11.  A Codon is made up of

A. Single nucleotide

B. two nucleotides

C. three nucleotides

D. Four nucleotides

Answer : Option C

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12.  Nucleus of a cell is the site of Synthesis of

A. DNA

B. m - RNA

C. t - RNA

D. All

Answer : Option D

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13.  DNA replication requires

A. DNA polymerase only

B. DNA polymerase and ligase

C. Ligase only

D. RNA polymerase

Answer : Option B

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14.  The enzyme involved in transcription is

A. RNA polymerase

B. DNA polymerase I

C. DNA polymerase II

D. DNA polymerase III

Answer : Option A

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15.  Enzymes needed for formation of repliction fork

A. RNA polymerase and DNA polymerase I

B. Helicase and gyrase

C. Hexokinase and aldolase

D. Ligase and endo nuclease

Answer : Option B

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16.  Okazaki fragments are Synthesized on

A. Leading strands of DNA only

B. Lagging Strands of DNA only

C. Leading and LaggingStrands

D. Complementary DNA Strand

Answer : Option B

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17.  Which of the following is used in DNA multiplication?

A. RNA polymerase

B. DNA endonuclease

C. DNA exonuclease

D. DNA Polymerase

Answer : Option D

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18.  t - RNA attaches aminoacid at its

A. \(3^{1}\) end

B. \(5^{1}\) end

C. Anticodon

D. Loop

Answer : Option A

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19.  DNA acts as a template for synthesis of

A. RNA

B. DNA

C. Both ‘a’ and ‘b’

D. Protein

Answer : Option C

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20.  Antiparallel strand in DNA is due to

A. Disulphide linkage

B. Hydorgen bond

C. Phosphodiester bond

D. Ionic bond

Answer : Option C

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