CBSE Class 12 Molecular Basis of Inheritance Multiple Choice Questions with Answers. MCQ Questions Class 12 Molecular Basis of Inheritance with Answers Is Prepared Based on Latest Exam Pattern. Students can solve NCERT MCQ questions Class 12 Molecular Basis of Inheritance with Answers to know their preparation level.
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MCQ Questions Class 12 Molecular Basis of Inheritance with Answers - Set - 3
Question 1:
The experimental proof for semi-conservative replication of DNA was first shown in a
(a) fungus
(b) bacterium
(c) plant
(d) virus.
Correct Answer – (B)
Question 2:
One turn of the helix in a B-form DNA is approximately
(a) 2 nm
(b) 20 nm
(c) 0.34 nm
(d) 3.4 nm.
Correct Answer – (D)
Question 3:
The following ratio is generally constant for a given species:
(a) A + G / C + T
(b) T + C / G + A
(c) G + C / A + T
(d) A + C / T + G
Correct Answer – (C)
Question 4:
The approximate life span of mRNA is
(a) 2 hours
(b) 2 minutes
(c) 2 seconds
(d) None of the above
Correct Answer – (B)
Question 5:
In DNa replication, the primer is
(a) A small deoxyribonucleotide polymer
(b) Small ribonucleotide polymer
(c) Helix destabilising protein
(d) Enzyme taking part in joining nucleotides to their complementary template bases
Correct Answer – (B)
MCQ Questions Class 12 Molecular Basis of Inheritance With Answers
Question 6:
A DNA with unequal nitrogen bases would most probably be
(a) single stranded
(b) double stranded
(c) triple stranded
(d) four stranded
Correct Answer – (A)
Question 7:
In prokaryotes, the genetic material is
(a) linear DNA without histones
(b) circular DNA without histones
(c) linear DNA with histones
(d) circular DNA with histones
Correct Answer – (B)
Question 8:
Topoisomerase is involved in
(a) Producing RNA primer
(b) Joining of DNA segment
(c) Producing nick in DNA
(d) Separation of DNA strands
Correct Answer – (C)
Question 9:
The experimental system used in studies of discovery of replication of DNA has been
(a) Drosophila melanogaster
(b) Pneumococcus
(c) Escherichia Coli
(d) Neurospora crassa
Correct Answer – (C)
Question 10:
As per template theory, amino acid first combines with
(a) tRNA
(b) mRNA
(c) rRNA
(d) DNA
Correct Answer – (A)
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