BIOMOLECULES AND ENZYMES

BIOLOGY

NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the minimum number of hydrogen bonds in a length of DNA containing 900 base pairs?
A
450
B
900
C
1800
D
2700
Explanation: 

Detailed explanation-1: -As one pair of bases could contain minimum of 2 hydrogen bonds (from A-T pair) and maximum of 3 hydrogen bonds (from G-C pair), the minimum number of hydrogen bonds in a length of DNA containing 700 base pairs will be 700 x 2 = 1400 hydrogen bonds.

Detailed explanation-2: -What is the number of hydrogen bonds in ab dna of 1000 base pairs with base adenine occuring 75%of the time in one strand and 10% in the other strand? ans 2150.

Detailed explanation-3: -Each base pair is composed of at least two interbase hydrogen bonds (H-bonds).

Detailed explanation-4: -The maximum number would be if the entire length of DNA would contain G-C. This means 700 pairs of G-C. 2100 Hydrogen bonds is the maximum number.

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