4.1 Cell membrane Structure

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

• contains different types of proteins

• contains the cells DNA

• composed of phospholipid bilayer

• allows molecules to move into/out of the cell.

Which are the primary molecules that make up the plasma membrane?

• proteins

• carbohydrates

• phospholipids

• nucleic acids

What is the function of the proteins embedded in the plasma membrane?

• they selectively allow things into and out of the cell

• they give the cell a positive charge

• they store energy for the cell to use later

Which of the following give the plasma membrane its structure?

• protein channels

• phospholipids

• carbohydrate chains

How are channel proteins and carrier proteins similar?

• they connect the cell membrane to the nucleus

• they allow molecules into and out of the cell

• the stop the flow of molecules into and out of the cell

Allowing waste to exit the cell and regulating the movement of water into and out of the cell are both function of which organelle?

• nucleus

• plasma membrane

• lysosome

Tags

NGSS.MS-LS1-2

Which component of this membrane contains a hydrophobic tail and hydrophilic head?

• protein

• cholesterol

• phospholipid

• nucleic acid

Why is the plasma membrane called "selectively" permeable?

• it allows all things into/out of the cell

• it doesn't allow anything to go into or out of the cell

• it chooses what can go into or out of the cell

This type of protein is fully on one side or the other of the cell membrane

• transmembrane

• integral

• peripheral

Because the hydrophobic tails line the inside and the hydrophilic heads line the outside the plasma membrane is referred to as a lipid....

• phospholayer

• bilateral layers

• bilayer