Molecular Oxygen (O₂), Which Is Required for the Production of ATP

question 57

Multiple Choice

Molecular oxygen (O₂) , which is required for the production of ATP by mitochondria, must pass through at least three membranes to get to the enzymes where it is used. O₂ is also produced in chloroplasts and must pass through at least four membranes to be released from the plant. How does O₂ move across biological membranes?

• A)There are numerous protein transporters that allow O₂ to travel across membranes.
• B)O₂ is nonpolar and very small, so it can move by simple diffusion across the membrane.
• C)O₂ undergoes a chemical reaction that binds it to other substances that are transported across the membranes.
• D)O₂ is hydrophilic and travels with water across the membranes.

---

Definitions:

Format Text

Refers to the process of adjusting the presentation of written content, including font size, color, and style in a document or application.

PDF

Portable Document Format, a file format developed by Adobe Systems for representing documents in a manner independent of application software, hardware, and operating systems.

XPS

A file format developed by Microsoft that preserves document formatting, intended for sharing, printing, and archiving documents.

Document Format

Refers to the structure and organization of a document, including its layout, fonts, and styling.