Assertion :- Adenine and Guanine are substituated purines.
Reason : In Adenine and Guanine purine hetercylic ring has either amino or amino and oxy groups.

Waste products of adenine and guanine (Purines) metabolism are excreted by man as

Assertion : Amino acid are called alpha -amino acids Reason : Amino acid are organic compound containing an amino goup and a carboxyl group as substituents on the same carbon, i.e., the alpha -carbon.

Answer the following in one word only. Adenine and guanine are grouped under.

Find the odd one out and give reason: Adenine, thymine Uracil, Guanine.

Assertion : Amino acids are called alpha -amino acids. Reason : Amino acids are organic compounds containing an amino group and an acidic group as substituents on the alpha -carbon.

Assertion : Amino acids are called alpha -amino acids. Reason : Amino acids are organic compounds containing an amino group and an acidic group as substituents on the alpha -carbon.

Assertion : Amino acids are called alpha -amino acids. Reason : Amino acids are organic compounds containing an amino group and an acidic group as substituents on the alpha -carbon.

Complete the analogy: Adenine and Guanine : Purine : : Cytosine and Thymine :……………..

Assertion:There is an equal proportion of purines and pyrimidines in DNA. Reason:Adenine links with Thymine and Guanine links with Cytosine.

Assertion : The heterocyclic compounds in nucleic acid are the nitrogenous bases. Reason : Adenine and guanine are substituted pyrimidines while uracil, cytosine and thymine are substituted purines.