Which Is Not Essential to the Process of Biological Nitrogen

question 23

Multiple Choice

Which is not essential to the process of biological nitrogen fixation in soybean (legume) nodules?

• A) N₂ gas
• B) O₂ gas
• C) A strong reducing agent
• D) A great deal of energy
• E) The enzyme nitrogenase

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Definitions:

δ-hydroxyvaleric Acid

An organic compound that is structurally a hydroxylated form of valeric (pentanoic) acid, where the hydroxyl group is on the δ-carbon.

Compound

A substance made up of two or more different elements chemically bonded together.

Hydrogen-bonded Dimers

Pairs of molecules that are connected by hydrogen bonds, often observed in carboxylic acids and alcohols.

Molecular Weights

The sum of the atomic weights of all atoms in a molecule, representing the mass of a molecule relative to the unified atomic mass unit.