Question

In a sample of double-stranded DNA, 40% of the nitrogenous bases are thymine (T).
What percentage of the bases are adenine (A)?

Answer 1

Answer:

40%

Explanation:

This is because, since thymine pairs with adenine, the number will be the same.

Answer 2

Answer:

Option B. 40% is the correct option.

Explanation:

• The DNA contains four nucleotides namely:

1. Adenine (A)  2.Cytosine (C)  3.Thyamine(T)   4.Guanine (G).

• They are found in pairs bonded by hydrogen bonds.
• They have various functions as they carry information and instructions related to DNA replication, RNA transcription, metabolism, and other reactions.
• The rules of pairing are as such that a purine pairs with a pyrimidine.
• The purines are: Adenine and Guanine
• The pyrimidines are: Cytosine and Thymine
• The purine adenine always pairs with the pyrimidine Thymine and forms two hydrogen bonds.
• The other purine Guanine always pairs with the pyrimidine Cytosine forming three hydrogen bonds.
• Therefore, if in a sample of DNA 40% of the nitrogenous bases are thymine it means that the percentage of adenine will also be the same as both nucleotides appear in pair.

For more information:

https://brainly.com/question/2505085