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Unit 2 and 3 Review

Total questions: 84

Worksheet time: 2hrs 56mins

Name
Class
Date
1.
What process occurs when WATER diffuses across a membrane?
a)
endocytosis
b)
mitosis
c)
osmosis
d)
nuclear fission 
2.
What does “high concentration area” mean?
a)
Spread out
b)
Tightly packed together
c)
Uncrowded
d)
Spacious
3.
When particles move from areas of high concentration to areas less concentrated, this has taken place.
a)
diffusion
b)
mitosis
c)
endocytosis
d)
photosynthesis
4.
Why is diffusion and osmosis important to cells?
a)
It allows them to take in materials without using energy.
b)
It allows them to reproduce.
c)
It allows them to absorb sunlight.
d)
It allows cells to use all energy.
5.
What does selectively-permeable mean?
a)
The cell controls what passes in and out of the cell
b)
Nothing gets through
c)
The cell lets only large substances through
6.
What is diffusion?
a)
when molecules move 
b)
when molecules move from a high concentration to a low.
c)
no movement 
d)
molecules move everywhere
7.
During osmosis
a)
water moves from high to low concentration
b)
large or oddly shaped molecules move across a cell membrane
c)
water moves when energy is used
d)
proteins are built
8.
Permeable means
a)
things can pass through
b)
the concentration levels are different
c)
it is permanent
d)
things are stuck
9.
Movement of particles from high to low concentration. 
a)
Passive Transport
b)
Active Transport
10.

Particle of movement from an area of lower concentration to an area of higher concentration.

a)

Active transport

b)

Passive transport

11.

Particle of movement from an area of higher concentration to an area of lower concentration.

a)

Active transport

b)

Passive transport

12.

Which type of transport uses energy in the form of ATP to transport substances?

a)

Active transport

b)

Passive transport

13.

Which type of transport does not use energy to transport substances?

a)

Active transport

b)

Passive transport

14.

Which type of passive transport uses transport proteins to transport items such as glucose through the membrane?

a)

Facilitated diffusion

b)

Osmosis

c)

Diffusion

15.

Which type of passive transport focuses on the movement of water through the membrane?

a)

Facilitated diffusion

b)

Osmosis

c)

Diffusion

16.

Which type of passive transport occurs when molecules move randomly from high to low concentration like color dye in a beaker?

a)

Facilitated diffusion

b)

Osmosis

c)

Diffusion

17.

Which type of diffusion is represented?

a)

Facilitated diffusion

b)

Osmosis

c)

Diffusion

18.

Which type of diffusion is represented?

a)

Facilitated diffusion

b)

Osmosis

c)

Diffusion

19.

Which type of diffusion is represented?

a)

Facilitated diffusion

b)

Osmosis

c)

Diffusion

20.

Which type of solution has a greater solute concentration INSIDE of the cell?

a)

Hypertonic

b)

Hypotonic

c)

Isotonic

21.

Which type of solution has a greater solute concentration OUTSIDE of the cell?

a)

Hypertonic

b)

Hypotonic

c)

Isotonic

22.

Which type of solution has the same solute concentration inside of and outside of the cell?

a)

Hypertonic

b)

Hypotonic

c)

Isotonic

23.

The cell shrunk in size, which means it was placed in a ____ solution.

a)

Isotonic

b)

Hypertonic

c)

Hypotonic

24.

The cell expanded in size to the point of lysing (bursting), which means it was placed in a ____ solution.

a)

Isotonic

b)

Hypertonic

c)

Hypotonic

25.

The cell shows water moving in and out equally, which means it was placed in a ___ solution.

a)

Isotonic

b)

Hypertonic

c)

Hypotonic

26.

Which type of active transport uses transport proteins to help pump molecules across the membrane?

a)

Membrane pumps

b)

Endocytosis

c)

Exocytosis

27.

Which type of active transport is displayed?

a)

Endocytosis

b)

Exocytosis

28.

Which type of active transport uses a vesicle to allow a large molecule to exit the cell?

a)

Endocytosis

b)

Exocytosis

29.

___ is reached when there are stable internal and external cell conditions.

a)

Energy

b)

Active transport

c)

Homeostasis

d)

Passive transport

30.

The substance that binds to an enzyme is called a?

a)

Polypeptide

b)

Co-enzyme

c)

Vitamin

d)

Substrate

31.

Which of the following best explains why enzymes are necessary for reactions in our cells?

a)

The reactions are too slow to meet the needs of the cell if enzymes are missing.

b)

Enzymes supply the oxygen necessary for the reactions.

c)

Enzymes change reactants from solid to liquid during the reactions.

d)

The reactions take up too much space in the cell if enzymes are missing.

32.

Changes in pH and temperature can ___________________ an enzyme which causes it to lose its shape and affects its function.

a)

puncture

b)

denature

c)

double

d)

delete

33.

What is the optimal pH for this enzyme?

a)

6

b)

10

c)

9

d)

7

34.

The ____________________ mechanism describes how each substrate must fit into the enzyme.

a)

lock and key

b)

hammer and nail

c)

jigsaw puzzle

d)

seesaw

35.

What is the purpose of an enzyme?

a)

control how many reactions occur

b)

raise activation energy

c)

give permission for the reaction

d)

speed up chemical reactions

36.

Where do substrates bind to an enzyme?

a)

calcium channels

b)

active site

c)

receptor molecules

d)

voltage-gated channels

37.

Once a new product leaves an enzyme, the enzyme is unchanged and ready for the next substrate. What is this called?

a)

fragile

b)

reusable

c)

specific

d)

catalyst

38.

After the enzyme and substrate bind together and perform the reaction, what does the substrate become?

a)

a substrate

b)

an active site

c)

an enzyme

d)

a product

39.

Enzymes are _______________ that _____________________ chemical reactions by ____________ the amount of activation energy required to start the reaction.

a)

carbohydrates, slow down, lowering

b)

proteins, speed up, increasing

c)

lipids, speed up, lowering

d)

proteins, speed up, lowering

40.

What is the optimal temperature of this enzyme?

a)

60

b)

40

c)

70

d)

30

41.

Which letter represents the product?

a)

A

b)

B

c)

C

d)

D

42.

Which enzyme represents the substrate?

a)

A

b)

B

c)

C

d)

D

43.

Which letter represents the enzyme?

a)

A

b)

B

c)

C

d)

D

44.

Exothermic reactions:

a)

release energy

b)

absorb energy

45.

Endothermic reactions:

a)

release energy

b)

absorb energy

46.
The maintenance of an organism’s internal environment is called:
a)
compensating
b)
homeostasis
c)
balancing
d)
routine
47.
If the environment gets cold, we will often shiver in order to:
a)
keep body temperature the same as the external temperature
b)
decrease body temperature
c)
increase body temperature
d)
regulate blood pressure
48.
Homeostasis
a)
allows for a wildly fluctuating internal environment
b)
is impossible in vertebrates
c)
is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
d)
is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation
49.

Why is the sensation of thirst important to maintaining homeostasis?

a)

Water removed by the kidneys must be replaced

b)

Oxygen cannot diffuse into cells if a person is dehydrated

c)

Water molecules are needed to carry carbon dioxide waste to the kidneys

50.

Why does pulse rate increase during exercise?

a)

Oxygen and carbon dioxide must be removed from the body ASAP

b)

Gas exchange must happen more quickly than when a person is at rest

c)

Oxygen must be moved to the lungs and carbon dioxide must be moved to cells more quickly

d)

Carbon dioxide must be moved to the kidneys to be excreted

51.

The group of organisms that use the process of homeostasis includes

a)

mammals, only

b)

animals, only

c)

plants and animals

d)

all living things

52.
The tendency of an organism to maintain a balanced state in order to stay healthy.
a)
Stimuli
b)
Response
c)
Tropism
d)
Homestasis
53.

If a person's blood cells shrivel (shrink) their blood is likely

a)

isotonic

b)

hypotonic

c)

hypertonic

54.

Which of the following is most likely to cause a person's blood cells to burst?

a)

eating many salty foods

b)

eating many greasy foods

c)

drinking small amounts of water

d)

drinking very large amounts of water

55.

Which of the following is NOT an example of homeostasis?

a)

A human producing gametes

b)

A plant bending toward sunlight

c)

A bird drinking water when thirsty

d)

A dog stealing chicken off the kitchen counter when hungry

56.
Which organelle performs PHOTOSYNTHESIS?
a)
Chloroplast
b)
Mitochondria
57.
What is the ultimate ORIGINAL source of energy for living things
a)
Sugar
b)
Sun
c)
Moon
d)
Carbon Dioxide
58.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
59.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
60.
Leaves look green because.....
a)
they eat their vegetables
b)
to blend into their environment
c)
they contain a molecule named chlorophyll
d)
they are sick
61.
What is the function of NADPH and ATP?
a)
They absorb light
b)
They power the light-dependent reactions
c)
They are light-reflecting pigments
d)
They are short term energy carriers
62.
After photosynthesis, plants store their energy as _________ .
a)
chlorophyll
b)
pigment
c)
glucose (sugar)
d)
Oxygen
63.
What gas goes into the plant before photosynthesis?
a)
Carbon Dioxide
b)
Carbon Monoxide
c)
Oxygen
d)
Nitrogen
64.

Where do the dark reactions (Calvin cycle) take place?

a)

thylakoid membrane

b)

lumen

c)

stroma

65.
What are the two products of the light reactions that are needed for the calvin cycle?
a)
NAD and NADPH
b)
NADP + and Glucose
c)
NADPH and ATP
d)
Oxygen and NADPH
66.
What is the main chemical compound that stores and releases energy?
a)
ATP
b)
Cytoplasm
c)
PTP
d)
Oxygen
67.
What do plants need for the photosynthesis process?
a)
a camera and tripod
b)
light, carbon dioxide, and water
c)
roots, flowers, and bees
d)
soil, air, and oxygen
68.
What is the main purpose of the light reactions?
a)
To provide the energy and electrons for the calvin cycle
b)
To capture energy and make sugar
c)
To reflect green light
d)
To make sugars
69.
What are the reactants of photosynthesis?
a)
carbon dioxide and oxygen
b)
water and oxygen
c)
carbon dioxide and water
d)
water and glucose
70.

Which equation represents Cellular Respiration

a)

b)

c)

d)

71.

Which of the following is a reactant Cellular Respiration?

a)

Oxygen

b)

Carbon Dioxide

c)

Water

d)

Sunlight

72.

Which of the following is a reactant Cellular Respiration?

a)

Sunlight

b)

CO2

c)

H20

d)

C6 H12 O6

73.

Which of the following is the symbol for Glucose?

a)

O2

b)

CO2

c)

H20

d)

C6 H12 O6

74.

Cellular Respiration is an aerobic process which means it requires Oxygen.

a)

True

b)

False

75.

What organelle does cellular respiration take place?

a)

Chloroplast

b)

Cell Wall

c)

Mitochondria

d)

Central Vacuole

76.

What type of organism makes it's own food?

a)

Autotroph

b)

Heterotroph

c)

Consumer

d)

Omnivore

77.

What type of organism has to consume energy?

a)

Producers

b)

Plant

c)

Autotroph

d)

Heterotroph

78.

Which kind of organism undergoes Cellular Respiration?

a)

Autotroph

b)

Heterotroph

c)

Plant

d)

Producers

79.

What is the best definition for cellular respiration?

a)

A process in which glucose is broken down to be used for energy.

b)

A process in which Carbon Dioxide is used to break down Glucose.

c)

The process in which animals make their own energy.

80.

Click on the two products of Cellular Respiration?

a)

H2O

b)

O2

c)

CO2

d)

C6 H12 O6

81.

According to the graph, what happens when the temperature increases?

a)

respiration rate decreases

b)

respiration rate increases

c)

respiration rate levels off

d)

respiration rate increases then decreases

82.

Based of the information in the graph, what inference can be made?

a)

There were 10 measurements taken.

b)

Average respiration rate is measured in beats per minute.

c)

As the respiration rate increases the amount of oxygen produced increases.

d)

As the temperature increases more carbon dioxide is produced.

83.

What do photosynthesis and cellular respiration have in common?

a)

They both require Sun light.

b)

Both are carried on by heterotrophs

c)

They both create energy for an organism to use.

d)

They both transform energy for an organism to use.

84.

In 1940, Danielli and Davson proposed that the cell membrane was a bilayer of phospholipids. These phospholipids were sandwiched between two continuous layers of proteins as shown.

Which of the following BEST modifies the Danielli-Davson model of the cell membrane?

a)

b)

c)

d)

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