Question

5. Write two illustrations where life supporting oxygen is harm full for some life forms.

Answer 1

Oxygen is harmful for anaerobic bacteria such as nitrogen fixing bacteria.
In the presence of oxygen some enzymes will not function properly ex : nitrogenous reductase enzyme

Answer 2

There are certain example where life supporting oxygen is harm full for some life forms.

Explanation:

• Oxygen may be a cause for the decrease in the functioning of the nitrogenase reductase enzyme. This is because it is a partial antagonist of the enzyme and it decreases nitrogen fixation.

• After ischaemia in any organ if there is a sudden increase in the oxygen supply it may result in the formation of reactive oxygen species. This results in the death of tissue and is responsible for tissue necrosis.

To know more about reactive oxygen species,

What is reactive oxygen species?

What is reactive oxygen species(ROS)? - Brainly.in