Question

In ATP, a high energy bond is present between
A. Nucleoside and phosphate group
B. Sugar and phosphate group
C. Base and phosphate group
D. None of the above

Answer 1

The energy currency in a cell is referred to as $ATP$ [Adenosine triphosphate]. This $ATP$ is a type of nucleotide produced by combining adenine with triphosphate and ribose sugar as a nitrogen base. In cells where energy production is necessary, the $ATP$ is present through the breaking of the bonds.

Complete answer:
There are three groups of phosphates present in $ATP$, of which one phosphate is directly attached to the ribose through the phosphate ester bond and is a low energy bond. The bond between the two phosphate groups is known as the phosphorus anhydride bond, and it is a high-energy bond. Since phosphate and oxygen are the constituents of the $ATP$, the high energy content of this molecule is due to two strong phosphate bonds known as phosphoanhydride bonds in the $ATP$ molecule. These anhydride bonds are often referred to as high energy bonds based on biochemical reactions.
The $ATP$ is known as the cell's energy currency. It has 3 phosphates, one of which is linked to the ribose directly with a phosphate ester connection and is a low energy connection, and it is a low energy bond. $ATP$ has two phosphoanhydride bonds with high energy.
So, choice D- None of the above is the correct answer.

Note: The energy of the bond is also known as mean bond enthalpy or mean bond enthalpy. It is used in a chemical bond to measure the strength of the bond. It can also be stated that this bond energy is the average value of the gaseous phase, the bond-dissociation energy, present in all bond forms of related chemical species.