Question

How do legumes reduce oxygen levels in nodules in order for nitrogen-fixation to occur? [Select all that apply.] modify the bacterial nitrogenase enzyme using allosteric regulation produce leghemoglobin molecules to sequester oxygen line outer cells of nodules with lignin form symbiotic associations with obligately anaerobic bacteria cover nodules with polysaccharide sheath

Answer 1

Answer

Option A- Incorrect

Reason - It is responsible for the reduction of Nitrogen.

Option B - Correct

Reason - Leghemoglobin is an oxygen carrier hemo protein which helps to reduce the oxygen level.

Option C -Incorrect

Reason - Lignin is a supporting tissue.

Option D.-Incorrect

Reason- Symbiotic association with rhizobium bacteria is mainly for nitrogen fixation.

Option E -Incorrect

Reason - Polysaccharide sheath helps in interactions of cells with environment.