The Cell Membrane

Which term or phase best describes the cell membrane?

• impermeable

• semi-permeable

• completely permeable

• solid

Tags

NGSS.MS-LS1-2

Which best describes the function of the cell membrane?

• protects and supports the cell and also controls everything that enters and leaves the cell

• provides structural support for cells to keep them from shrinking and expanding too much

• is the control center of the cell

• is the site of protein synthesis in cells

Tags

NGSS.MS-LS1-2

True/False: The cell membrane allows only certain substances to enter or cell a cell.

• True

• False

Tags

NGSS.MS-LS1-2

The foundation of the cell membrane is made of primarily which molecule?

• phospholipid

• cellulose

• cholesterol

• protein

• water

What is the function of proteins embedded in the cell membrane? Select all that apply.

• to act as receptors, helping to identify the cell

• to help to transport material into and out of the cell

• t0 provide the foundation of the cell membrane

• to produce sugars needed for cellular respiration

Because the molecules of the cell membrane are in constant motion and because of the different molecules that make up the membrane, it is frequently described as a...

• fluid mosaic

• semi-permeable barrier

• a transparent entity

• a drop of oil

True/False: Cell membranes and the membranes that bound organelles (known as plasma membranes) are structurally very different.

• True

• False

A hydrophobic substance...

• is attracted to water

• repels from water

• will mix easily with water

• can dissolve in water

A hydrophilic substance...

• is attracted to water

• is repelled by water

• will not dissolve in water

• hates water

The phospholipids that make up plasma membranes are arranged in a ____________ structure.

• bi-layer

• cubic

• single-layer

• triple-layer