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Unit 3 Test: Cells

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.

Not all cells are alike. Which of the following is NOT a true statement about differences between cells?

a)
Cells come in many different shapes.
b)
Different kinds of cells are different sizes.
c)
Some cells have a nucleus, but others do not.
d)
Most cells have a membrane, but some do not.
2.

Which of the following organisms is an example of a prokaryote?

a)
plants
b)
animals
c)
bacteria
d)
fungi
3.

Which principle of cell theory best supports the idea that new cells will replace damaged cells in a scraped knee?

a)
All living things are made of one or more cells.
b)
Cells are the basic unit of life.
c)
All cells come from other cells.
d)
The nucleus of cells in animals reproduces when exposed to air.
4.

Where can you find ribosomes in the cell?

a)
cytoplasm
b)
rough ER
c)
smooth ER
d)
cytoplasm and rough ER
e)
smooth ER and rough ER
5.

Students come across across a packet of chips and wonder how their body uses it for energy. Which organelle in their cells converts the chemical energy stored in the chips into a more useable energy source (ATP) through the process of cellular respiration?

a)

chloroplast

b)

Golgi apparatus

c)

endoplasmic reticulum

d)

mitochondria

6.

The primary function of the cell wall is to...

a)
support and protect the cell.
b)
store DNA.
c)
direct the activities of the cell.
d)
help the cell move.
7.

If a cell's plasma (cell) membrane stopped working, which of the following would be a logical conclusion?

a)
The cell would not be able to make proteins.
b)
The cell would not be able to regulate materials coming in and out of the cell.
c)
The cell would not be able to sort and package proteins so they can be shipped out of the cell.
d)
The cell would not be able to carry out cellular respiration.
8.

Which of the following statements regarding the movement of molecules across cell membranes is true?

a)
In facilitated diffusion, a molecule is moved across a membrane against its concentration gradient.
b)
Water molecules are commonly actively transported out of cells using ATP energy.
c)
Three examples of passive transport are diffusion, facilitated diffusion, and osmosis.
d)
Polar molecules generally diffuse more readily through the plasma membrane than do nonpolar molecules of the same size.
9.

The diffusion of water across a selectively permeable membrane is called...

a)
osmotic pressure
b)
osmosis
c)
pinocytosis
d)
active transport
10.

In order for the body to function properly, cells must move molecules across the membrane to maintain homeostasis. Which of the following accurately describes a mechanism for maintaining homeostasis at the cellular level?

a)
Passive transport, where ATP is used to facilitate the movement of molecules from high to low concentrations.
b)
Facilitated transport, where enzymes are used to increase the rate of solvent transfer across a membrane.
c)
Active transport, where the solution is pumped across a membrane from high to low concentrations.
d)
Active transport, where molecules are pumped across the cell membrane against the gradient from low to high concentration using ATP energy.
11.

Which term describes the relatively constant internal physical conditions of an organism?

a)
cell specialization
b)
homeostasis
c)
organ system
d)
unicellularity
12.

If frog eggs found in freshwater were placed into semi-salty water, what would happen to the cells?

a)
The eggs would lose water because the salty water is a hypertonic solution
b)
The eggs would lose water because the salty water is a hypotonic solution
c)
The eggs would gain water because the salty water is a hypotonic solution
d)
The eggs would remain the same because the salty water is an isotonic solution compared to the cell
13.

Which of the following statements best describes an organism’s attempt to maintain CELLULAR homeostasis?

a)
a flowering plant bends towards the light
b)
a paramecium’s vacuole expels (gets rid of) excess water from a cell.
c)
a wren lays three eggs in its nest
d)
a pup growls when a litter mate attempts to take its bone.
e)
an earthworm’s DNA is replicated
14.

An organ system, like the digestive system, is a group of organs that...

a)
are made up of similar cells.
b)
are made up of similar tissues.
c)
work together to perform a specific function.
d)
work together to perform all the functions in a multicellular organism.
15.

The rate at which wastes are produced by a cell partially depends on the cell’s _______ and changes to this determine the rate of diffusion within a cell.

a)
ratio of surface area to volume
b)
type of cell membrane
c)
volume
d)
surface area
16.

The process by which a cell grows and divides into two daughter cells is called...

a)
the cell cycle
b)
metaphase
c)
interphase
d)
cytokinesis
17.

When during the cell cycle are chromosomes visible?

a)
only during anaphase
b)
prophase, metaphase, and anaphase
c)
only during metaphase
d)
only during the G1 phase of interphase
18.

During which phase in the cell cycle does DNA replication happen?

a)
G1 phase
b)
G2 phase
c)
M phase
d)
S phase
19.

Which of the following represents the phases of the cell cycle in the proper sequence?

a)
prophase, metaphase, anaphase, telophase
b)
interphase, prophase, metaphase, anaphase, telophase, cytokinesis
c)
anaphase, telophase, metaphase, prophase
d)
prophase, anaphase, telophase, metaphase
20.

Cells grown in a petri dish tend to divide until they form a thin layer covering the bottom of the dish. If cells are removed from the middle of the dish, the cells bordering the open space will begin dividing until they have filled the empty space. What does this experiment show?

a)
Cell division is a completely random process.
b)
Once cells divide, they can never divide again.
c)
The controls on cell growth and division can be turned on and off.
d)
There is only a limited amount of DNA available to a given group of cells.
21.

Cyclins are a family of closely related proteins that...

a)
regulate the cell cycle.
b)
produce p53.
c)
cause cancer.
d)
work to heal wounds.
22.

Which is NOT true of cancer cells?

a)
Cancer cells can migrate to other parts of the body through the process of metastasis
b)
Cancer cells fail to undergo apoptosis.
c)
Cancer cells exit the cell cycle and enter the G0 phase (no longer divide).
d)
Cancer cells ignore signals that should cause them to stop dividing.
23.

During early development, all cells in the embryo of a multicellular organism are identical. Later on in development, the cells will become specialized through a process called...

a)
apoptosis
b)
cytokinesis
c)
differentiation
d)
interphase
24.

How could stem cells prove helpful in the treatment of cardiovascular diseases (disease of the heart)?

a)
Stem cells form white blood cells, which boosts the body’s immunity.
b)
Stem cells divide to form red blood cells, which reduce hypertension.
c)
Stem cells perform apoptosis to remove old cells from the heart muscles.
d)
Stem cells can differentiate to form heart muscle cells.
25.

Describe the solution in the beaker after analyzing the solute concentration.

a)
hypertonic
b)
hypotonic
c)
isotonic

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