Protein Synthesis Quiz | Protein Synthesis Objective Type Questions and Answers

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Questions
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
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23 The amino acids are assembled into polypeptide chains on
A Ribosome
B DNA Template
C Mrna
D Nucleus

Answer: Ribosome
24 Which of the following release factor recognizes stop codons UGA and UAA?
A RF2
B RF3
C Sigma factor
D RF1

Answer: RF2
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

Answer: 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

Answer: 70S
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

Answer: Watson and Crick
31 Name the inhibitor which blocks translation in both prokaryotes as well as eukaryotes?
A Puromycin
B Streptomycin
C Chlorophenicol
D Tetracyclinee

Answer: Puromycin
32 Bacteria have
A 80S ribosomes
B 60S ribosomes
C 50S ribosomes
D None of above

Answer: 70S ribosomes
33 Which of the following catalyzes ADP-ribosylation of a diphthamide residue?
A Diphtheria toxin
B Cycloheximide
C Chloramphenicol
D Ricin

Answer: Diphtheria toxin
34 Which of the following inhibits initiation at higher concentrations?
A Streptomycin
B Diphtheria toxin
C Chloramphenicol
D Ricin

Answer: Streptomycin
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

Answer: both a and b
39 In eukaryotes transcription occurs
A Cytoplasm
B Cytosol
C Nucleus
D All the above

Answer: Nucleus
40 Antibiotic inhibiting translation in eukaryotes is
A Puromycin
B Tetracycline
C Pencillin
D Chloromycin

Answer: Puromycin

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