Question

Considering the average molecular mass of a base to be $500$ Da, what is the molecular mass of a double stranded DNA of $10$ base pairs?

• A. $500Da$
• B. $5kDa$
• C. $10kDa$
• D. $1kDa$

Answer 1

Answer: (C)

$10kDa$

The average molecular mass of a base is 500 Da. There is a double-stranded DNA having 10 bp which means the total number of bases are 20 bases. So the molecular mass of this DNA segment will be 20 x 500 = 10000 Da = 10 kDa.

Thus, the correct answer is option C.