# The protein molecule contains 950 nucleotides with cytosine, accounting for 20% of the total number of nucleotides in this DNA.

The protein molecule contains 950 nucleotides with cytosine, accounting for 20% of the total number of nucleotides in this DNA. Determine the percentage of other nucleotides that make up the DNA molecule. How long is this snippet? We use Chargaff’s rules.
1) C = G = 20%
2) (A + T) = 100 – (20 + 20) = 60%, so A = T = 30%
3) To calculate the number of these nucleotides, we make up the proportion:
20% – 950
30% – X
X = 1425
4) to determine the length of DNA, you need to find out how many nucleotides are contained in one chain:
(950 + 950 + 1425 + 1425): 2 = 2375, then 2375 x 0.34 = 808 (nm).
Answer: A = T = 30%, G = C = 20%, fragment length – 808 nm. Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.