Question

Assertion (A): Cellular organisation of the body is the defining feature of life forms.
Reason (R): Isolated metabolic reactions are living reactions.

• A. Both A and R are correct, and R is the correct explanation for A
• B. Both A and R are correct, but R is not the correct explanation for A
• C. Only A is correct
• D. Both A and R are incorrect

Answer 1

The correct option is B Both A and R are correct, but R is not the correct explanation for A

Metabolism is the sum total of all the chemical reactions that occur in a body, which is a characteristic feature of life. Every living organism including plants, animals, fungi, and microbes exhibit metabolism whereas non-living objects do not perform metabolism. Metabolism can take place in a cell-free environment like a test tube, outside the living body which is known as isolated metabolism. Even though, these reactions that happen in-vitro are non-living things, they are living reactions.

The interractions and coordinations of different metabolic reations inside a cellular system form the basis of every life forms. Hence, the defining feature of life form is the cellular organization of the body along with all the metabolic reactions that take place, not the isolated motabolic reaction.