State whether the following statement is true or false.
Adenosine differs from cytosine because the former is a purine nucleoside while the latter is a pyrimidine nitrogenous base.

True

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False

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Solution

The correct option is A True
Adenosine is a purine nucleoside, consisting of an adenine molecule attached to a ribose sugar via a glycosidic linkage. Cytosine is a pyrimidine nitrogenous base with the heterocyclic aromatic ring.
So, the given statement is True

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Similar questions

Statement 1: The four nitrogen bases in a DNA molecule are guanine, thymine adenine, cytosine.

Statement 2: Where adenine and thymine are purines and guanine and cytosine are pyrimidines.

How many of the following statements are incorrect?

(1) Purine nitrogenous base in a nucleotide is attached to pentose sugar by 1,1 glycosidic linkage.

(2) Adenosine is a nucleoside.

(3) Genome of E. coli possess 4.6 × 10⁹ base pair.

(4) Pitch of DNA helix is 3.4 A⁰.

(5) Euchromatin stains light.

(6) RNA is not more stable than DNA.

(7) RNA can mutate at faster rate than DNA.

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