Respuesta :
Answer:
G - 21%
T - 29%
A - 29%
Explanation:
Nucleotide bases in DNA are complementary. Adenosine (A) binds to Thymine (T) while Cytosine (C) binds to Guanine (G). Hence the composition of A in DNA is the same as that of T; and that of C is the same as that of G.
From the information given, C is 21%
Therefore G is also 21% of the genome as C is bound to G, the therefore are the same proportion.
C and G make up 42% of the genome (that 21% + 21%).
The remaining 58% (100%-42%) is made up of A + T
Similarly the proportion of A is equal to that of T,
Hence A is 29% (half of 58%) and T is 29%.
Answer:
C- 21%
G- 21%
A - 29%
T - 29%
Explanation:
Four nucleotides make up the DNA molecule, and the sum of all four nuceleotides must equal 100% i.e.
A + G + C + T = 100%
If A -T and G - C pairs in the DNA, it means they each nucleotide must contain same proportion as its complementary pair. Therefore, if C is 21%, G is Al 21%.
Hence, 21 + 21 = 42%
We are left with the proportion of the other two nucleotides (A and T). We find it by saying 100 - 42 = 58%
Hence, if A and T must contain equal proportion, each will contain 58/2 = 29%.
The proportions of the four nuceleotides are 21, 21, 29 and 29 % for C, G, A and T respectively.