How many Hydrogen bonds are there in a Cytosine-Guanine pair?
Correct answer: D. 3
- A. 0
- B. 1
- C. 2
- D. 3
Explanation
Option A: This option suggests that there are no hydrogen bonds in a Cytosine-Guanine pair. However, in reality, hydrogen bonds do exist between the C and G bases. Option B: This option implies that there is only one hydrogen bond in a Cytosine-Guanine pair. However, the actual number of hydrogen bonds in a C-G pair is three.Option C: This option proposes that there are two hydrogen bonds in a Cytosine-Guanine pair. However, the correct number of hydrogen bonds in a C-G pair is three. Option D: Hydrogen bonds form between the complementary bases in DNA. In the C-G pair, Cytosine forms three hydrogen bonds with Guanine (G), establishing a stable base pairing. The three hydrogen bonds provide significant strength to the DNA double helix structure.
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About Structure of DNA
DNA structure includes nucleotides made of deoxyribose, phosphate and nitrogenous bases, arranged in two antiparallel polynucleotide strands. Questions cover the double helix, phosphodiester and hydrogen bonds, complementary base pairing between adenine and thymine and between guanine and cytosine, and the significance of major and minor grooves.
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