Question

Select the correct option:

Refer to the given reactions.
(i) Adenine + X$\to$ Adenosine
(ii) Adenosine+ Y$\to$ Adenylic acid
What does X and Y represent here?

• A. X - Phosphate group
  Y - Sugar molecule
• B. X - Sugar molecule
  Y - Phosphate group
• C. X - Sugar molecule
  Y - Nitrogenous base
• D. X - Nitrogenous base
  Y - Sugar molecule

Answer 1

The correct option is B X - Sugar molecule

Y - Phosphate group
The coumpounds given here are the moleciles of the nucleic acids.

A nucleotise is the structure which forms when a sugar and a nitrogenous base is joined.

A nucleotide is a structure which forms whne a phosphrc acids bond with nucleoside.

Any nitrogenous base with prefix -sine is a nucleoside and -ylic acid is a nucleotide.

So, the correct option is 'X - Sugar molecule and Y - Phosphate group'