The Plasma Membrane of a Cell and the Membrane Boundaries

question 52

Multiple Choice

The plasma membrane of a cell and the membrane boundaries of organelles,such as mitochondria and chloroplasts,serve similar functions.What is one of the main functions of the membranes of both cells and organelles?

• A) They keep reactants near each other to speed biological reactions.
• B) They allow external chemicals to diffuse freely into and out of the cell.
• C) They encourage cellular respiration at the membrane boundaries.
• D) They keep water out of the cell and organelle interiors.

---

Definitions:

Webpage

An individual document or single entity on the World Wide Web, which can be accessed through a web browser by entering a specific URL.

Placeholder Text

Typically used in design and publishing, it is dummy text inserted into a document or visual layout to help indicate where actual text will later be placed.

Template

A pre-designed framework or layout that can be used as a starting point to create new documents or projects, ensuring consistency and saving time.

PDF File

A file format developed by Adobe Systems used for creating, viewing, and distributing documents that preserve the original layout.