Summer Comprehensive Exam

What is the primary function of the cell membrane?

• To protect the cell’s genetic material

• To regulate what enters and leaves the cell

• To provide energy for the cell

• To produce proteins

Tags

NGSS.MS-LS1-2

Cholesterol in the cell membrane functions to:

• Increase membrane fluidity

• Decrease membrane fluidity

• Act as a channel for transport

• Bind to hormones

The sodium-potassium pump is an example of:

• Passive transport

• Facilitated diffusion

• Active transport

• Osmosis

Which of the following is a component of the cell membrane?

• DNA

• RNA

• Phospholipids

• Glucose

Which process requires energy input to move substances across a cell membrane?

• Diffusion

• Osmosis

• Active transport

• Facilitated diffusion

The fluid mosaic model describes the structure of the cell membrane as:

• A rigid, static structure

• A flexible layer made of lipid molecules interspersed with proteins

• A single layer of protein molecules

• A double layer of carbohydrate molecules

Osmosis specifically refers to the movement of:

• Solutes from high to low concentration

• Solvents from high to low concentration

• Solvents from low to high concentration

• Water across a semipermeable membrane

What is the main difference between diffusion and facilitated diffusion?

• Diffusion requires energy, facilitated diffusion does not

• Facilitated diffusion requires a transport protein

• Diffusion moves molecules from low to high concentration

• Facilitated diffusion occurs only in plants

In an isotonic solution, a cell will:

• Swell and burst

• Shrink and shrivel

• Remain the same size

• Take in solutes

Tags

NGSS.HS-LS1-3

Which of the following molecules can freely pass through the cell membrane without assistance?

• Water

• Glucose

• Sodium ions

• Oxygen