Question

Energy currency/coin of cell is
A) ATP
B) NAD
C) ADP
D) GDP

Answer 1

Primary energy is the movement of primary resources (such as solar power) or the natural fuels that extract nature’s energy.

Complete Answer:
To make it easy to use, move or store, energy from primary energy sources is also converted into various types. Such types are called currencies of energy. The concept of the energy currency was proposed by many scholars as a way of thinking about these useful intermediate sources of electricity.

Now, let us find the solution from the options-
- ATP accounts for adenosine triphosphate. It is defined as the cell’s energy currency. ATP stands for the triphosphate of adenosine. It is referred to as the cell’s energy currency. To supply energy for many metabolic reactions, it hydrolyzes to inorganic phosphate and ADP.

- A cofactor essential to metabolism is the nicotinamide adenine dinucleotide (NAD). NAD is considered a dinucleotide present in all living cells as it is composed of two nucleotides connected by their phosphate groups. The adenine nucleobase as well as the other nicotinamide include one nucleotide. There are 2 types of NAD: an oxidised and reduced form, referred as $NAD^+$ and NADH. Thus option B is not the correct option.

- As an important organic compound in synthesis, adenosine diphosphate (ADP), recognized as adenosine pyrophosphate (APP), is necessary for the flow of energy in living organisms. ADP comprises three major structural components: a backbone of sugar connected to adenine and two groups of phosphates attached to a 5-carbon ribose atom. Thus, the option C is not the correct option.

- In the economy, energy production and usage play a significant role in both demand and supply, and GDP and energy usage can also be correlated. Broadly speaking, countries with higher GDPs have experienced a type of industrialization, leading to a large proportion of their energy use being used to manufacture products. Thus, option D is not the correct option.

Thus, the correct answer is option (A) ATP.

Note: ATP and AMP can be interconverted into ADP. ATP comprises one more group of phosphates than ADP does. AMP comprises one group of less phosphate. The conversion of energy used by all living organisms is a product of ATP dephosphorylation by enzymes such as ATPases.