Question

ATP is
A. Nucleotide
B. Nucleoside
C. Purine base
D. Nucleosome

Answer 1

Hint: Nucleotides are organic molecules consisting of a nucleoside and a phosphate.

Step by step answer:ATP, or adenosine triphosphate, is the method of energy storage and transfer in the body. It consists of one molecule of adenine, one ribose sugar, and one to three phosphate groups. If the bond between the second and third phosphate groups is broken, energy is released, and this energy powers our cells.
In combination with thymine or uracil, it codes for amino acids. But in order to decrease the reactivity of the phosphate groups, which I think is probably the most important reason, adenine, and ribose (adenosine when combined) were added. In ATP, it no longer codes for amino acids, but rather keeps the molecule stable.
A Nucleotide consists of a phosphate group, sugar unit, nitrogen base. The nitrogen base & sugar unit forms nucleoside. When the phosphate group attaches to it forms a nucleotide.
A nucleotide is composed of three distinctive chemical sub-units: a five-carbon sugar molecule, a nitrogenous base — which two together are called a nucleoside, and one phosphate group.
The cell cannot store ATP and the synthesis of ATP must constantly be regulated in relation to the need.
ATP is the most important energy form for all organisms and can be said to be the cell’s energy currency.
ATP is not a storage molecule for chemical energy; that is the job of carbohydrates, such as glycogen, and fats. ATP then serves as a shuttle, delivering energy to places within the cell where energy-consuming activities are taking place.
Hence, the correct answer is Option A

Note: This is a ‘family’ of molecules that includes both the building blocks of DNA and RNA and molecules that serve as a source of energy for cellular reactions.