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Molecular Biology Mock Test

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ABOUT THIS MOCK TEST 

🟥 TOPIC : Molecular Biology 

🟥 NUMBER OF QUESTIONS : 20

🟥 TIME : 20 MINS

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67

Molecular Biology Mock Test

🟥 QUESTIONS : 20

🟥 TIME : 20 MINS

1 / 20

1)

156. Identify the correct order of organisation of genetic
material from largest to smallest.
(a) Genome, chromosome, gene, nucleotide
(b) Chromosome, genome, nucleotide, gene
(c) Chromosome, gene, genome, nucleotide
(d) Genome, chromosome, nucleotide, gene (2015)

2 / 20

2)

Expressed Sequence Tags (ESTs) refers to
(a) novel DNA sequences
(b) genes expressed as RNA
(c) polypeptide expression
(d) DNA polymorphism. (NEET 2019)

3 / 20

3)

Match the following genes of the Lac operon with
their respective products.
(A) i gene (i) b-galactosidase
(B) z gene (ii) Permease
(C) a gene (iii) Repressor
(D) y gene (iv) Transacetylase
Select the correct option.
(A) (B) (C) (D)
(a) (iii) (iv) (i) (ii)
(b) (i) (iii) (ii) (iv)
(c) (iii) (i) (ii) (iv)
(d) (iii) (i) (iv) (ii) (NEET 2019)

4 / 20

4)

The first phase of translation is
(a) binding of mRNA to ribosome
(b) recognition of DNA molecule
(c) aminoacylation of tRNA
(d) recognition of an anti-codon. (NEET 2020)

5 / 20

5)

Which one of the following is the starter codon?
(a) UAA (b) UAG
(c) AUG (d) UGA (NEET-I 2016)

6 / 20

6)

Under which of the following conditions there will be
no change in the reading frame of following mRNA?
5’ AACAGCGGUGCUAUU 3’
(a) Deletion of GGU from 7th, 8th and 9th positions
(b) Insertion of G at 5th position
(c) Deletion of G from 5th position
(d) Insertion of A and G at 4th and 5th position

7 / 20

7)

Which of the following rRNAs acts as structural
RNA as well as ribozyme in bacteria?
(a) 5S rRNA                   (b) 18S rRNA
(c) 23S rRNA                (d) 5.8S rRNA
(NEET-II 2016)

8 / 20

8)

Match the following RNA polymerase with their
transcribed products :
1. RNA polymerase I (i) tRNA
2. RNA polymerase II (ii) rRNA
3. RNA polymerase III (iii) hnRNA
Select the correct option from the following :
(a) 1-i, 2-iii, 3-ii (b) 1-i, 2-ii, 3-iii
(c) 1-ii, 2-iii, 3-i (d) 1-iii, 2-ii, 3-i
(Odisha NEET 2019)

9 / 20

9)

Name the enzyme that facilitates opening of DNA
helix during transcription.
(a) DNA ligase                             (b) DNA helicase
(c) DNA polymerase                  (d) RNA polymerase
(NEET 2020)

10 / 20

10)

Which of the following RNAs should be most abundant
in animal cell?
(a) tRNA                     (b) mRNA
(c) miRNA                 (d) rRNA (NEET 2017)

11 / 20

11)

During replication of a bacterial chromosome DNA
synthesis starts from a replication origin site and
(a) RNA primers are involved
(b) is facilitated by telomerase
(c) moves in one direction of the site
(d) moves in bidirectional way. (2004)

12 / 20

12)

During DNA replication, Okazaki fragments are
used to elongate
(a) the lagging strand towards replication fork
(b) the leading strand away from replication fork
(c) the lagging strand away from the replication fork
(d) the leading strand towards replication fork.
(NEET 2017)

13 / 20

13)

Which one of the following is not applicable to
RNA?
(a) Heterocyclic nitrogenous bases
(b) Chargaff’s rule
(c) Complementary base pairing
(d) 5’ phosphoryl and 3’ hydroxyl ends (2015)

14 / 20

14)

Select the correct match.
(a) Ribozyme - Nucleic acid
(b) F2 × Recessive parent - Dihybrid cross
(c) T.H. Morgan - Transduction
(d) G. Mendel - Transformation
(NEET 2018)

15 / 20

15)

The experimental proof for semi-conservative
replication of DNA was first shown in a
(a) fungus                        (b) bacterium
(c) plant                           (d) virus. (NEET 2018)

16 / 20

16)

Transformation was discovered by
(a) Meselson and Stahl                   (b) Hershey and Chase
(c) Griffith                                         (d) Watson and Crick.
(2014

17 / 20

17)

A molecule that can act as a genetic material must
fulfill the traits given below, except
(a) it should be able to express itself in the form of
‘Mendelian characters’
(b) it should be able to generate its replica
(c) it should be unstable structurally and chemically
(d) it should provide the scope for slow changes
that are required for evolution. (NEET-II 2016)

18 / 20

Taylor conducted the experiments to prove semiconservative
mode of chromosome replication on
(a) Vinca rosea

18) (b) Vicia faba

(c) Drosophila melanogaster

(d) E. coli.                                                           (NEET-II 2016)

19 / 20

19)

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. (NEET 2017)

20 / 20

20)

Which of the following statements is correct?
(a) Adenine pairs with thymine through two H-bonds.
(b) Adenine pairs with thymine through one H-bond.
(c) Adenine pairs with thymine through three H-bonds.
(d) Adenine does not pair with thymine.
(NEET 2020)

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Molecular Biology Mock Test

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