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12 Questions

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Cell Membrane Structure and Functions

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Questions and Answers

What is the classification of membrane proteins?

Integral and peripheral proteins (correct)

Channel and carrier proteins

Glycoproteins and glycolipids

Receptor and transporter proteins

What is the primary function of endocytosis?

To transport small molecules across the membrane

To synthesize proteins in the cell

To uptake large particles or fluid from the extracellular medium (correct)

To release macromolecules to the exterior

What is the term for the ingestion of large particles such as viruses, bacteria, cells, or debris?

Phagocytosis (correct)

Exocytosis

Pinocytosis

Receptor-mediated endocytosis

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 receptor-mediated endocytosis?

Uptake of LDL molecule and its receptor Signup and view all the answers

What are the two types of membrane carbohydrates?

glycoproteins and glycolipids Signup and view all the answers

What is the primary function of the cell membrane?

Separating the cytoplasm from its extracellular environment Signup and view all the answers

Which of the following lipid components is prominent in myelin sheaths?

Sphingomyelin Signup and view all the answers

What is the function of the hydroxyl group of cholesterol in the cell membrane?

It faces the aqueous interface and restricts the movement of the phospholipid fatty acids Signup and view all the answers

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

Amphipathic Signup and view all the answers

What is the function of the carbohydrate component of the cell membrane?

It is involved in cell signaling and recognition Signup and view all the answers

What is the primary component of the cell membrane that contributes to its selective permeability?

Channels and pumps Signup and view all the answers