Question

Energy currency (reservoir) of the cells is
A)AMP
B)ATP
C)ENA
D)DNA

Answer 1

Cell is the smallest and functional unit of living organisms. It is composed of various cell organelles which use energy to perform various processes.

Complete Answer:
Let us first look into what a cell is before we find the correct option. Cells are a basic and fundamental unit of life. All living organisms are made up of cells and the cells have various cell organelles which carry out life processes.

The different cell organelles are,

Endoplasmic reticulum
Golgi apparatus
Nuclear membrane
Lysosomes
Mitochondria

Option A: AMP or Adenosine monophosphate has a role in cellular metabolic processes. It is present in all life forms and gets interconverted into ATP and/ or ADP. But it is not the energy reservoir of the cell, therefore, this is the incorrect option.
Option B: ATP or Adenosine TriPhosphate is the energy reservoir of the cells. It has three high energy phosphate bonds which are broken down as and when energy is needed by the cell. Therefore, this is the correct option.
When the cell needs energy, the first bond of ATP is broken down and energy is used for cellular needs. It captures chemical energy which is obtained from the breakdown of food molecules and is later on released for cellular processes.
Option C: ENA or European Nucleotide Archive provides comprehensive information about the nucleotide sequencing. It is not the energy reservoir of the cell, therefore, this is the incorrect option.
Option D: DNA or DeoxyriboNucleic Acid is the genetic material present in all humans. It is not the energy reservoir of the cell, therefore, this is the incorrect option.

Hence the correct answer is option 'B'.

Note: The cells require energy for the following processes,

Transportation of ions across membranes.
Muscle contraction.
Chemical synthesis.
Substrate phosphorylation.