Question

ATP formation during photosynthesis is known as
A) Phosphorylation
B) Photophosphorylation.
C) Oxidative phosphorylation.
D) Substrate-level phosphorylation

Answer 1

Hint: ATP is an organic compound where they provide energy to the various functions in the cells such as muscle contractions, nerve impulse propagation which is found in all known forms of the life and this ATP is generally referred to as a Molecular unit of currency of the living cell.

Complete answer:
A) Phosphorylation: It is the biochemical process which involves the addition of phosphate to an organic compound, examples for phosphorylation include the addition of phosphate to glucose to produce the glucose monophosphate and the addition of phosphate give rise to adenosine diphosphate, and further phosphorylation results in the production of ATP, where the phosphorylation is carried out through the action of enzymes known as kinases or phosphor transferase.
B) Photophosphorylation: It is the process where the phosphorylation of adenosine diphosphate to ATP occurs in the presence of sunlight, and it is the process that occurs in plants during photosynthesis, where glucose produced in the process of photosynthesis undergoes metabolism and releases the energy, where It is trapped and stored in the form of ATP. And it is of two types based on the flow of electrons, such as cyclic photophosphorylation and noncyclic photophosphorylation.
C) Oxidative phosphorylation: It is the metabolic pathway in which cells use the enzymes to oxidize some nutrients and therefore it releases the chemical energy, and almost all eukaryotic cells which possess mitochondria undergo oxidative phosphorylation because here the electrons are transferred from donors to acceptors such as redox reactions where the released energy is stored and utilized to form ATP.
D) Substrate level phosphorylation: It is the metabolic process where the higher energy molecules are converted to low energy molecules and during this process, some energy is released and this chemical energy is utilized to transfer a phosphoryl group from ADP to ATP.

So, the correct option is B.

Note: Energy utilized for adding the phosphate group to adenosine diphosphate to produce the higher energy molecule such as ATP is called phosphorylation, and based on the source of energy they utilized they are named in several ways, where phosphorylation is one out of them.