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WorksheetsAP Bio Cell Communication
Total questions: 18
Worksheet time: 16mins
Name
Class
Date
1.
The termination of cell signaling requires which of the following?
a)
removal of the ligand
b)
removal of the receptor
c)
apoptosis
d)
converting of GDP to GTP
2.
Each of the following numbered processes are involved in signal transduction pathways:
I. Response
II. Amplification
III. Reception
IV. Transduction
Which of the following represents the sequence of events in a typical signal transduction pathway?
I. Response
II. Amplification
III. Reception
IV. Transduction
Which of the following represents the sequence of events in a typical signal transduction pathway?
a)
I, II, III, IV
b)
III, I, IV, II
c)
II, IV, I, III
d)
III, IV, II, I
3.
Epinephrine (also known as adrenaline or adrenalin) is a hormone and a neurotransmitter. The model for the action of Epinephrine is shown below.
Which of the following would likely not be observed in a person injected with epinephrine?
Which of the following would likely not be observed in a person injected with epinephrine?
a)
Decreased production of cAMP in liver cells
b)
activation of phosphorylase
c)
Increased glucose mobilization
d)
Activation of G proteins
4.
Epinephrine (also known as adrenaline or adrenalin) is a hormone and a neurotransmitter. The model for the action of Epinephrine is shown below.
Which of the following best describes a benefit of the many steps involved in a protein kinase cascade?
Which of the following best describes a benefit of the many steps involved in a protein kinase cascade?
a)
It allows for the activation or inhibition of many enzymes.
b)
It allows for the amplification of the signal.
c)
It allows for the distribution of the signal throughout the inside of the cell.
d)
All of the above.
5.
Epinephrine (also known as adrenaline or adrenalin) is a hormone and a neurotransmitter. The model for the action of Epinephrine is shown below.
All of the following are enzymes involved in the signal transduction pathway shown EXCEPT
All of the following are enzymes involved in the signal transduction pathway shown EXCEPT
a)
adenyl cyclase
b)
protein kinase A
c)
phosphorylase kinase
d)
epinephrine
6.
Cell signaling involves converting extracellular signals to specific responses inside the target cell. Which of the following best describes how a cell initially responds to a signal?
a)
The cell experiences a change in receptor conformation
b)
The cell experiences an influx of ions
c)
The cell experiences an increase in protein kinase activity
d)
The cell experiences G protein activation
7.
Which of the major receptors reacts by forming dimers?
a)
G protein coupled receptors
b)
ligand-gated ion channels
c)
steroid receptors
d)
receptor tyrosine kinase
8.
When epinephrine binds to cardiac (heart) muscle cells, it speeds their contraction. When it binds to muscle cells of the small intestine, it inhibits their contraction. Which of the following best accounts for the fact that the same hormone can have different effects on muscle cells?
a)
Cardiac cells have more receptors for epinephrine than do intestinal cells
b)
Epinephrine circulates to the heart first and thus is in higher concentration around cardiac cells
c)
The two types of muscle cells have different signal transduction pathways for epinephrine and thus have different cellular responses
d)
Cardiac muscle is stronger than intestinal muscle and thus has a stronger response to epinephrine
9.
What is a G protein?
a)
specific type of membrane-receptor protein
b)
protein on the cytoplasmic side of a membrane
c)
membrane-bound enzyme
d)
relay protein
10.
Which of the following can activate a protein by transferring a phosphate group to it?
a)
cAMP
b)
G Protein
c)
protein kinase
d)
protein phosphatase
11.
What do second messengers do?
a)
transport a signal through the lipid bilayer
b)
relay a signal from the outside to the inside of the cell
c)
relay message from the inside of the mebrane throughout the cytoplasm
d)
dampen the message
12.
Which of the following is involved in many human medicines for disease?
a)
cAMP
b)
Calcium concentration
c)
G-protein pathways
d)
receptor tyrosine kinases
13.
Signal amplification is most often achieved by
a)
an enzyme cascade
b)
binding of multiple signals
c)
branching pathways
d)
action of adenylyl cyclase
14.
What does a protein phosphatase do?
a)
removes phosphates
b)
transfers phosphates from ATP to proteins
c)
activates an enzyme with a signal molecule
d)
transfers phosphates from GTP to proteins
15.
What is a phosphorylation cascade?
a)
traveling of hormones through the air
b)
traveling of hormones through the blood
c)
the removal of a phosphate
d)
a series of molecules that get phosphorylated
16.
Which of the following is an example of a second messenger?
a)
cAMP
b)
GTP
c)
insulin
d)
epinephrine
17.
Why are steroid hormones able to pass through the cell membrane?
a)
Steroid hormones diffuse through ion channels
b)
steroid hormones are hydrophobic
c)
steroid hormones are hydrophilic
d)
steroid hormones bind to G protein coupled receptors
18.
A signaling molecule that binds to a larger molecule is called a
a)
ligand
b)
G protein
c)
transducer
d)
tyrosine kinase
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