Membrane Proteins and Their Functions Quiz

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What is the primary function of membrane proteins?

Cell-cell adhesion and cell-matrix adhesion

Intercellular signaling and formation of transmembrane channels

Transport of materials into and out of the cell

All of the above (correct)

Which of the following statements about peripheral membrane proteins is true?

They are attached to the membrane by covalent bonds

They are permanently embedded in the membrane bilayer

They are held in place by strong ionic bonds

They are attached to the membrane by weak noncovalent bonds (correct)

What is the function of aquaporins?

To transport lipids across the cell membrane

To transport ions across the cell membrane

To transport water molecules across the cell membrane (correct)

To transport proteins across the cell membrane

What is the glycocalyx?

A coating of glycoproteins and glycolipids on the outer surface of the plasma membrane Signup and view all the answers

What is the primary function of the glycocalyx?

All of the above Signup and view all the answers

What does the electron microscopy image show?

The plasma membrane of a microvilli from a lining cell of the small intestine Signup and view all the answers

Which of the following statements about cell membranes is correct?

Cell membranes are composed of approximately equal amounts of lipids and proteins. Signup and view all the answers

What is the primary function of the lipid bilayer in cell membranes?

To separate the interior of the cell from the external environment and internal compartments. Signup and view all the answers

Which of the following is a property of phospholipid molecules in cell membranes?

They are amphiphilic, with a polar head and a non-polar tail. Signup and view all the answers

What is the primary function of proteins embedded within the lipid bilayer of cell membranes?

To facilitate the passage of specific ions and molecules. Signup and view all the answers

Which of the following statements about the chemical reactions in cells is correct?

Most chemical reactions in cells take place in aqueous polarized solutions. Signup and view all the answers

What is the primary role of membrane proteins in cell signaling?

They mediate cell signaling processes. Signup and view all the answers

Which of the following is NOT a component of the plasma membrane?

Ribosomes Signup and view all the answers

What is the primary function of the nucleus?

To contain the cell's genetic material Signup and view all the answers

Membrane Proteins and Their Functions Quiz

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Questions and Answers

What is the primary function of membrane proteins?

Which of the following statements about peripheral membrane proteins is true?

What is the function of aquaporins?

What is the glycocalyx?

What is the primary function of the glycocalyx?

What does the electron microscopy image show?

Which of the following statements about cell membranes is correct?

What is the primary function of the lipid bilayer in cell membranes?

Which of the following is a property of phospholipid molecules in cell membranes?

What is the primary function of proteins embedded within the lipid bilayer of cell membranes?

Which of the following statements about the chemical reactions in cells is correct?

What is the primary role of membrane proteins in cell signaling?

Which of the following is NOT a component of the plasma membrane?

What is the primary function of the nucleus?

Which organelle is responsible for producing energy in metabolically active cells?

Which of the following is a characteristic of prokaryotic cells?

Which organelle is responsible for protein synthesis in eukaryotic cells?

What is the process by which cells become specialized for specific functions?

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