Home
Class 11
BIOLOGY
Assertion : Nitogen - fixing bacteria in...

Assertion : Nitogen - fixing bacteria in legume root nodules survive in oxygen - depleted cells of nodules.
Reason : Leghaemoglobin completely removes oxygen from the nodule cells.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

B

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
C
The atmospheric nitrogen to ammonia by the nitrogenase enzyme complex found in nitrogen-fixing bacteria. The enzyme nitrogenase is highly sensitive to molecular oxygen as it functions under anaerobic condition. Thus the root nodules have adapted themselves that ensure that the enzyme is protected from oxygen.
Promotional Banner

Similar Questions

Explore conceptually related problems

In root nodules of legumes , leghaemoglobin

Assertion : The nitrogen-fixing bacteria in leguminous plant nodules live as symbionts. Reason : Leg-haemoglobin synthesized by leguminous plants protect bacteria

Assertion : Nitrogen fixing enzyme in legume root nodules function at low oxygen concentration. Reason : Low oxygen concentration is provided by leghaemoglobin.

Bacteria found in root nodules of legumes are

What is the name of nitrogen fixing bacterium found in the root nodules of legumes ?

The symbiotic nitrogen fixing bacteria present in root nodules of legumes belong to genus

Releation between bacteria and legume having nodulated roots is that of

Assertion : Nitrogenase enzyme gets inactivated in presence of oxygen yet N_(2) fixation occurs in aerobic cells of legume nodules. Reason : Laghaemoglobin allows presence of oxygen just sufficient for cellular respiration only.

The N_(2) -fixing bacterium associated with root nodules of legumes is known as