If A+t= 60% in dna than what will % of G ??

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Answer 1 · 2018-05-24T15:49:54

#G= 20% #

In a cell's DNA, there exists a characteristic pairing of guanosine and cytosine, and adenine and thymine.

Chargaff's rule states that in a cell, #%A = %T#, and #%G = %C#.

If #%A + %T = 60%#,

this leaves #40%# of its DNA complement.

Hence, #%G + %C = 40%#, and by extension

#%G = 20%#

Answer 2 · 2018-05-25T00:18:57

#20%# of guanine

In a #"DNA"# strand, adenine #("A")# only pairs up with thymine #("T")#, and guanine #("G")# only pairs up with cytosine #("C")#.

Therefore, there is an equal amount of #"A"# and #"T"# in a #"DNA"# strand, and also an equal amount of #"G"# and #"C"#.

Here, we are given that:

#"A + T"=60%#

#:."G + C"=100%-60%#

#=40%#

Since they must exist in a #1:1# ratio, the percentage of guanine in this strand is:

#"G"=(40%)/2=20%#