One Purpose of the Electron Transport Chain Is to

question 106

Multiple Choice

One purpose of the electron transport chain is to

• A) cycle NADH + H⁺ back to NAD⁺.
• B) use the intermediates from the citric acid cycle.
• C) break down pyruvate.
• D) increase the number of protons in the mitochondrial matrix.
• E) consume excess ATP.

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Definitions:

Maintained Contact

A switch mechanism that keeps or maintains its position (either on or off) until manually changed or actuated.

Momentary Contact

Momentary contact refers to an electrical switch or relay contact that only completes the circuit while being physically engaged or pressed.

Three-Wire

A wiring configuration typically used in electrical circuits, incorporating a live wire, a neutral wire, and a ground wire for safety.

Normally-Open

A contact configuration in switches or relays that is open (non-conducting) when at rest, closing only when activated.