Question

describe an experiment to show that the anaerobic respiration takes place in the absence of Oxygen and aerobic respiration takes place in the presence of oxygen​

Answer 1

Answer:

In the cell, the food (glucose) is broken

down into carbon dioxide and water using

oxygen. When breakdown of glucose

occurs with the use of oxygen it is called

aerobic respiration. Food can also be

broken down, without using oxygen. This

is called anaerobic respiration.

Breakdown of food releases energy.

in the presence of oxygen Glucose →

carbon dioxide + water + energy

You should know that there are some

organisms such as yeast that can survive

in the absence of air. They are called

anaerobes. They get energy through

anaerobic respiration. In the absence of

oxygen, glucose breaks down into alcohol

and carbon dioxide, as given below:

in the absence of oxygen Glucose →

alcohol + carbon dioxide + energy

2021–22

RESPIRATION IN ORGANISMS 109

Our muscle cells can also respire

anaerobically, but only for a short time,

when there is a temporary deficiency of

oxygen. During heavy exercise, fast

running (Fig. 10.1), cycling, walking for

many hours or heavy weight lifting, the

demand for energy is high. But the

supply of oxygen to produce the energy

is limited. Then anaerobic respiration

takes places in the muscle cells to fulfil

the demand of energy:

→

(in muscle)

in the absence of oxygen Glucose

lactic acid + energy