Question

why there is differences in persentage of Guanine 19.5% and cytosine ???

Answer 1

Cytosine should be 19.5% also.

Answer 2

NO its 19.9% why ???

Answer 3

Based on Chargaff's rules, the bases G should equal C, and A should equal T. However, there is a conditional second rule. That is that they roughly equal to each other, and not absolute. So, 19.5% of Guanine is roughly equal to the 19.9% of Cytosine.

Answer 4

This situation involves competition of DNA.

Answer 5

can u explain that for me

Answer 6

how is competition and that is the answer ???

Answer 7

I don't remember exactly but I know hat in some points in the DNA, the molecule forms a loop made with a single strand of DNA (the other strand is not connected) and in this loop, there is some cytosine nucleotides. Isolated, they are not expressed nor connected to guanine, but they are present in DNA.
Do you have a Campbell Biology book ?

Answer 8

yea i have a book ,,, so this is the answer ??

Answer 9

If you have the last Campbell Biology book, this is explained a little bit in a chapter. If I find which chapter, I'll let you know. But Google may be a good friend to speak to.

Answer 10

thx :)

Answer 11

The few bases that are hanging on the DNA strand might be RNA you are referring to. For example tRNA is a transport RNA component that has a few bases hanging off one of the ends. This end is like a loop. The question is asking about the composition of DNA, not isolated bases.

Answer 12

The meaning of competition refers to the variety of DNA strands. This means not all DNA strands are equal, due to competition. So, some DNA strands have bases that are roughly equal to each other in terms of G-C and A-T. That is why the question you asked is based on rough equality, and not absolute equality. This is known as competition because each DNA strand is not always equal.

Answer 13

thank you very much :)