Question No:1
In a post-transcriptional modification, capping adds an unusual nucleotide like
[A] Guanosine triphosphate
[B] Methyl gunanine triphosphate
[C] Methyl guanosine triphosphate
[D] Adenosine triphosphate
Question No:2
In a post-transcriptional modification called tailing, _______ residues are added at the _____of mRNA.
[A] Adenylate, 5’ – end
[B] Guanylate, 3’ – end
[C] Adenylate, 3’ -end
[D] Guanylate, 5’ -end
Question No:3
mRNA is in fact
[A] Unprocessed rRNA
[B] Unprocessed hnRNA
[C] Processed hnRNA
[D] Processed mRNA itself
Question No:4
A physicist, George Gamow, argued that genetic code is a combination of _____ nucleotides.
[A] three
[B] two
[C] four
[D] one
Question No:5
Humans requires _____ codons to synthesize 20 amino acids,
[A] 64 codons
[B] 61 codons
[C] 62 codons
[D] 60 codons
Question No:6
The chemical method developed by _____ was instrumental in synthesizing RNA molecules with defined combination of bases.
[A] Marshal Nirenberg
[B] George Gamow
[C] Har Gobind Khorana
[D] F.H.C. Crick
Question No:7
_____ cell-free system for protein synthesis finally helped the genetic code to be deciphered,
[A] George Gamow’s
[B] Marshall Nirenberg’s
[C] Har Gobind Khorana’s
[D] J.D. Watson’s
Question No:8
Some amino acids are coded by more than one codon. Hence the genetic code exhibits
[A] Specificity
[B] Selectivity
[C] Degeneracy
[D] Regenerancy
Question No:9
The codon AUG has dual function as it codes for _____ and also acts as a _____ codon.
[A] phenylalanine, initiator
[B] methionine, terminator
[C] methionine, regulator
[D] methionine, initiator
Question No:10
Sickle cell anaemia is a classic example of
[A] Frame shift mutation
[B] Point mutation
[C] Deletion mutation
[D] Duplication mutation
Question No:11
In sickle cell anaemia, which amino acid modification occurs in the x-chain of amino acid?
[A] Valine -> Glutamate
[B] Threonine -> Valine
[C] Tyrosine -> Glutamate
[D] Glutamate ->Valine
Question No:12
tRNA was earlier called
[A] Adapter molecule
[B] Special RNA
[C] Protein carrying RNA
[D] Soluble RNA
Question No:13
For the initiation of translation process, specific tRNAs involved are known as
[A] Helper t-RNA
[B] Assistor t-RNA
[C] Initiator t-RNA
[D] Terminal t-RNA
Question No:14
The process of polymerization of amino acids to polypeptide is known as
[A] Pepto-polymerization
[B] Transcription
[C] Translation
[D] Transformation
Question No:15
Charging of tRNA is also known as
[A] Acylation
[B] Transmination
[C] Amino allylation
[D] Amino acylation
Molecular Basis of Inheritance Model Test-7
CategoriesNEET Biology