The ratio of cytosine to thymine in the sample is 5:1.
As per the known fact, Adenine always binds to thymine via two hydrogen bonds. Also, Guanine always binds to cytosine through three hydrogen bonds. This implies, that number of adenine will be equal to thymine. The number of guanine will also be equal to cytosine.
So, number of adenine = 50
Number of thymine = 50
Total number of adenine and thymine = 50 + 50
Performing addition
Total number of adenine and thymine = 100
Remaining nitrogenous bases = 600 - 100
Performing subtraction
Remaining nitrogenous bases = 500
Number of cytosine = 500 ÷ 2
Performing Division
Number of cytosine = 250
So, ratio of cytosine to thymine = 250:50
Again dividing
Ratio of cytosine to thymine = 5:1
Hence, cytosine to thymine is in the ratio 5:1.
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