Question

A researcher working with nucleic acids found out that the cytosine content in a mRNA molecule was 30%. What will be the content of Adenine?
(a)20%
(b)30%
(c)40%
(d) Can’t be deduced

Answer 1

Answer:

20%

Explanation:

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Answer 2

A researcher working with nucleic acids found out that the cytosine content in an mRNA molecule was 30%. the content of Adenine is (a) 20%

• In RNA, four bases are adenine, guanine, uracil and cytosine.
• Adenine binds with thiamine while guanine binds with cytosine.
• Adenine forms two hydrogen bonds with thiamine while guanine forms three hydrogen bonds with cytosine.
• Total DNA content is 100%.
• Adenine = uracil and guanine = cytosine = 30%.
• So, let adenine = x%
• Then, x + x + 30% + 30% = 100%
• 2x = 100-60= 40%
• x =
• $\frac{40}{2} = 20\%$