Ask Question
7 October, 21:15

Cytosine makes up 42% of the nucleotides in a sample of dna from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?

+5
Answers (1)
  1. 7 October, 23:14
    0
    8%

    Explanation:

    DNA is a double-stranded molecule made up of nucleotides: A, T, G, and C. According to Chargaff, A + T + G + C = 100%, where Adenine (A) pairs with Thymine (T) while Guanine (G) pairs with Cytosine (C).

    Since G pairs with C and A with T, there must be equal proportions of each nuceleotide pair i. e. A=T, G=C

    If C = 42%, G is also 42%

    We then have, 42 + 42 + A + T = 100

    84 + A + T = 100

    A + T = 100 - 84

    A + T = 16%

    If A and T is collectively 16% and each must contain equal proportion, therefore, A=T = 16/2 = 8%.

    Hence, proportion of Adenine and Thymine in that DNA is 8%.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Cytosine makes up 42% of the nucleotides in a sample of dna from an organism. Approximately what percentage of the nucleotides in this ...” in 📙 Biology if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers