, mRNA, 30 S subunit, GTP
(22)
Translocation in protein synthesis begins with the
[A]
movement of dipeptidyl tRNA from A-site to P-site
[B]
movement of tRNA from A-site to P-site
[C]
movement of tRNA from P-site to A-site
[D]
movement of tRNA from P-site to E-site
Answer: movement of dipeptidyl tRNA from A-site to P-site
(23)
The amino acids are assembled into polypeptide chains on
[A]
Ribosome
[B]
DNA Template
[C]
Mrna
[D]
Nucleus
(24)
Which of the following release factor recognizes stop codons UGA and UAA?
[A]
RF2
[B]
RF3
[C]
Sigma factor
[D]
RF1
(25)
Teminism is
[A]
Reverse transcription
[B]
DNA replication
[C]
RNA replication
[D]
None of these
Answer: Reverse transcription
(26)
During trancription, RNA polymerase binds to DNA site
[A]
Receptor
[B]
Enhancer
[C]
Regulator
[D]
Promoter
(27)
Which one is correct matching?
[A]
anticodon- site of tRNA having complementary bases to a codon of mRNA
[B]
transcription- synthesis of protein
[C]
translation- process of mRNA carrying information from nucleus to ribosome
[D]
None of these
Answer: anticodon- site of tRNA having complementary bases to a codon of mRNA
(28)
What is the size of the prokaryotic ribosome?
[A]
70S
[B]
60S
[C]
80S
[D]
40S
(29)
Which of the following is not true to the nature of the genetic code?
[A]
Codons are overlapping
[B]
Codons are commaless
[C]
Codons are universal
[D]
Codon is triplet
Answer: Codons are overlapping
(30)
Who explained the wobble hypothesis?
[A]
Watson and Crick
[B]
Nirenberg
[C]
Darwin
[D]
Samuel B. Weiss
31
Name the inhibitor which blocks translation in both prokaryotes as well as eukaryotes?
[A]
Puromycin
[B]
Streptomycin
[C]
Chlorophenicol
[D]
Tetracyclinee
32
Bacteria have
[A]
80S ribosomes
[B]
60S ribosomes
[C]
50S ribosomes
[D]
None of above
33
Which of the following catalyzes ADP-ribosylation of a diphthamide residue?
[A]
Diphtheria toxin
[B]
Cycloheximide
[C]
Chloramphenicol
[D]
Ricin
34
Which of the following inhibits initiation at higher concentrations?
[A]
Streptomycin
[B]
Diphtheria toxin
[C]
Chloramphenicol
[D]
Ricin
35
The enzyme involved in activation of serine is
[A]
seryl-tRNA synthetase
[B]
peptidyl transfrase
[C]
amino acyl-tRNA synthetase
[D]
peptide polymerase
Answer: seryl-tRNA synthetase
36
Peptide bond formation between amino acids of growing polypeptide chain is catalysed by
[A]
peptide polymerase
[B]
Peptidyl synthetase
[C]
amino acyl-tRNA synthetase
[D]
peptidyl transfrase
Answer: peptidyl transfrase
37
Peptidyl transfrase involved in peptide bond formation is located in the
[A]
larger subunit of ribosome
[B]
smaller subunit of ribosome
[C]
3’ region of tRNA
[D]
Near Shine Dalgarno sequence
Answer: larger subunit of ribosome
38
Which of the following elongation factor is called as translocase?
[A]
EFG
[B]
EF2
[C]
both a and b
[D]
EF-Tu and EF-Ts
39
In eukaryotes transcription occurs
[A]
Cytoplasm
[B]
Cytosol
[C]
Nucleus
[D]
All the above
40
Antibiotic inhibiting translation in eukaryotes is
[A]
Puromycin
[B]
Tetracycline
[C]
Pencillin
[D]
Chloromycin
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