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 - 4
Question 1:
A bacterial colony containing DNA made up of 100% N15 nitrogen bases is allowed to replicate in a medium containing N14 bases. After one round of replication the result would be
a) All individuals will be identical to parents
b) All individuals will be hybrids
c) Only 50% individuals would be hybrids
d) All individuals would have DNA made up of 100% N14
Correct Answer – (B)
Question 2:
The removal of which enzyme affects the synthesis of hnRNA in eukaryotes
a) RNA polymerase III
b) RNA primase
c) RNA polymerase II
d) RNA polymerase I
Correct Answer – (C)
Question 3:
If a DNA contains 1000 base pairs, what would be its length?
a) 3400 Å
b) 34000 Å
c) 6800
d) 1000 Å
Correct Answer – (A)
Question 4:
There are special proteins that help to open up DNA double helix in front of the replication fork. These proteins are
(a) DNA ligase
(b) DNA topoisomerase I
(c) DNA gyrase
(d) DNA polymerase I
Correct Answer – (B)
Question 5:
DNA synthesis can be specifically measured by estimating the incorporation of radio-labelled
(a) thymidine
(b) deoxyribose sugar
(c) uracil
(d) adenine
Correct Answer – (A)
MCQ Questions Class 12 Molecular Basis of Inheritance With Answers
Question 6:
What is not True for DNA in prokaryotes
a) present in the form of a compact structure called nucleoid
b) the coils are maintained by non-histone basic proteins
c) found in cytoplasm in a supercoiled condition
d) packaged as nucleosomes along with histones
Correct Answer – (D)
Question 7:
Genes which are active all the time synthesizing substances needed by the cell are called
a) Cellular luxury genes
b) metabolic genes
c) house keeping genes
d) control genes
Correct Answer – (C)
Question 8:
The stretch of codons between AUG and a stop codon is called
a) open reading frame
b) TATA box
c) colinearity
d) degenerate
Correct Answer – (A)
Question 9:
Similarity in DNA and RNA is that
(a) both are polymer of nucleotides
(b) both have similar pyrimidine
(c) both have similar sugar
(d) both are genetic material
Correct Answer – (A)
Question 10:
The final proof for DNA as the genetic material came from the experiments of
(a) Hershey and Chase
(b) Avery, MacLeod and McCarty
(c) Hargobind Khorana
(d) Griffith.
Correct Answer – (A)
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