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12 Questions

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Cell Membrane Structure and Function

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Questions and Answers

Which of the following is NOT a component of cell membrane structure?

Lipids

Nucleic acids (correct)

Carbohydrates

Proteins

What is the primary function of the cell membrane?

To provide structural support to the cell

To separate the cytoplasm from its extracellular environment (correct)

To regulate cell growth

To facilitate cellular movement

What is the primary function of cholesterol in cell membranes?

To increase the fluidity of membrane components

To facilitate the transport of materials across the membrane

To restrict the movement of phospholipid fatty acids, modulating membrane fluidity (correct)

To provide energy to the cell

What is the term used to describe membrane lipids that contain both hydrophobic and hydrophilic regions?

Amphipathic Signup and view all the answers

Which of the following lipids is prominent in myelin sheaths?

Sphingomyelin Signup and view all the answers

What is the process by which the cell membrane exchanges material with the extracellular fluids?

Endocytosis and exocytosis Signup and view all the answers

What is the main classification of membrane proteins?

Peripheral and integral proteins Signup and view all the answers

What is the process by which the cell uptakes large particles or fluid from the extracellular medium to the inside the cell?

Endocytosis Signup and view all the answers

Which type of endocytosis involves the ingestion of large particles such as viruses, bacteria, cells, or debris?

Phagocytosis Signup and view all the answers

What is the term for the release of macromolecules to the exterior of the cell?

Exocytosis Signup and view all the answers

What is an example of a molecule that is internalized by coated pits containing its specific receptor?

Low-density lipoprotein (LDL) Signup and view all the answers

What is the transport of small molecules across the membrane classified into?

Passive and active transport Signup and view all the answers