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Cell Membrane Structure and Function

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Questions and Answers

What is the primary function of the cell membrane in a multicellular organism?

To store genetic information
To synthesize proteins
To separate the inner contents of a cell from its exterior environment (correct)
To regulate cell division

What is the arrangement of phospholipids in the cell membrane?

Head to head, tail to tail
Tail to head, head to tail
Head to tail, tail to head
Tail to tail, head to head (correct)

What is the property of the phosphate groups in phospholipids?

Hydrophobic and polar
Hydrophobic and non-polar
Hydrophilic and polar (correct)
Hydrophilic and non-polar

What is the name of the fluid inside the cell?

Intracellular fluid (C) Signup and view all the answers

What is the purpose of the hydrophobic tails in the phospholipid bilayer?

To associate with one another, forming the interior of the membrane (A) Signup and view all the answers

What is the function of the polar heads in the phospholipid bilayer?

To contact the fluid inside and outside of the cell (D) Signup and view all the answers

What is the main reason why the phosphate groups are attracted to the extracellular fluid?

Because the phosphate groups are negatively charged (C) Signup and view all the answers

What is the function of peripheral proteins on the surface of intestinal cells?

To act as digestive enzymes (C) Signup and view all the answers

What type of molecules are soap and phospholipids?

Amphipathic molecules (B) Signup and view all the answers

Why do the lipid tails meet in the inner region of the membrane?

Because they are hydrophobic (C) Signup and view all the answers

What is the term given to extracellular fluid not contained within blood vessels?

Interstitial fluid (B) Signup and view all the answers

What is the main component of the cell membrane?

Phospholipid bilayer (B) Signup and view all the answers