Question

Protoplasmic respiration is respiration
A. Occurring in protoplasm
B. Controlled by genetic factors
C. Occurring outside the mitochondria
D. Employing proteins as respiratory substrate

Answer 1

Hint: Protoplasmic respiration is a rare type of respiration in which glucose being the simplest monosaccharide hexose molecule acts as the chief respiratory substrate. The substrate used in protoplasmic respiration is the protein when there is shortage of carbohydrates.

Complete answer:
Protoplasmic respiration is a mode of respiration in which the protein is used as a substrate when there is shortage of carbohydrates. The floating respiration is a process of respiration in which common mode of respiration and the substrate used in it is carbohydrates or fat molecules. The substrate acts as a storage material that is hydrolysed for the respiration process. This process of respiration goes on indefinitely throughout the life of the cell and products that are formed are non-toxic. This type of respiration keeps the cell healthy.
Protoplasmic respiration is a respiration in which the protein acts as a substrate in the absence of carbohydrates. The substrate acts as a storage material only in some seeds but in the others, it is part of the protoplasm. This protoplasmic respiration only occurs for some time when carbohydrate or fat is absent during starvation. This type of respiration results in the production of a toxic substance like ammonia which can kill the cells ultimately.

Hence, the correct option is D. Employing proteins as respiratory substances.

Note: The respiration process requires a substrate that can catalyze the respiration process and various substances are used as catalysts in the process of respiration like carbohydrate or fats, etc.