Question

Number of hydrogen linkages in an AT base pair and GC base pair of a DNA molecule are ______ and _____ respectively.
Select the option which fills the blanks correctly.

• A. $2,3$
• B. $3,3$
• C. $1,1$
• D. $3,2$

Answer 1

The correct option is A $2,3$

The number of hydrogen linkages in an AT base pair and GC base pair of a DNA molecule is 2 and 3 respectively.

A DNA molecule consists of four nitrogenous bases namely adenine, thymine, guanine, and cytosine. The nitrogenous base adenine is bonded to thymine by the means of two hydrogen bonds and the guanine is bonded to cytosine by 3 hydrogen bonds.

So, the correct answer is '2, 3'.