Question

Usually oxygen is necessary to life in the process of respiration but, for some organisms its presence adversely affect them. Comment with examples. ​

Answer 1

Answer:

There are two types of respiration which we classify on the basis of the presence or absence of oxygen:

Aerobic respiration

The respiration that takes place in the presence of oxygen is called aerobic respiration because it uses ‘air’ which contains oxygen. The aerobic respiration involves utilization of oxygen for the breakdown of chemical bonds in glucose to release energy in high amounts. It is the chief source of energy for plants and animals. Animals and plants that use oxygen for respiration are aerobes. Majority of animals have aerobic respiration.

C

6

H

12

O

6

+

6

O

2

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6

C

O

2

+

6

H

2

O

+

E

n

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r

g

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All the organisms that obtain energy by aerobic respiration cannot live without the oxygen. This is because if there is no oxygen, they cannot get energy from the food which they eat. Aerobic respiration produces more energy because a complete breakdown of glucose occurs during respiration by the use of oxygen.

Anaerobic Respiration

The respiration that takes place in the absence of oxygen is anaerobic respiration. In this process, incomplete oxidation of food material is being and produces carbon dioxide and alcohol. Beside this other organic matter like citric acid, oxalic acid, lactic acid, etc are also produced.

This process is also known as intramolecular Respiration. The anaerobic respiration takes place in organisms like yeast, some bacteria, and parasitic worms. The animals and plants that can survive and obtain energy even in the absence of oxygen are called Anaerobic.

Answer 2

Explanation:

Answer:

There are two types of respiration which we classify on the basis of the presence or absence of oxygen:

Aerobic respiration

The respiration that takes place in the presence of oxygen is called aerobic respiration because it uses ‘air’ which contains oxygen. The aerobic respiration involves utilization of oxygen for the breakdown of chemical bonds in glucose to release energy in high amounts. It is the chief source of energy for plants and animals. Animals and plants that use oxygen for respiration are aerobes. Majority of animals have aerobic respiration.

$C</p><p>6</p><p>H</p><p>12</p><p>O</p><p>6</p><p>+</p><p>6</p><p>O</p><p>2</p><p>⟶</p><p>6</p><p>C</p><p>O</p><p>2</p><p>+</p><p>6</p><p>H</p><p>2</p><p>O</p><p>+</p><p>E</p><p>n</p><p>e</p><p>r</p><p>g</p><p>y$

All the organisms that obtain energy by aerobic respiration cannot live without the oxygen. This is because if there is no oxygen, they cannot get energy from the food which they eat. Aerobic respiration produces more energy because a complete breakdown of glucose occurs during respiration by the use of oxygen.

Anaerobic Respiration

The respiration that takes place in the absence of oxygen is anaerobic respiration. In this process, incomplete oxidation of food material is being and produces carbon dioxide and alcohol. Beside this other organic matter like citric acid, oxalic acid, lactic acid, etc are also produced.

This process is also known as intramolecular Respiration. The anaerobic respiration takes place in organisms like yeast, some bacteria, and parasitic worms. The animals and plants that can survive and obtain energy even in the absence of oxygen are called Anaerobic.