Statement
A.The four nucleotide bases are not necessarily present in DNA in exact equal proportions
B.The total amount of purines are equal to the total amount of pyrimidines
C.DNA ligase enzyme act to hydrolyse or breakdown a polynucleotide chain into its component nucleotides
D. Nuclease enzymes are capable of restoring an intact DNA duplex of the above statements

Options

A. B is correct but A, C and D are wrong
B. A and B are wrong but C and D are correct
C. A, B and C are correct but D is wrong
D. A and B are correct but C and D are wrong

Answer

D

Explanation

The amount of each nucleotide in a DNA considerably varies in an organism.
`underset("(Amount of Purine)") (A + G) = underset("(Amount of pyrimidne)") (T + C)`
DNA ligase helps in joining the nucleotides by the formation of hydrogen bond in a polynucleotide chain.
Nuclease enzyme is capable to cleave duplex DNA at specific site