BIOMOLECULES AND ENZYMES

BIOLOGY

NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many bonds are between guanine and cytosine?
A
1
B
2
C
3
D
4
Explanation: 

Detailed explanation-1: -It is a truth universally acknowledged that a guanine–cytosine (GC) base pair has three hydrogen bonds whereas adenine–thymine (AT) has two.

Detailed explanation-2: -The Adenine-Thymine base pair is held together by 2 hydrogen bonds while the Guanine-Cytosine base pair is held together by 3 hydrogen bonds.

Detailed explanation-3: -STATEMENT-1 : Guanine unites with cytosine with three hydrogen bonds but it forms only one hydrogen bond with thymine.

Detailed explanation-4: -Usually three classes are distinguished: weak, moderate, and strong bonds, with energetic boundaries at about 2 and 15 kcal/mol. The weak hydrogen bonds involve less polar X-H groups in proton donors, like C-H or P-H groups, or less polar acceptors, like the N2 molecule in the N2⋯HF complex discussed above.

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