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Cell Biology Chapter 3

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Questions and Answers

What is the primary role of the cell membrane in maintaining the internal environment of the cell?

It synthesizes proteins necessary for cell function.

It serves as a storage area for genetic material.

It regulates the passage of materials into and out of the cell. (correct)

It acts as a rigid structure to support the cell.

Which function of the cell membrane is crucial for maintaining homeostasis within the cell?

Providing structural support to the cell.

Isolating the cell from its surroundings.

Maintaining the ion concentration within the cytoplasm. (correct)

Facilitating energy production in the cell.

How does the cell membrane facilitate interaction with its environment?

By exclusively transporting nutrients into the cell.

By blocking all external signals.

By allowing specific recognition and regulatory functions. (correct)

Through the formation of rigid barriers.

In what way does the cell membrane contribute to cell communication?

Through structures that enable signal transduction. Signup and view all the answers

Which of the following is NOT a function of the cell membrane?

Providing energy for cellular processes. Signup and view all the answers

Which of the following organelles is classified as non-membranous?

Ribosomes Signup and view all the answers

What is the main characteristic of membranous organelles?

They are limited by a membrane. Signup and view all the answers

Which of the following is NOT a type of membranous organelle?

Cytoskeleton Signup and view all the answers

Which type of organelles includes microfilaments and microtubules?

Non-membranous organelles Signup and view all the answers

What function do lysosomes primarily serve in a cell?

Digestion of waste materials Signup and view all the answers