BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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70%
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30%
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40%
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20%
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Detailed explanation-1: -Thus, in the DNA of an organism, if guanine is 20% cytosine also will be 20%. So, both adenine and thymine together will be 60%, i.e. 30% adenine and 30% thymine. Q. In DNA of certain organisms, guanine constitutes 20% of the bases.
Detailed explanation-2: -So, for this DNA sequence, C + G = 60%. The remaining 40% of the sequence must consist of A-T pairs (adenine-thymine). Therefore, 20% of the sequence is made up of adenine, and 20% of the sequence is made up of thymine.
Detailed explanation-3: -Thymine – 30%, Guanine – 20%, Cytosine – 20%. Chargaff’s nitrogen base pairing rule which states that amount of adenine is equal to thymine and guanine is equal to cytosine.
Detailed explanation-4: -If a double stranded DNA has 20% Thymine, the percentage of Guanine in the DNA. No worries!