In Electron Transport, the Three Protein Complexes (I, III, and IV)

question 17

Multiple Choice

In electron transport, the three protein complexes (I, III, and IV)

• A) act as proton pumps, which generate a proton gradient.
• B) transfer electrons from NAD+ to O₂.
• C) transfer electrons from FAD to O₂.
• D) act as electron pumps, which generate an electron gradient.
• E) act as Ca²⁺ pumps, which generate a Ca²⁺ gradient.

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Definitions:

Artificial Opening

A surgically created opening in the body for the discharge of bodily wastes or other purposes.

Small Incision

A minimal cut or surgical opening in the skin or body tissue, often used in less invasive procedures to reduce healing time and risk of infection.

Internal Ulcer

A sore or lesion forming on the interior lining of an organ, often in the stomach or intestines, causing pain and discomfort.

Gastric Ulcer

A sore or lesion that develops on the lining of the stomach, caused by various factors, including infection with Helicobacter pylori.