Cell Communication

A signal molecule that binds to a plasma-membrane protein is a

• ligand

• protein kinase

• second messenger

• receptor protein

What type of transport is this?

• Endocytosis

• Exocytosis

• Diffusion

• Osmosis

Which letter represents the cell membrane?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-2

Which letter represents the signal molecule coming from outside of the cell?

• A

• B

• C

• D

What is a G protein?

• protein on the cytoplasm membrane

• membrane bound enzyme

• specific type of membrane receptor protein

• a relay protein

Which of the following can activate a protein by transferring a phosphate group to it?

• cAMP

• protein kinase

• G protein

• protein phosphatase

What do second messengers do?

• transport a signal through the lipid bilayer

• relay a signal from the outside to the inside of the cell

• slow down the message

• relay message from the inside of the membrane throughout the cytoplasm

What determines whether a cell is a target cell for a particular signal molecule?

• phosphorylation cascade

• signal receptor proteins

• cAMP

• protein kinase

Signal amplification is most often achieved by

• branching pathways

• binding of multiple signals

• an enzyme cascade

• second messengers

What determines whether a signal molecule can enter through the cell membrane?

• size

• polarity

• charge

• all the above