Cell Membrane Structure and Function Quiz

What is the primary function of integral proteins in the cell membrane?

• To provide structural support to the cell

• To facilitate the transport of molecules across the membrane

• To store energy for the cell

• To synthesize proteins

Which part of a phospholipid is polar?

• The fatty acid tails

• The phosphate head

• The entire molecule

• The glycerol backbone

What role does cholesterol play in the cell membrane?

• It acts as a channel for ions

• It provides energy for active transport

• It maintains membrane fluidity

• It synthesizes proteins

What would happen if the membranes of two cells were combined?

• The cells would become more rigid

• The cells would lose their ability to transport molecules

• The membranes would mix, demonstrating the fluid mosaic model

• The cells would immediately die

Which molecules can pass through the cell membrane by simple diffusion?

• Large proteins

• Ions

• Small nonpolar molecules

• Glucose

Tags

NGSS.HS-LS2-3

What is the main difference between active transport and passive transport?

• Active transport requires energy, while passive transport does not.

• Passive transport requires energy, while active transport does not.

• Both require energy.

• Neither requires energy.

What is the function of glycoproteins in the cell membrane?

• To transport water across the membrane

• To act as receptors for signaling molecules

• To provide structural support

• To synthesize lipids

How do saturated and unsaturated fatty acid tails affect membrane fluidity?

• Saturated tails increase fluidity, unsaturated tails decrease it

• Unsaturated tails increase fluidity, saturated tails decrease it

• Both increase fluidity

• Both decrease fluidity

Which of the following is an example of facilitated diffusion?

• Oxygen entering a cell

• Glucose entering a cell through a transporter protein

• Sodium ions being pumped out of a cell

• Water moving through aquaporins

What is the role of peripheral proteins in the cell membrane?

• To transport molecules across the membrane

• To provide structural support and cell signaling

• To synthesize lipids

• To store genetic information