Question

______________ is the process of synthesis of ATP from ADP and Pi in the presence of light.
A. Phosphorylation
B. Photophosphorylation
C. Photosystem
D. Oxidative phosphorylation

Answer 1

The living organism needs energy to perform different functions required to sustain their life for development, growth and reproduction. The several biological activities are dependent on energy The ATP molecules are high energy molecules that fuels the living systems.

Complete answer:
ATP or adenosine triphosphate is an important biomolecule that is utilized by living organisms to derive energy for performance of different biological processes and functions. It is referred to as the energy currency of the cell that is present in different metabolic activities. The ATP molecules in living organisms are formed in the mitochondria and chloroplast. ATP molecules are formed by the addition of phosphate group, Pi, to the ADP molecules.
The process through which the phosphorylation or addition of phosphate group to ADP which is converted into ATP takes place in the presence of light energy and is known as photophosphorylation. It takes place during the process of photosynthesis in the plant cells. In the chloroplast, during the photosynthetic process, the ADP molecules are phosphorylated and convert into ATP. This process takes place in the presence of sunlight. As the process of synthesis molecules of ATP from ADP and Pi molecules takes place in presence of light, it is known as photophosphorylation. In plants, photophosphorylation takes place through cyclic photophosphorylation and non-cyclic photophosphorylation.
The addition of phosphate groups to the ADP molecules to synthesize ATP molecules is called phosphorylation and this reaction takes place in the mitochondria.
The metabolic pathway through which the cells utilize the enzymes to oxidize substances and release the chemical energy to produce adenosine triphosphate or ATP is known as oxidative phosphorylation.
The photosystems are the units of protein complexes that are involved in the process of photosynthesis and function to absorb the light energy and transfer the electrons.

Hence, the correct answer is option (B).

Note: The process through which synthesis of ATP from ADP and Pi takes place in the presence of light is called photophosphorylation. It takes place in the chloroplasts of the plants during the process of photosynthesis. This process takes place in the presence of sunlight or light energy.