Question

Floating respiration is respiration
A. Occurring in cytosol
B. Using carbohydrate as a substrate
C. Employing fat as a respiratory substrate
D. Both B and C

Answer 1

Hint: When reduced substrates like carbohydrates, fats and proteins are oxidized to release the energy it is known as respiration. Floating respiration is a type of common mode of respiration.

Complete Answer:
- In physiology, respiration is the transfer of oxygen to the cells inside tissues from the outside environment, and the transport of carbon dioxide in the opposite direction. Depending on the nature of the respiratory substrate, Blackman divided respiration into two types namely Floating respiration and Protoplasmic respiration.
- Floating respiration is a form of respiration in which nutrients such as carbohydrate fat or protein is taken from outside the cell or body is digested. The substrate used in floating respiration is fats or carbohydrates.
- The substrate acts as a storing material and is hydrolysed during respiration. It moves indefinitely throughout the life of a cell and does not produce any toxic products and elements. It helps to keep the cells healthy.
- The water-based liquid found inside cells is called cytosol. Cellular respiration takes place in the cytosol.
- Cellular respiration requires cellular respiration and ventilation. There are three levels of aerobic cellular respiration: glycolysis, the cycle of citric acid, and the electron transport chain. As a substrate for the chemical reactions of glycolysis or the citric acid cycle, different nutrients may join respiration.

The correct option is Both B and C.

Note: Another type of respiration is protoplasmic respiration, in which proteins are used as respiratory fuels. In this type, protein is used as a substrate. Toxic products like ammonia are formed which kills the cells ultimately.