THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Hydrogen
|
|
|
Phosphate group
|
|
|
Nitrogenous base
|
|
|
Hydroxyl group
|
Detailed explanation-1: -The 3′-end (three prime end) of a strand is so named due to it terminating at the hydroxyl group of the third carbon in the sugar-ring, and is known as the tail end.
Detailed explanation-2: -A nucleic acid strand is inherently directional, and the “5 prime end” has a free hydroxyl (or phosphate) on a 5’ carbon and the “3 prime end” has a free hydroxyl (or phosphate) on a 3’ carbon (carbon atoms in the sugar ring are numbered from 1’ to 5’; ).
Detailed explanation-3: -Any single strand of DNA/RNA will always have an unbound 5’ phosphate at one end and an unbound 3’ hydroxyl group at the opposite end.
Detailed explanation-4: -While DNA contains deoxyribose, RNA contains ribose, characterised by the presence of the 2′-hydroxyl group on the pentose ring (Figure 5).
Detailed explanation-5: -The DNA has a 5’ end and a 3’ end. The 5’ end has a phosphate group at the end while the 3’ group contains the hydroxyl group.