THE MOLECULAR BASIS OF INHERITANCE
DNA REPLICATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Nucleotides and sugar
|
|
|
Sugar and Phosphates
|
|
|
Sugar and Nucleotide bases
|
|
|
Bases and Phosphates
|
Detailed explanation-1: -A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. 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: -The backbone of a DNA molecule consists of the phosphate groups and the deoxyribose sugars, whereas the base region of the DNA molecule consists of the nitrogenous bases; therefore, the backbone of DNA is made up of phosphate groups and pentose sugars. Adenine is part of the base region of the molecule.
Detailed explanation-3: -Detailed Solution. The backbone of a DNA is made up of repeating units of deoxyribose sugar, nitrogenous base and phosphate group which occur alternately. The phosphate group attaches to the-OH group at the 5’ carbon of the deoxyribose sugar through a phosphodiester linkage.