Free Printable Molecular Biology

1.

The circular and double stranded DNA occurs in

a)

Golgi body

b)

Mitochondria

c)

Nucleus

d)

Cytoplasm

2.

Initiation codon of prokaryotes for protein synthesis represents amino acid

a)

Methionine

b)

Formylated methionine

c)

Arginine

d)

Lysine

3.

A DNA molecule in which both strands have radioactive thymidine is allowed to duplicate in an environment containing non-radioactive thymidine. What will be the exact number of DNA molecules that contains the radioactive thymidine after three duplications

a)

One

b)

Two

c)

Three

d)

Four

4.

Polymorphism in DNA sequences is the basis of

a)

PCR

b)

Transcription

c)

Genetic mapping of human genome and DNA fingerprinting

d)

DNA sequencing

5.

In bacteria, catalytic RNA is found in

a)

50S subunit of ribosome

b)

60S subunit of ribosome

c)

30S subunit of ribosome

d)

40S subunit of ribosome

6.

Which among the following rRNA is formed by DNA dependent RNA polymerase in Prokaryote

a)

28s

b)

18s

c)

5s

d)

5.8s

7.

In DNA fingerprinting, detection of hybridized DNA fragments is possible by

a)

Electrophoresis

b)

Blotting

c)

Centrifugation

d)

Autoradiography

8.

The Okazaki fragments in DNA chain

a)

Polymerize in the 5’-3’ direction

b)

Polymerize in the 3’-5’ direction

c)

Result in transcription

d)

Prove semiconservative nature of DNA replication

9.

In process of replication, deoxyribonucleoside triphosphates

a)

Acting as substrate

b)

Provide energy for polymerization

c)

Acting as an enzyme

d)

Both a and b

10.

Which histone protein is not a part of nucleosome:-

a)

H₂A

b)

H₂B

c)

H₃ & H₄

d)

H₁

Molecular Biology

Total questions: 10

Worksheet time: 10mins

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