Nitrogen-Fixing Bacteria in the Roots of Soybeans Help Provide a Source

question 67

Multiple Choice

Nitrogen-fixing bacteria in the roots of soybeans help provide a source of nitrogen to the plants and,in exchange obtain food from the plants.Which reaction can these bacteria catalyze?

• A) nitrogen gas (N₂) to nitrate (NO₃)
• B) nitrogen gas (N₂) to ammonium (NH₄)
• C) nitrate (NO₃) to nitrogen gas (N₂)
• D) nitrate (NO₃) to ammonium (NH₄)
• E) ammonium (NH₄) to nitrate (NO₃)

---

Definitions:

Depolarization

A reduction in the difference in electrical charge across a cell's plasma membrane, typically leading to nerve impulse transmission or muscle contraction.

Electrocardiogram

A diagnostic tool that measures and records the electrical activity of the heart to detect abnormalities.

P Wave

The first wave in an ECG, representing the depolarization of the atria before the heart beats.

QRS Complex

Principal deflection in the electrocardiogram, representing ventricular depolarization.