During the End Reaction of the Electron Transport Chain, Molecular

question 9

Multiple Choice

During the end reaction of the electron transport chain, molecular oxygen becomes _____.

• A) oxidized to carbon dioxide
• B) reduced to water
• C) NADH + H⁺
• D) FADH₂

---

Definitions:

Bulbospongiosus

A muscle of the perineum that plays a role in sexual function and urination.

Ischiocavernosus

A muscle that helps stiffen the penis or clitoris during sexual arousal by compressing the base of the erectile tissues.

Semispinalis Thoracis

A muscle in the back that extends from the thoracic vertebrae to the base of the skull, helping in the extension and rotation of the spine.

Multifidus

A muscle located in the spine that stabilizes the vertebrae and assists with spinal movements.