BIOLOGY
NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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4
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20
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16
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64
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Detailed explanation-1: -Five different types of trinucleotide repeats are present in the transcripts of 16 genes known to be associated with TREDs.
Detailed explanation-2: -How many different trinucleotides can be constructed using any of the four nitrogenous bases found in DNA? 64; “Trinucleotide” refers to a three nucleotides sequence.
Detailed explanation-3: -Hydrogen bonds between the bases keep the two strands together, with adenine forming a base pair with thymine and cytosine forming a base pair with guanine. 3.4 Å is occupied by every base pair (2 nucleotides). Therefore, 1700/3.4 = 500 base pairs or 1000 nucleotides occur in a DNA segment with a length of 1700 Å.
Detailed explanation-4: -There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).