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.

Question

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. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Nucleic acids are polynucleotides. A nucleotide has three chemically distinct components. One is a heterocyclic compound, the second is a monosaccharide and the third a phosphoric acid or phosphate. The heterocyclic compounds in nucleic acids are the nitrogenous bases named adenine, guanine, uracil, cytosine and thymine. Adenine and guanine are substituted purines while the rest are substituted pyrimidines formed from the skeletal heterocyclic rings purine and pyrimidine, respectively.

Q. 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.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Q. 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.