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Unit 4 Cell Communication & Cell Cycle (AP Bio)

Total questions: 35

Worksheet time: 20mins

Name
Class
Date
1.
A signal molecule that binds to a plasma-membrane protein is a
a)
ligand
b)
second messenger
c)
protein kinase
d)
receptor protein
2.
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
3.
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
4.
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
5.
Signal amplification is most often achieved by
a)
an enzyme cascade
b)
binding of multiple signals
c)
branching pathways
d)
action of adenylyl cyclase
6.
What does a protein kinase do?
a)
removes phosphates
b)
transfers phosphates from ATP to proteins
c)
activates an enzyme
7.
What does a protein phosphatase do?
a)
removes phosphates
b)
transfers phosphates from ATP to proteins
c)
activates an enzyme with a signal molecule
8.
What determines whether a cell is a target cell for a particular signal molecule?
a)
phosphorylation cascade
b)
cAMP
c)
signal receptors
d)
phosphatase
9.
What determines whether a signal molecule binds on the surface or enters the cell?
a)
size
b)
polarity
c)
ability to cross the membrane
d)
all of these are correct
10.
Which of the following is a chemical message that usually travels through the bloodstream to target cells?
a)
hormone
b)
local regulator
c)
endocrine cell
11.

Cells can communicate with one another via:

a)

chemical messengers

b)

hormones

c)

gap junctions

d)

all of these

12.

Does DNA replicate before or after cell replication?

a)

before the cell divides

b)

after the cell divides

13.

G1 is associated with what event?

a)

doubling of cell content

b)

DNA replication

c)

The beginning of mitosis

d)

breakdown of the nuclear membrane

14.
Structure (b) is a ____.
a)
chromosome
b)
chromatid
c)
centromere
15.
Which of the following shows the correct sequence of the cell cycle?
a)
Mitosis-> G1->S->G2->cytokinesis
b)
S->G1-> G2-> mitosis-> cytokinesis
c)
cytokinesis->mitosis->G1->S->G2
d)
 G1->S->G2->mitosis->cytokinesis
16.

According to the feedback loop, what does high blood sugar promote?

a)

Insulin Release

b)

Glucagon Release

c)

Insulin Uptake

d)

Glycogen Uptake

17.
When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.
a)
Positive Feedback Response
b)
Negative Feedback Loop 
18.
As you get dehydrated, your blood becomes thicker and harder to pump. Your kidneys will respond by stopping urine production, sending the water from urine into your bloodstream to thin your blood back to normal level.
a)
Positive Feedback Response
b)
Negative Feedback Loop 
19.
sequence
a)
C,D, B, A, F, E
b)
D,A,F,C,E,B
c)
B,E,C,F,A,D
d)
C,B,D,A E,F
20.
DNA is replicated during ______ of the cell cycle.
a)
G1
b)
S
c)
G2
d)
G0
21.
Why do cells go through cell division
a)
Growth
b)
Reproduction
c)
Repair
d)
All of the above
22.
The phase of mitosis in which the sister chromatids separate from each other
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
23.
In mitosis, the two resulting cells are
a)
different from the starting cell and identical to each other.
b)
different from the starting cell and different from each other.
c)
identical to the starting cell and different from each other.
d)
identical to the starting cell and identical to each other.
24.

A diploid cell has ____ the number chromosomes as a haploid cell.

a)

half

b)

twice

c)

one-fourth

d)

four times

25.

Beginning to attach the mitotic spindle fibers to the kinetochores is a characteristic of which stage of mitosis?

a)

prophase

b)

prometaphase

c)

metaphase

d)

anaphase

26.

Tube-like structures that attach to the centromere of a chromosome

a)

Metaphase Plate

b)

Microtubules

c)

Centrosome

d)

Centrioles

e)

Cleavage Furrow

27.

Identify the circled structure...

a)

Centrioles

b)

Microtubules

c)

Centrosome

d)

Centromere

e)

Cleavage Furrow

28.

A

a)

Kinetochore

b)

Chromosome

c)

Sister Chromatids

d)

Centromere

e)

Cleavage Furrow

29.

C (each of these is called)

a)

Kinetochore

b)

Chromosome

c)

Sister Chromatids

d)

Centromere

e)

Cleavage Furrow

30.

D (located ON this structure, one side)

a)

Kinetochore

b)

Chromosome

c)

Sister Chromatids

d)

Centromere

e)

Cleavage Furrow

31.

E (whole structure)

a)

Kinetochore

b)

Chromosome

c)

Sister Chromatids

d)

Centromere

e)

Cleavage Furrow

32.
a)

Kinetochore

b)

Chromosome

c)

Sister Chromatids

d)

Centromere

e)

Cleavage Furrow

33.

What is the role of protein kinase in a signal transduction pathway?

a)

activates a molecule by adding a phosphate to the target molecule

b)

activates a molecule by removing a phosphate from the target molecule

c)

deactivate a molecule by removing a phosphate from the target molecule

d)

deactivate a molecule by adding a phosphate to the target molecule

34.
This is the cell cycle checkpoint that makes sure DNA has been replicated correctly during S phase.
a)
G1 Checkpoint
b)
G2 Checkpoint
c)
M Checkpoint
d)
I Checkpoint
35.
This is the cell cycle checkpoint that makes sure the correct number of chromosomes are present and attached to microtubules.
a)
G1 Checkpoint
b)
G2 Checkpoint
c)
M Checkpoint
d)
I Checkpoint

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