Free Printable Cell Communication

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Cell Communication

Total questions: 20

Worksheet time: 20mins

Name

Class

Date

Which of the following would be an example of paracrine signaling in animals?

neurotransmitter acetylcholine

hormone epinephrine

neurotransmitter norepinephrine

growth factor

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

ligand

second messenger

protein kinase

receptor protein

What is a G protein?

specific type of membrane-receptor protein

protein on the cytoplasmic side of a membrane

membrane-bound enzyme

relay protein

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

cAMP

G Protein

protein kinase

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

relay message from the inside of the mebrane throughout the cytoplasm

dampen the message

What is a function of the second messenger IP3?

bind to and activate protein kinase A

activate transcription factors

convert ATP to cAMP

bind to and open ligand-gated channels

Signal amplification is most often achieved by

an enzyme cascade

binding of multiple signals

branching pathways

action of adenylyl cyclase

What does a protein kinase do?

removes phosphates

transfers phosphates from ATP to proteins

activates an enzyme

What does a protein phosphatase do?

removes phosphates

transfers phosphates from ATP to proteins

activates an enzyme with a signal molecule

10.

What is a phosphorylation cascade?

travelling of hormones through the air

travelling of hormones through the blood

the removal of a phosphate

a series of molecules that get phosphorylated

11.

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

phosphorylation cascade

cAMP

signal receptors

phosphatase

12.

Do plant cells communicate using hormones?

yes

13.

Which of the following converts cAMP to AMP?

phosphodiesterase

protein phosphatase

GTPase

14.

Which of the following is a chemical message that usually travels through the bloodstream to target cells?

hormone

local regulator

endocrine cell

15.

In cell signaling, how is the flow of specific ions

regulated?

Opening and closing of ligand-gated channels

Transduction

Cytoskeleton rearrangement

Endocytosis

16.

Many signal transduction pathways use second messengers to:

transport a signal through the lipid bilayer portion of the plasma membrane.

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

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

amplify the message by phosphorylating proteins.

17.

In cell signaling, how is the flow of specific ions

regulated?

Opening and closing of ligand-gated channels

Transduction

Cytoskeleton rearrangement

Endocytosis

18.

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

cAMP

G proteins

phosphodiesterase

protein kinase

19.

What could happen to the target cells in an animal that lack receptors for local regulators?

They could compensate by receiving nutrients via an α factor.

They could develop normally in response to neurotransmitters instead.

They could divide but never reach full size.

They would not be able to multiply in response to growth factors from nearby cells.

20.

The 3 steps of signal transduction in order are

reception, transduction, response

response, transduction, reception

reception, response, transduction

transduction, reception, response

100 %

Cell Communication

Total questions: 20

Worksheet time: 20mins

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