Question

A bacterial dsDNA molecule, $2988bp$ in length, was found to have the following composition:

	T	C	A	G
Strand I	348	X	348	1400
Strand II	650		650	Y

The respective values of X and Y are :

• A. $1400$ and $590$
• B. $590$ and $1400$
• C. $590$ and $590$
• D. None of the above

Answer 1

The correct option is C $590$ and $590$

As this DNA strand contains 2988 base pairs. So, the total number of nucleotides from strand 1 must be equal to 2988.

So, 348+X+640+1400 = 2988

After solving we get X = 590

Also, the number of cytosine from one strand is equal to guanine from another strand, hence Y = 590.

So, the correct option is '590 and 590'.