Question

A single strand of DNA helix consists of 100 nitrogenous base pairs. On one strand, 36 of the bases are adenine and 24 are cytosine. For the complimentary strand of DNA, which would complete the proper base pairing?

Answer 1

thymine and guanine
Bcz The sequence of nitrogenous bases run in such form like ATGC. ....ATGC.
this is the arrangement of bases on DNA

Answer 2

Answer: The correct answer is Thymine and Guanine.

In a double helical structure of DNA, there are two complementary strands. These strands have complementary base pairs according to Watson and Crick base pairing, which says that-

• Adenine pairs with Thymine with the help of two hydrogen bonds.
• Guanine pairs with Cytosine with the help of three hydrogen bonds.

Thus, DNA with one strand having 36 Adenine and 24 cytosine will be having 36 Thymine and 24 Guanine ( in complementary strand) in order to complete the proper base pairing.