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Biology Unit 2 Practice Test

Total questions: 127

Worksheet time: 2hrs 26mins

Name
Class
Date
1.

Diffusion is an active process that requires a cell to expend a great deal of energy.

a)

True

b)

False

2.

During diffusion, molecules diffuse from a region where their concentration is low to a region where their concentration is higher until they are evenly dispersed.

a)

True

b)

False

3.

A cell placed in a strong salt solution would probably burst because of an increase in osmotic pressure.

a)

True

b)

False

4.

When the concentration of solutes outside the cell is equal to the concentration of solutes inside the cell, the cell solution is isotonic relative to its environment.

a)

True

b)

False

5.

Diffusion occurs only in living systems.

a)

True

b)

False

6.

The transport of specific particles through a membrane by carrier proteins is known as facilitated diffusion.

a)

True

b)

False

7.

Ion channels are usually able to transport only one type of ion.

a)

True

b)

False

8.

Facilitated diffusion moves molecules and ions in one direction only, while active transport moves them in two directions.

a)

True

b)

False

9.

In active transport, energy is required to move a substance across a cell membrane.

a)

True

b)

False

10.

Both the sodium-potassium pump and the proton pump require energy to move particles across the cell membrane.

a)

True

b)

False

11.

The sodium-potassium pump moves sodium and potassium ions against the concentration gradient.

a)

True

b)

False

12.

Exocytosis helps the cell rid itself of wastes.

a)

True

b)

False

13.

During the process of exocytosis, the cell membrane extends to engulf substances that are too big to pass through the cell membrane.

a)

True

b)

False

14.

The following A,B,C and D are considered:

a)

Catabolism

b)

Anabolism

c)

Substates

d)

Enzymes

15.

The unidentified red structures are considered to be a/an:

a)

Catabolism

b)

Product

c)

Substates

d)

Enzymes

16.

Identify the following diagram

a)

Metabolism

b)

Dehydration

c)

Anabolism

d)

Catabolism

17.

Identify the following structure:

a)

Dehydration synthesis

b)

Catabolism

c)

Anabolism

d)

Metabolism

18.

Which of the following terms specifically describes the metabolic process of breaking down large molecules?

a)

Catabolism

b)

Metabolism

c)

Anabolism

d)

Dehydration

19.

Which of the following statements is TRUE regarding anabolic pathways?

a)

They are used for digesting sugars.

b)

They consume energy to build up polymers from monomers.

c)

They release energy by breaking down polymers into monomers.

d)

They increase the entropy of the organism.

20.

What is the purpose of photosynthesis?

a)

To release energy

b)

To create glucose

c)

To grow

d)

To get oxygen for respiration

21.

Photosynthesis is the process in which humans, and animals use energy from sunlight to produce sugar.

a)

True

b)

False

22.
This is ...
a)
mitochondria
b)
chloroplast
c)
cell
d)
phloem
23.

An organism that produces its own nutrients from inorganic substances or from the environment instead of consuming other organisms.

a)

Autotrophs

b)

Heterotroph

c)

Omnitrophs

d)

Herbitrophs

24.
Which terms best describe autotrophs?
a)
Plants; producers
b)
Animals; producers
c)
Plants; consumers
d)
Animals; consumers
25.
What is another name to describe an autotroph?
a)
Consumer
b)
Producer
26.
From where do autotrophs obtain their energy?
a)
The sun
b)
Other organisms
27.

which of the following statements are TRUE about organisms in the Domain Bacteria

a)

consist of bacteria and cyanobacteria

b)

some are photoautotroph

c)

genetic material is single stranded

d)

organelles are not present

28.

Cyanobacteria are…

a)

Photoheterotrophs

b)

Photoautotrophs

c)

Chemoautotrophs

d)

Chemoheterotrophs

29.
Where does the energy start in this food chain?
a)
Plant
b)
Sun
c)
Deer
d)
Wolf
30.

Autotrophs that convert light energy into chemical energy are called ____.

a)

photoautotrophs

b)

heterotrophs

c)

chemoautotrophs

d)

omnivores

31.

Using the energy of sunlight to make organic molecules from H2O and CO2

a)

Autotrophs

b)

Photoautotrophs

c)

Chemoautotrophs

32.
How can animals and fungi best be classified?
a)
Autotroph
b)
Heterotroph
33.
What is another name to describe a heterotroph?
a)
Consumer
b)
Producer
34.
Organisms that cannot make their own food and must obtain energy from external sources are called
a)
autotrophs
b)
heterotrophs
c)
thylakoids
d)
plants
35.
The ____________ is the most photosynthetic part of a plant.
a)
leaf
b)
flower
c)
roots
d)
stem
36.
The leaf structure that allows carbon dioxide to enter the leaf and Oxygen to exit the leaf is...
a)
phloem
b)
stomata
c)
vein
d)
stem
37.
What part of the leaf allows Carbon dioxide in and oxygen out of the leaf?
a)
xylem
b)
phloem
c)
cuticle
d)
stomata
38.

What color is chlorophyll?

a)

Green

b)

Blue

c)

Red

d)

Purple

39.
The chloroplast has stacked membranes, what is the purpose of the stacked membranes in doing photosynthesis?
a)
water absorption for photosynthesis
b)
increased CO2 absorption
c)
increase surface area
d)
support of the plant
40.

What is the compound that plants use to absorb the energy from sunlight?

a)

Carbon dioxide

b)

Chlorophyll

c)

Nitrogen

d)

H2O

41.
The formula for glucose is...
a)
C12 H22 O11
b)
NaCl
c)
NaOH
d)
C6 H12 O6
42.
Glucose is a ...
a)
sugar
b)
carbohydrate
c)
source of quick energy
d)
all are correct
43.

__________ is the process that plants use to breathe and make food.

a)

Photographs

b)

Oxygen

c)

Hydrogen

d)

Photosynthesis

44.

If plants breathe in carbon dioxide, what do they breathe out?

a)

Nitrogen

b)

Oxygen

c)

Carbon monoxide

d)

Helium

45.

Sunlight is the main source of energy that drives photosynthesis process.

a)

True

b)

False

46.

__________ and ______ are the 2 stages of photosynthesis.

a)

Cellular respiration

b)

Citric Acid C

c)

Light Reactions

d)

Calvin Cycle

47.

What 3 things do plants need for the process of photosynthesis?

a)

Sunlight, oxygen and sugar.

b)

Water, soil and oxygen.

c)

Sunlight, carbon dioxide and water.

d)

Sunlight, soil and water.

48.

The plants gets its nutrients from sugar, called __________.

a)

Galactose

b)

Fructose

c)

Sugar

d)

Glucose

49.

This image correspond to___________.

a)

Flower

b)

Oxygen

c)

Carbon dioxide

d)

Sunlight

50.

this image correspond to ___________.

a)

Water

b)

Chlorophyll

c)

Sunlight

d)

Oxygen

51.
Chlorophyll absorbs ________ light.
a)
red - blue
b)
yellow
c)
green
d)
light greens
52.

Photosynthesis occurs in:

a)

Mitochondria

b)

Chloroplasts

c)

Humans

d)

Animals

53.

Mitochondria and Chloroplasts are:

a)

organelles

b)

cells

c)

only in humans

d)

only in plants

54.
What opens and close the stomata?
a)
guard cells
b)
xylem
c)
phloem
d)
cuticle
55.
Where do the light reactions happen?
a)
mitochondria membrane
b)
thylakoid membrane
c)
stroma
d)
central vacuole
56.
Most plants appear green because chlorophyll
a)
absorbs green light.
b)
absorbs violet light.
c)
reflects green light.
d)
does not absorb violet light.
57.
A leaf is the broadest part of the plant and this is good for photosynthesis because, the broad leaf....
a)
curls up when touched
b)
increases surface area
c)
catches rain water
d)
stores lipids for the plants
58.
the products of photosynthesis are...
a)
glucose and sunlight
b)
carbon dioxide and water
c)
glucose and chlorophyll
d)
oxygen and glucose
59.
The vascular tissue of the plant that transports water is the...
a)
roots
b)
phloem
c)
xylem
d)
stem
60.
The reactant of photosynthesis are...
a)
sunlight and chlorophyll
b)
glucose and oxygen
c)
carbon dioxide and water
d)
sunlight and water
61.
what is the major photosynthetic region of the leaf?
a)
palasade mesophyll layer
b)
spongy layer
c)
guard cells
d)
stomata
62.

What are the reactants in Photosynthesis?

a)

Sun, CO2, glucose

b)

glucose and oxygen

c)

sun, carbon dioxide, water

d)

water, glucose

63.

In photosynthesis, what kind of molecule does hydrogen start in?

a)

water

b)

oxygen

c)

glucose

d)

carbon dioxide

64.

In cellular respiration, carbon starts out in the glucose molecule, but ends up in a(n)

a)

oxygen molecule

b)

water molecule

c)

CO2 molecule

d)

C6H12O2 molecule

65.

In what process does ATP get created?

a)

photosynthesis

b)

cellular respiration

c)

radiation

d)

chemical

66.

How do humans get glucose so they can live?

a)

breathe it in

b)

photosynthesis

c)

eat food

d)

drink liquids

67.

Cellular respiration happens

a)

only in plants

b)

only in animals

c)

only in humans and animals

d)

in plants and animals

68.

Where in a plant cell does photosynthesis take place

a)

Palisade cells

b)

Chlorophyll

c)

Chloroplasts

d)

Vacuole

69.

The products of cellular respiration are

a)

air and water

b)

carbon dioxide, water, and ATP

c)

glucose and carbon dioxide

d)

ATP, glucose, and oxygen

70.

Foods synthesized in the process of Photosynthesis by plants is stored as

a)

Starch

b)

Protein

c)

Vitamins

d)

Fats

71.

Which of these is the correct equation for photosynthesis?

a)

6O2 + C6H12O6 --> 6CO2 + 6H2O

b)

6O2 + 6CO2 --> C6H12O6 + 6H2O

c)

6CO2 + 12H2O --> C6H12O6 + 6H2O + 6O2

d)

6CO2 + 6H2O --> O2 + C6H12O6

72.

Which of these are limiting factors for photosynthesis? Choose 3 answers.

a)

Light intensity

b)

CO2 concentration

c)

Temperature

d)

Light

e)

CO2 levels

73.

Choose the statement that best describes light reaction.

a)

It converts CO2 to sugar molecule

b)

It converts light energy to chemical energy of ATP and NADPH

c)

It takes place in the stroma

74.
What is the main purpose of the light dependent reactions?
a)
To provide the energy for the calvin cycle
b)
To capture energy and make sugar
c)
To reflect green light
d)
To make sugars
75.

What supplies the electrons during photolysis?

a)

oxygen

b)

water

c)

glucose

d)

rubisco

76.

What is the unit of light?

a)

proton

b)

photon

c)

photosystem

77.

Which part of a flower is known to attract pollinators?

a)

Stem

b)

Leaf

c)

Pollen

d)

Colorful Petals

78.

When the number of water molecules outside of the cell is greater than inside the cell, which will most likely occur?

a)

Molecules of water will NOT MOVE either way.

b)

Molecules of water will move OUT of the cell.

c)

Molecules of water will move INTO the cell.

d)

Molecules of water will EVAPORATE.

79.

A cell that is unable to import substances required to process chemical energy is most likely a result of a malfunctioning of the ____________________.

a)

cell membrane

b)

golgi body

c)

endoplasmic reticulum

d)

nuclear envelope

80.

Cell membranes are described as selectively permeable.

Four students were asked to explain what this means. Which one is correct?

a)

Student 1: Cell membranes prevent all materials from entering the cell.

b)

Student 2: Cell membranes only provide structural support for the cell.

c)

Student 3: Cell membranes regulate which substances can enter and exit the cell.

d)

Student 4: Cell membranes allow water and water-soluble substances to enter the cell.

81.

Which part of the cell controls the movement of substances?

a)

mitochondria

b)

cell membrane

c)

chloroplast

d)

nucleus

82.

The thin, semi-permeable membrane that encloses a cell allows nutrients to enter and wastes to be ____________________.

a)

digested

b)

recycled

c)

protected

d)

removed

83.

All of the following are functions of a cell membrane EXCEPT

a)

surrounding and protecting the contents of the cell.

b)

releasing waste products from the cell.

c)

producing energy for the cell processes.

d)

allowing gases to enter the cell.

84.

Why are water molecules able to enter the egg but NOT the sugar molecules?

a)

Sugar molecules are too heavy.

b)

The holes of the semi-permeable membrane were too small to let sugar molecules through.

c)

Semi-permeable membranes need energy.

d)

Semi-permeable membranes must be under pressure to work.

85.
What is diffusion?
a)
when molecules move from a low concentration to a high concentration 
b)
when molecules move from a high concentration to a low concentration.
c)
no movement 
d)
molecules move everywhere
86.
What is the definition of  Selective Permeability?
a)
The movement of materials across the cell membrane that requires NO ENERGY from the cell.
b)
The movement of materials through (or across) the cell membrane
c)
The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
d)
The movement of molecules from an area of high concentration (where the molecules are more crowded together) to a area of low concentration (where molecules are more spread apart)
87.
Osmosis
a)
diffusion of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration
b)
the diffusion of particles from an area of high concentration to an area of low concentration
c)
diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration
d)
the diffusion of particles from an area of low concentration to an area of high concentration
88.
Osmosis is the movement of _____ across a membrane.
a)
food
b)
energy
c)
oxygen
d)
water
89.
_______ regulates what enters and leaves a cell.  
a)
Cell Membrane
b)
Nucleus
c)
Mitochondria
d)
Cytoplasm
90.
Equilibrium?
a)
a large  amount of substance on  side of the cell and a small amount on the other side
b)
a small  amount of substance on  side of the cell and a large amount on the otherside
c)
equal amount of substance on either side of the membrane  
d)
no particles on either side of the a cell membrane
91.
Which way will the water molecules move during osmosis?
a)
Out of the cell, so the cell shrinks.
b)
Out of the cell, so the cell swells.
c)
Into the cell, so the cell shrinks.
d)
Into the cell, so the cell swells.
92.
When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of
a)
Osmosis
b)
Diffusion
c)
Equilibrium
93.

The fluid mosaic model of the membrane proposed that membranes:

a)

consist of a single layer of phospholipids and proteins

b)

consist of a phospholipid bilayer composed of a variety of fatty acids

c)

Consist of protein molecules embedded in a dynamic bilayer of phospholipids

d)

consist of a phospholipid bilayer between two layers of hydrophilic proteins

94.

Where can carbohydrates be found when part of a plasma membrane?

a)

On the outside of the membrane

b)

On the inside of the membrane

c)

Embedded part of the way into the membrane

d)

Embedded the whole way through the membrane

e)

All of the above

95.
What does "bilayer" mean?
a)
one layer
b)
two layers
c)
laminated
d)
bilateral
96.
What does the "fluid mosaic model" mean about the cell membrane?
a)
It can dissolve into fluid.
b)
The cell is mostly made of mosaic molecules.
c)
It looks like a flexible pattern made up of different parts.
d)
Somebody else should name these things.
97.
The function of the plasma membrane is....
a)
to regulate what enters and leaves the cell.
b)
fight bacteria and viruses that enter the cell.
c)
provide rigid support and protection to the cell.
d)
make sure each cell can move
98.

Name the lipid present in cell membrane.

a)

Glycolipid

b)

Phospholipid

c)

Triglyceride

d)

oil

99.

(a)   prevents fatty acid molecules from sticking together.

100.

Number of lipid bilayers present in cell membrane

a)

2

b)

3

c)

4

d)

0

101.
The 'fluid' part of the name for the cell membrane comes from the
a)
 embedded proteins
b)
 lipid tails
c)
phosphate heads
102.
What do the terms hydrophobic and hydrophilic mean?
a)
loves water and hates water
b)
 loves hydrogen and hates hydrogen
c)
hates hydrogen and loves hydrogen
d)
 hates water and loves water
103.
The process of breaking something down into smaller parts.
a)
anabolism
b)
catabolism
104.
 ___________ is the energy-requiring process which joins smaller molecules together to form larger molecules. 
a)
Metabolism
b)
Anabolism
c)
Catabolism
d)
Heat Transfer
105.

Making ATP is an _____________reaction

a)

anabolic

b)

catabolic

106.
Sum total of all chemical reactions in a living thing
a)
metabolism
b)
heredity
c)
evolution
d)
homeostasis
107.

What is the function of ATP in living things?

a)

provides energy for cells

b)

stores genetic information

c)

provides structure in the nucleus

d)

uses fat for energy

108.
Which bond of the ATP molecule is broken in order to release energy?
a)
A
b)
B
c)
C
d)
D
109.
Metabolism is best described as______
a)
synthesis of macromolecules
b)
breakdown of macromolecules
c)
control of enzyme activity
d)
control of enzyme activity in te synthesis and breakdown of macromolecules
110.
____________describes the general process of breaking down large molecules into samller ones.
a)
metabolism
b)
anabolsim
c)
catabolism
d)
dehydration
111.
True or False: Catabolic pathways consume energy to build up polymers from monomers.
a)
True
b)
False
112.
True or False: Enzymes increase the rate of reaction.
a)
True
b)
False
113.
The active site of an enzyme is the region that __________
a)
binds with the allosteric site
b)
binds with the substrate
c)
binds with allosteric inhibitors
d)
is inhibited by a coenzyme or a cofactor
114.
Osmosis is the diffusion of _____ across a membrane
a)
glucose
b)
NaCl
c)
proteins
d)
water
115.
Which of the following is NOT a type of passive transport?
a)
Osmosis
b)
Diffusion
c)
Endocytosis
116.
What is equilibrium?
a)
When concentrations cannot be balanced between two substances 
b)
When concentrations are balanced between two substances 
c)
Making the energy in the top half of your body equal the the energy in the bottom half
d)
Concentrations do not exist 
117.
Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.
a)
True
b)
False
118.
What does semi-permeable mean?
a)
Only some things can move through membrane
b)
Nothing can move through membrane
c)
Reagan can move through membrane
d)
Membrane connot be moved through
119.
What does “high concentration area” mean?
a)
Spread out
b)
Tightly packed together
c)
Uncrowded
d)
Spacious
120.
When particles move from areas of high concentration to areas less concentrated, this has taken place.
a)
diffusion
b)
mitosis
c)
endocytosis
d)
photosynthesis
121.
When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of ___________.
a)
osmosis
b)
equilibrium
c)
diffusion
d)
hypertonic
122.
In a solution, salt is considered the _______.
a)
solvent
b)
solute
c)
solution
123.
 If a cell containing 5% salt is placed into a glass of water with 20% salt, the water is _______ compared to the cell.
a)
hypertonic-
b)
hypotonic
c)
isotonic
124.
This occurs when the molecules are the same throughout. 
a)
homeostasis 
b)
diffusion 
c)
active transport 
d)
equilibrium 
125.
Passive transport requires no
a)
concentration gradients
b)
osmosis
c)
motion
d)
energy
126.

The transport of food into cells involves the action of the sodium-potassium pump and ____________________ channels.

a)

coupled

b)

tripled

c)

Ox

d)

development.

127.

Oxidation reduction

Which of the following describes oxidation?


Select one:

a)

loss of electrons or gain of oxygen

b)

gain of electrons or loss of H atoms

c)

loss of electrons or gain of hydrogen

d)

loss of electrons or loss of oxygen

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