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Plasma Membrane Structure & Function Quiz

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Plasma Membrane Structure & Function Quiz

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Questions and Answers

What is the primary function of the plasma membrane in a cell?

To store genetic information

To provide mechanical support to the cell

To synthesize proteins and lipids

To separate the internal cytoplasm from the external environment (correct)

What is the arrangement of the phospholipid bilayer in the plasma membrane?

Nonpolar tails on the inner surface and hydrophilic polar heads on the outer surface

Hydrophilic polar heads on the inner surface and nonpolar tails on the outer surface

Nonpolar tails on the outer surface and hydrophilic polar heads on the inner surface

Hydrophilic polar heads on the outer surface and nonpolar tails on the inner surface (correct)

What is the role of cholesterol in the plasma membrane?

To synthesise proteins

To increase the fluidity of the membrane (correct)

To provide mechanical support to the membrane

To reduce the fluidity of the membrane

What is the function of glycoproteins and glycolipids in the plasma membrane?

To contribute to the cell’s ‘fingerprint’ for cellular identification Signup and view all the answers

What is the role of channel proteins in the plasma membrane?

To allow the passage of molecules through the membrane via a channel Signup and view all the answers

What type of proteins are found on the inner surface of the plasma membrane?

Peripheral proteins Signup and view all the answers

What is the primary function of carrier proteins in the plasma membrane?

To assist in the passage of molecules through the membrane Signup and view all the answers

Why are organ transplants often difficult?

Because the donor's MHC glycoproteins are not compatible with the recipient's Signup and view all the answers

What is the role of adenylate cyclase in the body?

To catalyze a specific reaction involved in ATP metabolism Signup and view all the answers

What is the result of faulty plasma membrane growth hormone receptors?

Some forms of dwarfism Signup and view all the answers

What is the purpose of tight junctions between cells?

To join cells together to form a functional tissue Signup and view all the answers

What is the result of the failure of the liver to store glucose as glycogen?

Diabetes Signup and view all the answers