| I. The four nucleotide basis are not necessarily present in DNA in exact equal proportions. |
| II. The total amount of purines is equal to the total amount of pyrimidines. |
| III. DNA ligase enzyme act to hydrolyse or breakdown a polynucleotide chain into its component nucleotide. |
| IV. Nuclease enzyme are capable of restoring an intact DNA duplex of the above statements. |
A) I and II are incorrect, but III and IV are correct
B) I and II are correct, but IV and III are incorrect
C) II is correct, but I III and IV are incorrect
D) II, III and IV are correct but I is incorrect
Correct Answer: B
Solution :
Statements I. and II are correct. III. DNA ligase enzyme joins the two nucleotides together. IV. Nuclease is an enzyme capable of cleaning the phosphodiester bonds between the nucleotide subsunits of nucleic acids.
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