Question

Anaerobic respiration takes place in
A. mitochondrion
B. nucleus
C. cytoplasm
D. vacuole

Answer 1

Hint: It is a jelly like substance found in the space between the cell membrane and the nucleus. It provides a medium for the cell organelles to remain suspended.

Complete Answer:
Respiration is the process through which we can breathe in and breathe out. Like animals, plans can also respire. Cellular respiration is the process through which organisms break down glucose into a form that the cell can use as energy.
There are two types of respiration: anaerobic respiration and aerobic respiration.
(I) Aerobic respiration occurs in the presence of oxygen while anaerobic respiration occurs when the oxygen is not present. Glucose breaks down without oxygen in anaerobic respiration. The chemical reaction moves the energy from glucose to the cell.
(II) Anaerobic respiration produces lactic acid, not carbon dioxide and water.

- Aerobic stages of cellular respiration in eukaryotes occur in organelles called mitochondria. These aerobic stages are the Krebs cycle and the transport chain of electrons. So, the mitochondrion has aerobic respiration.
- Most organisms cannot breathe without oxygen, but certain cells and tissues can still breathe when oxygen is out. Anaerobic respiration occurs only in the cell cytoplasm.
- Cytoplasm is the jelly-like substance that covers the space between the plasma membrane and the nucleus. In anaerobic respiration, glucose is not entirely split, but much less ATP is released than during aerobic respiration. The lactic acid needs to be oxidized to water and carbon dioxide.

Thus, the correct answer is option C i.e., cytoplasm.

Note: The cytoplasm serves as a barrier and protects the cellular organelles from damage caused by motions and collisions with other cells. In cytoplasm most of the metabolic reactions and enzymatic reactions occur.