Question

Choose incorrect statement about photosynthesis
a. It is a physio-chemical process
b. Oxygen Is evolved as a byproduct in all photosynthetic organisms
c. Occurs in unicellular and multicellular photoautotrophs
d. Anabolic and reductive process

Answer 1

Hint: The process of photosynthesis involves the biological organisms to carry out the process and the formation of food and oxygen as the end product of the process are obtained by the help of the chemical reactions. The process is carried out in the absence of oxygen.

Complete answer:
During the process of photosynthesis the light energy coming from the sunlight is captured by the receptors present in the leaf of the plant and that energy is utilized in driving a chemical reaction in which carbon dioxide collected from the outside environment is taken up by the plants through stomata is transformed into glucose by the help of energy from light and using water as another substrate. This glucose then formed is utilized by the plants as the food source for carrying out the other metabolic process of the plants. Now if we say that the plants also produce oxygen because of which all other organisms respire, that oxygen is produced as a byproduct of the photosynthesis process along with the glucose.

If the organisms are a phototroph then it surely carries out the photosynthesis and it does not depend upon the cellular level of the organism. The requirement of oxygen in carrying a process is called an oxidative process and the reactions which do not require oxygen are called reductive processes.

Since there are no physical processes which are occurring in the photosynthesis, we can say that the option a is the right answer as photosynthesis is a biochemical process.

Hence, the correct answer is option (A).

Note: The processes in which a compound is formed by the joining or accumulation of many small compounds are known as an anabolic process and the one in which the formation of the compound takes place by the breakdown of a bigger compound are known as metabolic processes.