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Semester 1 Exam 2024-2025

Total questions: 208

Worksheet time: 17hrs 20mins

Name
Class
Date
1.

All living things are composed of. . . .(building blocks of living things)

a)

Energy

b)

Cells

c)

Atoms

d)

Bugs

2.

Which is NOT an example of adaptation?

a)

camels have humps that store water for the dry days

b)

night animals have special eyes to see in the dark

c)

fishes developed gills to breath underwater

d)

an elephant gives birth to one offspring

3.
Which of the following characteristics of living things best explains why humans sweat when they get hot?
a)
maintaining a stable internal enviornment
b)
growth and development
c)
using energy
d)
ability to reproduce
4.

Whales used to have legs, and a pelvis can still be found in their skeleton. However, after millions of years, they no longer have legs.

a)

Grow and develop

b)

Homeostasis

c)

Respond to stimuli

d)

Evolutionary Adaptation

5.
The scientific name for an organism is made from the:
a)
class and family name
b)
genus and species name
c)
domain and kingdom name
d)
kingdom and phylum name
6.
The 8 levels of classification, most broad to most specific.
a)
Domain, Genus, Family, Order, Class, Phylum, Kingdom, Species
b)
Domain, Species, Kingdom, Genus, Phylum, Family, Class, Order
c)
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
d)
Order, Kingdom, Species, Domain, Phylum, Family, Class, Genus
7.

An illustration and a dichotomous key are given. What is the correct classification for this organism?

a)

Class Insecta

b)

Order Amblygygi

c)

Order Araneae

d)

Order Scorpiones

8.
A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?
a)
Juniper
b)
Pine
c)
Spruce
d)
Fir
9.
According to this cladogram, sharks are MOST closely related to which organism? 
a)
Amphibians
b)
Ray finned fish
c)
Crocodiles
d)
Birds
10.
According to this cladogram, birds are LEAST related to: 
a)
Amphibians
b)
Sharks
c)
Ray Finned Fish
d)
Crocodiles
11.

a)

A

b)

B

c)

C

d)

D

12.

a)

A

b)

B

c)

C

d)

D

13.

a)

A

b)

B

c)

C

d)

D

14.

a)

A

b)

B

c)

C

d)

D

15.

a)

A

b)

B

c)

C

d)

D

16.

a)

A

b)

B

c)

C

d)

D

17.

a)

A

b)

B

c)

C

d)

D

18.

a)

A

b)

B

c)

C

d)

D

19.

a)

A

b)

B

c)

C

d)

D

20.

a)

A

b)

B

c)

C

d)

D

21.

a)

A

b)

B

c)

C

d)

D

22.

a)

A

b)

B

c)

C

d)

D

23.

a)

A

b)

B

c)

C

d)

D

24.

a)

A

b)

B

c)

C

d)

D

25.

a)

A

b)

B

c)

C

d)

D

26.

a)

A

b)

B

c)

C

d)

B

27.

a)

A

b)

B

c)

C

d)

D

28.

a)

A

b)

B

c)

C

d)

D

29.

a)

A

b)

B

c)

C

d)

D

30.

a)

A

b)

B

c)

C

d)

D

31.

a)

A

b)

B

c)

C

d)

D

32.

a)

A

b)

B

c)

C

d)

D

33.

a)

A

b)

B

c)

C

d)

D

34.

a)

A

b)

B

c)

C

d)

D

35.

a)

A

b)

B

c)

C

d)

D

36.

a)

A

b)

B

c)

C

d)

D

37.

a)

A

b)

B

c)

C

d)

D

38.

a)

A

b)

B

c)

C

d)

D

39.

a)

A

b)

B

c)

C

d)

D

40.

a)

A

b)

B

c)

C

d)

D

41.

a)

A

b)

B

c)

C

d)

D

42.

a)

A

b)

B

c)

C

d)

D

43.

a)

A

b)

B

c)

C

d)

D

44.

a)

A

b)

B

c)

C

d)

D

45.

a)

A

b)

B

c)

C

d)

D

46.

a)

A

b)

B

c)

C

d)

D

47.

a)

A

b)

B

c)

C

d)

D

48.

a)

A

b)

B

c)

C

d)

D

49.

a)

A

b)

B

c)

C

d)

D

50.

a)

A

b)

B

c)

C

d)

D

51.

Where in plant and animal cells does aerobic respiration take place?

a)

Mitochondrion

b)

Chloroplast

c)

Ribosomes

d)

Vacuole

52.

In which structure found in a plant cell does photosynthesis take place?

(a)  

53.

Identify the role of ribosomes

a)

Control the cell activity

b)

Contain water and store molecules and ions

c)

Control what substance can enter and leave the cell

d)

Protein synthesis

54.

Identify the structure not found in bacteria

a)

Ribosomes

b)

Nucleus

c)

Cell membrane

d)

Cell wall

55.

Identify the structure found in a bacterial cell

a)

Vacuole

b)

Mitochondrion

c)

Plasmid

d)

Chloroplast

56.

State the term for the watery liquid found in all cells in which many substances are dissolved

(a)  

57.

Identify the structure found in plant AND bacterial cells

a)

Mitochondrion

b)

Cell wall

c)

Nucleus

d)

Plasmid

58.

Chromosomes are made from which chemical substances?

(a)  

59.

Identify the structure that contains water and dissolved molecules and ions

a)

Vacuole

b)

Chloroplast

c)

Ribosomes

d)

Nucleus

60.

Identify the cell in the image

a)

Animal

b)

Plant

c)

Eukaryote

d)

Bacteria

61.

The diagram shows an incomplete plant cell.

Which part of the cell is missing?

a)

Cell membrane

b)

Cell wall

c)

Chloroplast

d)

Vacuole

62.

Which diagram shows one organ only?

a)

A

b)

B

c)

C

d)

D

63.

Which part of a cell contains the genetic material?

a)

The cell membrane of an animal cell.

b)

The cytoplasm of an animal cell.

c)

The nucleus of a plant cell.

d)

The vacuole of a plant cell.

64.

In the pancreas, there are groups of cells that make insulin. What describes these cells?

a)

An organ inside an organism

b)

An organ system inside an organisms

c)

Cells within a cell wall

d)

A tissue inside an organ

65.

The diagram shows a cell from the stem of a plant. Which of the labelled parts would NOT be found in a cell from the root?

a)

Choroplast

b)

Cell wall

c)

Cytoplasm

d)

Vacuole

66.

What is the heart?

a)

Cell

b)

Tissue

c)

Organ

d)

Organ system

67.

The diagram shows a liver cell. Which structures are also found in a root hair cell in a plant?

a)

X, Y and Z

b)

X only

c)

Y only

d)

Z only

68.

Why is the epidermis of a leaf an example of a tissue?

a)

The cells all have a similar structure and function.

b)

The cells allow light to pass through.

c)

The cells allow water to enter them.

d)

The cells are covered by a waxy cuticle.

69.

The diagram shows a cell from a plant leaf.

Which parts are NOT found in animal cells ?

a)

1 and 2

b)

2 and 3

c)

3 and 4

d)

4 and 5

70.

The diagram shows some internal parts of the human body. What do these parts form?

a)

Tissue

b)

Organ

c)

Organ system

d)

Organism

71.

The diagram shows a student’s drawing of two guard cells. Which label line is NOT correct?

a)

A

b)

B

c)

C

d)

D

72.

The diagram shows a section through a leaf. Which structure is an organ and which structure is a tissue?

a)

Organ = P

Tissue = S

b)

Organ = Q

Tissue = R

c)

Organ = R

Tissue = P

d)

Organ = S

Tissue = Q

73.

The diagram shows plant cells. Which two labelled parts are partially permeable?

a)

P and Q

b)

Q and R

c)

R and S

d)

P and S

74.

Which of the following is NOT an organelle?

a)

Chloroplast

b)

Nucleus

c)

Cell Wall

d)

Mitochondrion

75.

Which diagram shows a plant cell?

a)

A

b)

B

c)

C

d)

D

76.

Which of these structures is present in both plant and animal cells?

a)

Cell wall

b)

Chloroplast

c)

Mitochondria

d)

Permanent vacuole

77.

Where in the cell does protein synthesis occur?

a)

Nucleus

b)

Ribosome

c)

Mitochondria

d)

Chloroplast

78.

Where in the cell does aerobic respiration occur?

a)

Nucleus

b)

Ribosome

c)

Mitochondria

d)

Chloroplast

79.

Which cell structure contains DNA in plant and animal cells?

a)

Nucleus

b)

Ribosome

c)

Cytoplasm

d)

Chloroplast

80.

Which of the following organelles is involved in photosynthesis?

a)

Nucleus

b)

Ribosome

c)

Cytoplasm

d)

Chloroplast

81.

Which of these is the correct sequence for levels of organization in an organism?

a)

Tissue → Organ → Organism → Organ system → Cell

b)

Cell → Tissue → Organ → Organ system → Organism

c)

Cell → Organ → Organ system → Tissue → Organism

d)

System → Organ → Tissue → Cell → Organism

82.

What is the main function of the vacuole in plant cells?

a)

To produce proteins

b)

To store cell sap and maintain cell rigidity

c)

To protect the cell from pathogens

d)

To control the cell's activities

83.

Which part of the cell controls the movement of substances in and out of the cell?

a)

Nucleus

b)

Cell wall

c)

Cell membrane

d)

Cytoplasm

84.

Which of the following is a correct characteristic of prokaryotic cells?

a)

They have a true nucleus

b)

They have membrane-bound organelles

c)

They lack a cell membrane

d)

They lack a nucleus

85.

In a multicellular organism, cells with similar structures and functions form what?

a)

Organs

b)

Tissues

c)

Organelles

d)

Organisms

86.

Which statement correctly describes the cell wall in plant cells?

a)

It is made of protein

b)

It regulates the movement of substances in and out of the cell

c)

It is made of cellulose and provides structural support

d)

It is made of chitin and provides structural support

87.

Which three types of organisms have a cell wall?

a)

animals

b)

plants

c)

bacteria

d)

fungi

e)

viruses

88.

What is C?

a)

chloroplasts

b)

cytoplasm

c)

vacuole

d)

nucleus

89.

Which part of the cell labelled in the diagram is where most chemical reactions happen in a cell?

a)

P

b)

Q

c)

R

d)

S

90.

Which cell is an animal cell?

a)

A

b)

B

c)

C

d)

D

91.
What is the diffusion of water only across a cell or semi-permeable membrane?
a)

Active Transport

b)
Diffusion
c)

Osmosis

d)
Passive Transport
92.
What type of cellular transport uses energy?
a)
Passive Transport
b)
Active Transport
c)

Active and passive transports both

93.

Diffusion and osmosis are examples of (a)   transport.

94.
During diffusion
a)
substances (things) moves from high to low concentration
b)
water moves when energy is used
c)
large or oddly shaped molecules move across a cell membrane
d)
water moves from high to low concentration
95.
Where is there a low concentration of dye?
a)
at the bottom of cup
b)
in the color
c)
at the top of cup 
d)
no concenteraion gradient
96.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
97.

Osmosis is the movement of _____ across a semi-permeable membrane.

a)
food
b)
energy
c)
oxygen
d)
water
98.

Semi-permeable means ...

a)

some molecules can pass through but some cannot

b)
the concentration levels are different
c)
it is permanent
d)

all molecules can pass through it

99.
Where is there a high concentration of water?
a)
in the flower
b)
cannot be determined by picture.
c)
in the vase
d)
in the leaves
100.
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
101.

In which type of cellular transport do substances move across a cell membrane without the use of energy?

a)

Passive Transport

b)

Active Transport

c)

Endocytosis

d)

Exocytosis

102.

... is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane.

(a)  

103.

True or False:


In PASSIVE TRANSPORT, energy is required.

a)

True

b)

False

104.

In ACTIVE TRANSPORT, substances move from:

a)

High concentration to low concentration

b)

Low concentration to high concentration

105.
What type of transport is this?
a)

Endocytosis transporting substances to inside of a cell

b)

Facilitated Diffusion with a carrier protein

c)

Active Transport with a carrier protein

d)

Osmosis with a semi-permeable membrane

106.

Which one is the definition of active transport?

a)

movement of particles through the cell membrane from a region of lower concentration to a region of higher concentration using energy in the form of ATP.

b)

passage of water molecules from a region of their higher concentration to a region of their lower concentration through a partially permeable membrane

c)

net movement of molecule from a region of higher concentration to region of lower concentration. Molecule down a concentration gradient

d)

net movement of molecule from a region of lower concentration to region of higher concentration. Molecule down a concentration gradient

107.
The picture is an example of...
a)
active tranport
b)
passive transport
c)
diffusion
d)
osmosis
108.
The roots of a plant contain a high concentration of minerals and the soil contains a lower concentration.  The roots absorb minerals from the soil.  This is an example of
a)
passive transport.
b)
active transport.
c)
diffusion
d)
osmosis
109.

Active transport across a cell membrane from low to high concentration requires (a)  

110.

During ... , substances move from low to high concentration area with the help of energy.




(a)  

111.

Active transport is the movement of large materials across a cell membrane from ______ to ______ concentration




(a)  

112.
Compare the concentrations of the sugar in the cell and the solution.  Which is HYPOTONIC?
a)
Cell
b)
Solution
113.
Which direction will the dots (solute) move without the use of energy?
a)
into the cell
b)
out of the cell
114.
Facilitated diffusion is the movement of materials into and out of the cell
a)
with the use of energy
b)
with the use of proteins but no energy
c)
by moving water
d)
by using ATP
115.
The diagram represents a specialized cell located in the root of a plant. The arrows in the diagram indicate the movement of molecules of oxygen and water into the cell.
Which choice correctly identifies the process responsible for the movement of each type of molecule represented in the diagram?
a)
Water = diffusion
Oxygen = active transport
b)
Water = diffusion
Oxygen = diffusion
c)
Water = active transport
Oxygen = active transport
d)
Water = active transport
Oxygen = diffusion
116.

Which CELL contains MORE particles than are found in the surrounding solution?

a)

Left

b)

Center

c)

Right

117.
When plant cells lose water to their environment the membrane collapses.  This is called
a)
reverse osmosis
b)
active transport
c)
plasmolysis
d)
selectively permeability
118.
In this situation, where the solute is illustrated by red dots, predict if will WATER move into or out of the cell, and how that will affect the cell.
a)
Water will move into the cell and the cell will expand.
b)
Water will move into the cell and the cell will shrink.
c)
Water will move out of the cell and the cell will expand.
d)
Water will move out of the cell and the cell will shrink.
119.
Which illustration of transport across the membrane requires energy?
a)
A
b)
B
c)
C
d)
D
120.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
121.
With what 3 letters do enzymes typically end?
a)
-ose
b)
-ase
c)
-ese
d)
-tic
122.

Enzymes are an example of

a)

Lipids

b)

Carbohydrate

c)

Protein

d)

Nucleic Acid

123.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
124.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
125.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
126.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
127.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
128.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
129.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
130.

What happens when enzymes are heated to a high temperature?

a)

The enzymes die.

b)

The shape of the enzyme are changed and it denatures

c)

The enzymes' amino acid sequence changes.

d)

The enzymes remain the same

131.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
132.
Which of these is most likely an enzyme?  
a)
Sucrose
b)
Galactose
c)
Fructose
d)
Amylase
133.

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.

134.

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

135.

What is the optimal pH for this enzyme?

a)

6

b)

10

c)

9

d)

7

136.

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

a)

lock and key

b)

hammer and nail

c)

jigsaw puzzle

d)

seesaw

137.

Where do substrates bind to an enzyme?

a)

calcium channels

b)

active site

c)

receptor molecules

d)

voltage-gated channels

138.

What is the optimal temperature of this enzyme?

a)

60

b)

40

c)

70

d)

30

139.
What factors affect an enzyme's reaction rate?
a)
temperature 
b)
pH
c)
substrate concentration
d)
all of these
140.
What are the four biological molecules?
a)
proteins, carbohydrates, lipids, nucleic acids
b)
A, T, C, G
c)
water, air, earth, and fire
d)
Joe, Nick, and Kevin Jonas
141.
Which of these is NOT true?
a)
Enzymes can denature (change shape) when the temperature gets too high.
b)
Enzymes can only be used once in a chemical reaction. 
c)
Extreme pH can denature enzymes.
d)
Enzymes speed up chemical reactions. 
142.
At high temperatures enzyme activity declines because of:
a)
Denaturation
b)
Decreased Kinetic Motion
c)
Increased H-Bonding
d)
Dissociation of Ionic Compounds
143.

Identify the process in the image used to transport substances into and out of cells

(a)  

144.

Identify the process that involves the net movement of water across a partially permeable membrane

a)

Phagocytosis

b)

Diffusion

c)

Osmosis

d)

Active transport

145.

Identify the process in the image

(a)  

146.

Identify the process used to move oxygen into a cell

a)

Osmosis

b)

Active transport

c)

Phagocytosis

d)

Diffusion

147.

Identify the structures in the image that give the lining of the small intestine a very large surface area for the absorption of digested food

(a)  

148.

Identify the process that moves substances against the concentration gradient

a)

Active transport

b)

Diffusion

c)

Osmosis

d)

Phagocytosis

149.

Identify the structures in the image that are found in lungs and give them a very large surface area for gas exchange

(a)  

150.

Molecules and ions possess which type of energy that causes them to move randomly?

a)

Heat

b)

Chemical

c)

Kinetic

d)

Light

151.

Identify the process that requires the cell to use energy

a)

Diffusion

b)

Active transport

c)

Osmosis

d)

Gas exchange

152.

Identify the process in the image that has occurred due to the plant cells being placed in a very concentration salt solution

(a)  

153.

All living things are composed of one or more cells.

a)

True

b)

Falso

154.

The ________ controls the movement of materials into and out of the cell.

a)

cell membrane

b)

nucleus

c)

cytoplasm

d)

mitochondrion

155.

What structure in a plant cell enables the cell to capture energy from the Sun?

a)

cell wall

b)

chloroplast

c)

mitochondrion

d)

central vacuole

156.

Which type of cell can make its own food?

a)

animal

b)

plant

157.

In which organelle are molecules packaged in preparation for distribution throughout the cell?

a)

mitochondrion

b)

vacuole

c)

cytoskeleton

d)

Golgi apparatus

158.

____________ is the gel-like substance found in a cell?

a)

cytoplasm

b)

chlorophyll

c)

water

159.

The _______________ surrounds the cell material.

a)

chromosome

b)

cell membrane

c)

cytoplasm

160.

Lysosomes in the cell work to

a)

get rid of wast

b)

provide protein

c)

store all information

161.

What is the basic unit of structure and function in all living things?

a)

cell

b)

organism

c)

atom

d)

plasma

162.

The __________ is the control center of a cell.

a)

mitochondrion

b)

nucleus

c)

vacuole

163.

Which cell part protects and provides shape for a plant cell?

a)

nucleus

b)

mitochondrion

c)

vacuole

d)

cell wall

164.

The splitting of a cell into two separate cells is

a)

division

b)

mitosis

c)

diffusion

165.

The __________ produces energy in the cell.

a)

mitochondrion

b)

nucleus

c)

vacuole

166.

What is the smallest unit of any organism that is capable of independent function?

a)

tissue

b)

cell

c)

organ

d)

muscle

167.

The DNA is found in the ________ of a prokaryote.

a)

cytoplasm

b)

nucleus

168.

An individual's "fingerprint" is carried by the

a)

cell membrane

b)

DNA

c)

mitochondria

d)

RNA

169.

Both plant and animal cells have a cell membrane.

a)

True

b)

False

170.

Which statement about plant and animal cells is correct?

a)

Animal cells are irregular in shape; plant cells are regular in shape.

b)

Animal cells are regular in shape; plant cells are irregular in shape.

c)

Both animal and plant cells are irregular in shape

d)

Both animal and plant cells are regular in shape.

171.

Suppose you were to examine plant and animal cells under a microscope. Which structures would you find in both cell types?

a)

cell wall, endoplasmic reticulum, and Golgi body

b)

cell wall, cytoplasm, and Golgi body

c)

nucleolus, ribosomes, and endoplasmic reticulum

d)

all of the above

172.

A cell membrane works to

a)

store all information

b)

give the cell support

c)

keep thing in and out of the cell

d)

get rid of waste

173.

Which type of large, biological molecule are enzymes made of?

(a)  

174.

What is the name of the part of an enzyme that binds to the substrate molecule?

(a)  

175.

What is the name of the molecule that can bind to the active site of the enzyme?

(a)  

176.

What word describes any substance that speeds up a chemical reaction but do not get changed or used up themselves?

(a)  

177.

What 3 letters are found at the end of the names of most enzymes?

(a)  

178.

Which element is not found in carbohydrates?

a)

Carbon

b)

Nitrogen

c)

Oxygen

d)

Hydrogen

179.

Which element is not common to both proteins and lipids?

a)

Carbon

b)

Nitrogen

c)

Hydrogen

d)

Oxygen

180.

What is the name of the building block that proteins are made from?

a)

Amino Acid

b)

Fatty acid

c)

Glycerol

d)

Simple sugar

181.

Which of the following factors would not affect the rate of an enzyme-controlled reaction?

a)

Temperature

b)

pH

c)

Concentration of enzyme

d)

Concentration of product

e)

Concentration of substrate

182.

Which statement is true about enzymes?

a)

The shape of an enzyme's active site matches the shape of its substrate

b)

Enzymes are used up in biological reactions

c)

Enzymes work faster at higher temperatures

d)

Every enzyme has one specific substrate that it breaks down or builds up.

183.

The graph shows the effect of temperature on an enzyme. Which statement explains the trend from 10-70oC?

a)

As temperature increases, enzyme activity increases

b)

70oC is the optimum temperature for this enzyme

c)

As temperature increases, enzymes become denatured.

d)

As temperature increases, enzyme activity decreases.

e)

As temperature increases, molecules gain more kinetic energy and have more successful collisions

184.

What does the term optimum mean for enzyme temperature? Select the best description.

a)

The lowest temperature at which the enzyme works to form enzyme-substrate complexes

b)

The temperature which gives the highest enzyme activity forming the maximum number of enzyme-substrate complexes

c)

The highest temperature before denaturing occurs

185.

Which of these statements about enzymes is true?

a)

Temperature does not affect their activity

b)

They can be reused

c)

They lower the activation energy of a reaction

186.

Which statement about the optimum pH for an enzyme is correct?

a)

It is the pH at which the enzyme's activity is greatest with the maximum number of enzyme-substrate complexes being formed

b)

It is the same for all enzymes

c)

It is the pH at which the enzyme cannot be damaged by heat

187.
What is the purpose  of an enzyme?
a)
give permission for the reaction
b)
raise activation energy
c)
speed up reactions
d)
control how many reactions occur
188.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
189.
Any substance that is acted upon by an enzyme is called a(n)?
a)
Coenzyme
b)
Substrate
c)
Vitamin
d)
Polypeptide
190.
After the enzyme and substrate bind together and perform the reaction, what does the substrate become?
a)
a substrate
b)
an enzyme
c)
a product
d)
an active site
191.
In the diagram, what is letter A? 
a)
product
b)
substrate
c)
enzyme-substrate complex
d)
active site
192.
Letter D...
a)
active site
b)
enzyme
c)
substrate
d)
products
193.
Letter B...
a)
active site
b)
enzyme
c)
substrate
d)
products
194.
Letter C...
a)
active site
b)
enzymes
c)
substrate
d)
products
195.
Letter E...
a)
active site
b)
enzyme
c)
substrate
d)
products
196.
Enzymes provide a site where reactants called substrates can be brought together in an enzyme-catalyzed reaction. The site is called the
a)
enzyme substrate complex.
b)
reaction site.
c)
active site.
d)
lock and key.
197.
Based on the graph, what is the optimal temperature for this enzyme? 
a)
15oC
b)
40oC
c)
30oC
d)
35oC
198.
An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 
a)
true
b)
false
199.
What is a substance called if it speeds up a chemical reaction?
a)
reusable
b)
catalyst
c)
specific
d)
fragile
200.
Each enzyme only has 1 substrate that will fit its active site.  What is this called?
a)
reusablility
b)
denaturation
c)
specificity
d)
fragility
201.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered denature
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
202.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
203.

What is the optimal pH for this enzyme?

a)

6

b)

10

c)

9

d)

7

204.

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

205.
Some bacteria live in hot springs. Their cells contain enzymes that function best at temperatures of 70 °C or higher. At the temperature of 50 °C, how will the enzymes in these bacterial cells most likely be affected?
a)
The enzymes will be destroyed by lysosomes
b)
The enzymes will lose their bond structure and fall apart.
c)
The enzymes will require less energy to function than at 70 °C.
d)
The enzymes will not increase the rate of reactions as much as they would at 70 °C. 
206.

The graph shows how the activity of an enzyme changes over a range of pH values.


Which of the following conclusions can be drawn from this graph?

a)

The optimum pH of the enzyme is 5.8

b)

The optimum pH of the enzyme is 6.6

c)

The enzyme’s activity continually increases as pH increases from 5.0 to 9.0

d)

The enzyme’s activity is greater around pH of 8.0 than around pH of 5.0

207.

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

208.

At high temperatures enzyme activity declines because of:

a)

Denaturation

b)

Enzyme death

c)

Movement

d)

It doesn´t

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Unit 1 - 4 AP Bio Review

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9th - 12th Grade