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Unit 4 AP Biology (Cell Communication & Cell Cycle)

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Blood glucose level is high, pancreas releases insulin. The insulin causes the cells to take up blood sugar so the sugar level decreases. Which type of feedback is described above?

a)

Positive

b)

Negative

2.

Which extracellular component aids in direct cell-cell communication?

a)

Cell Wall

b)

Cytoskeleton

c)

Glycolipid

d)

Secretory Vesicle

3.

Predict what would happen if overactive pituitary with TSH release.

a)

TRH levels decrease

b)

TRH levels increase

c)

TRH levels stay the same

4.

Signaling where a ligand binds to a nearby cell is known as...?

a)

Autocrine

b)

Hormonal

c)

Paracrine

d)

Synaptic

5.

Crossing Over?

a)

Does NOT occur

b)

Does occur

6.

An inhibitor that binds to the active site, inhibiting the substrate.

a)

Allosteric Inhibitor

b)

Competitive Inhibitor

c)

Noncompetitive Inhibitor

d)

Repressor Inhibitor

7.

Muscle contraction occurs when calcium binds in the muscle cells. Where is the calcium stored in the muscle cells?

a)

Lysosome

b)

Nucleus

c)

Smooth ER

d)

Vacuole

8.

Which of the following act as secondary messengers?

a)

ATP and Ca2+

b)

Ca2+ and cAMP

c)

cAMP and ligand

d)

Ligand and ATP

9.

Which phase involves single chromatids moving to poles?

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

10.

Cancer treatment involves chemotherapy with drugs that inhibit microtubules from depolymerizing. Which phase would the cell be stopped in?

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

11.

Interphase occurs ____ mitosis in the cell cycle.

a)

After

b)

Before

c)

During

12.

A mutation in a relay molecule can affect the response.

a)

True

b)

False

13.

The ligand travels through the signal transduction path.

a)

True

b)

False

14.

Oxytocin is released to initiate contractions, the force of the baby on the cervix leads to release of oxytocin, which causes more contractions. What type of feedback is described?

a)

Negative

b)

Positive

15.

Where is the receptor for a protein hormone located?

a)

Intracellular

b)

Membrane Bound

16.

Ligands are specific to the type of cell they bind to.​

a)

True

b)

False

17.

Which of the following is a secondary messenger?

a)

ATP

b)

Ca2+

c)

Hormone

d)

Ligand

18.

Binds to turn on or off gene expression

a)

DNA polymerase

b)

Promoter

c)

RNA polymerase

d)

Transcription factor

19.

Which phase involves nuclear envelope forming?

a)

Anaphase

b)

Metaphase

c)

Prophase

d)

Telophase

20.

Calcium is stored in the smooth ER and allows for muscular contractions. How is calcium released from the smooth ER?

a)

Active transport

b)

Gated ion channel

c)

Ion channel

d)

Simple diffusion