1.

(A) Guanine unites with Cytosine but not with Thymine. (R) Guanine and Cytosine are purine bases while Thymine is a pyrimidine base.

Answer»

Both A & R are true, R is the CORRECT explanation of A
Both A & R are true, R is not correct explanation of A
A is true, R is false
A is false, R is true

Answer :C


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