BIOMOLECULES AND ENZYMES

BIOLOGY

NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The sugar that is in the backbone of DNA is called
A
fructose
B
ribose
C
glucose
D
deoxyribose
Explanation: 

Detailed explanation-1: -DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

Detailed explanation-2: -DNA contains deoxyribose as the sugar component and RNA contains the sugar ribose.

Detailed explanation-3: -The sugar in DNA is called a deoxyribose because it doesn’t have a hydroxyl group at the 2’ position. Instead it just has a hydrogen.

Detailed explanation-4: -The term “deoxy” refers to the fact that there is no oxygen attached to the 2’ carbon atom. There is a molecule that is similar to DNA but has an oxygen atom at this position. Its sugar is therefore called ribose and its name is ribonucleic acid or RNA.

Detailed explanation-5: -Deoxyribose. Explanation: DNA stands for “deoxyribonucleic acid.” The backbone of DNA is comprised of alternating sugar and phosphate units, in which the sugar is deoxyribose. The backbone of RNA is also comprised of sugar and phosphate units, but uses the sugar ribose.

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