Class XII · Biology practice
Molecular Basis of Inheritance MCQs
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668 questions in this collection · Page 33 of 67
Question 321 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
Genetic code was deciphered by _______ who argued it should be a triplet.
Physicist George Gamow proposed the triplet code.
Question 322 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
Three codons UAA, UAG, and UGA function as _______ codons.
They are the stop/termination codons.
Question 323 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
The codon AUG codes for _______ and also acts as initiator codon.
AUG codes for Methionine.
Question 324 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
Since there are 64 codons for 20 amino acids, the code is _______
Degeneracy means multiple codons code for one amino acid.
Question 325 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
Insertion or deletion of one or two bases results in _______ mutation.
Indels of 1-2 bases shift the reading frame.
Question 326 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
tRNA was formerly called _______ RNA.
tRNA was known as sRNA (soluble RNA).
Question 327 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
tRNA has an _______ loop that has bases complementary to the code.
The anticodon loop binds to the mRNA codon.
Question 328 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
The secondary structure of tRNA looks like a _______
The 2D structure is a clover-leaf.
Question 329 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
The actual 3D structure of tRNA looks like an inverted _______
The 3D structure resembles an inverted L.
Question 330 of 668
📘 CLASS XII
Molecular Basis Of Inheritance
Translation refers to the process of polymerization of _______ to form a polypeptide.
Translation creates a polypeptide chain from amino acids.
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