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Unit 3: Enzymes, ATP, and Energy Flow

Total questions: 60

Worksheet time: 2hrs 26mins

Name
Class
Date
1.

Enzymes are an example of

a)

lipids

b)

carbohydrates

c)

protein

d)

nucleic acid

2.

Each enzyme only has 1 substrate that will fit its active site.  What is this called?

a)

reusable

b)

catalyst

c)

fragile

d)

specific

3.

In the diagram, what is letter A?

a)

product

b)

enzyme-substrate complex

c)

substrate

d)

active site

4.

Letter D...

a)

enzyme

b)

active site

c)

substrate

d)

products

5.

Letter B...

a)

substrate

b)

active site

c)

enzyme

d)

products

6.

Letter C...

a)

products

b)

substrate

c)

enzymes

d)

active site

7.

Letter E...

a)

active site

b)

products

c)

substrate

d)

enzyme

8.

An enzyme speeds up a reaction by

a)

raising the activation energy

b)

lowering the activation energy

c)

releasing energy

d)

absorbing energy.

9.

What happens when enzymes are heated to a high temperature?

a)

The shape of the enzyme are changed and it denatures

b)

The enzymes die

c)

The enzymes' amino acid sequence changes

d)

The enzymes remain the same

10.

What happens to an enzyme when it is denatured?

a)

Activation energy is lowered

b)

It becomes stronger

c)

It loses its shape

d)

Activation energy is raised

11.

Absorbs energy

a)

endothermic reaction

b)

exothermic reaction

12.

Releases energy

a)

endothermic reaction

b)

exothermic reaction

13.

Substances that are changed during a chemical reaction

a)

reactants

b)

products

14.

Which suffix (word ending) is used in the names of most enzymes?

a)

-ase

b)

-in

c)

-ine

d)

-ose

15.

Each enzyme produced by the body is

a)

open - meaning it is able to catalyze a reaction with any molecule.

b)

immature - meaning it cannot catalyze a reaction until many years later.

c)

incomplete - meaning it requires other parts before it is able to bind to a molecule.

d)

specific - meaning it is only able to catalyze a rection with a certain molecule.

16.

Which of the following two factors affect an enzyme's operation the most?

a)

amount of light and temperature

b)

blood glucose and pH

c)

temperature and pH

d)

amount of light and pressure

17.

Why are enzymes needed for life?

a)

They speed up all the chemical reactions in living things.

b)

They are the main proteins that make up our body structure.

c)

The provide energy to all living things.

d)

They provide genetic information.

18.

What is activation energy?

a)

the energy from the sun

b)

the energy produced by an enzyme

c)

the energy needed to get a reaction going

d)

none of these

19.

Which labeled part is the substrate?

a)

letter A

b)

letter B

c)

letter D

d)

letter E

20.

In the lock-and-key model of enzyme action, the __________ fits into the __________ of the enzyme.

a)

product; substrate

b)

active site; product

c)

substrate; active site

d)

active site; substrate

21.
When a molecule can occupy the same active site as the substrate, a situation called __________________ can result
a)
Competitive lnhibition
b)
Allosteric Regulation
c)
Non-Competitive Inhibition
d)
Feedback Inhibition
22.
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
23.

Chemical reactions

a)

proteins that speed up chemical reactions

b)

Changing substances by breaking and forming bonds (includes hydrolysis and dehydration reactions)

c)

the capacity for doing work

d)

the energy needed to start a chemical reaction

24.

Enzymes can be reused over and over again.

a)

True

b)

False

25.
The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?
a)
Enzymes increase the energy of the reactants.
b)
Enzymes decrease the energy level of the products.
c)
Enzyme decrease the activation energy of the reaction.
d)
Enzymes reverse the direction of the reaction.
26.
Enzymes will make a reaction go _______ and use ______ energy.
a)
faster, less
b)
faster, more
c)
slower, less
d)
slower, more
27.

What does A represent?

a)

Ribose

b)

Adenine

c)

Phosphate groups

d)

high energy bonds

28.

What is the molecule called?

a)

ATP

b)

ADP

c)

DNA

d)

Nitrogenous base

29.

What part of ATP does B represent?

a)

Nitrogenous base

b)

Adenine

c)

Ribose

d)

Phosphate groups

30.

How many phosphate groups does ADP have?

a)

1

b)

2

c)

3

d)

4

31.

How is energy released from ATP?

a)

add a phosphate

b)

remove a phosphate

c)

eat food

d)

break off ribose

32.

What does C represent?

a)

phosphate group

b)

high energy bond

c)

ribose

d)

adenine

33.
What is the function of ATP in living things?
a)
provides energy for cells
b)
stores genetic information
c)
provides structure in the nucleus
34.
Which structures shown in the Figure make up the ADP molecule?
a)
A and B
b)
A, B and C
c)
A, B, C, and D
d)
C and D
35.
What does the "TP" in ATP stand for?
a)
2 phosphates
b)
tri (3) phosphates
c)
Two proteins
d)
tri (3) proteins
36.
Which of the following results in the storage of energy in terms of the ATP/ADP cycle?
a)
The breaking of the bond between the 5-carbon sugar and the 1st phosphate group
b)
The addition of a phosphate group
c)
The removal of a phosphate group
d)
The addition of glucose 
37.
Which cellular organelle is responsible for manufacturing ATP?
a)
Ribosome
b)
Nucleus
c)
Mitochondria
d)
Chloroplast
38.
The chemical energy used for most cellular processes and functions is found in___.
a)
ATP
b)
ADP
c)
carbohydrates
d)
the sun
39.

All of the following are parts of an ATP molecule except:

a)

Adenine

b)

Ribose

c)

Ribosomes

d)

Phosphates

40.

What is the substance that is produced in a chemical reaction

a)

catalyst

b)

solution

c)

product

d)

reactant

41.

What is this an example of?

a)

Food chain

b)

Food web

c)

Energy pyramid

d)

Energy web

42.
Which is the best definition of a food chain?
a)
a model of consumers providing energy to producers
b)
a method for growing plants without soil
c)
a process by which plants make food from energy in sunlight
d)
a path by which energy flow from one living thing to another
43.

Which of the following is a primary consumer in a food chain?

a)

predators

b)

herbivores

c)

carnivores

d)

omnivores

44.

Organisms that obtain energy by feeding on other organisms

a)

Producer

b)

Consumer

c)

Decomposer

45.

Organisms that break down wastes and dead organisms and return the raw materials to the environment

a)

Producer

b)

Consumer

c)

Decomposer

46.

A food _______ consists of many overlapping food ________.

a)

web, chains

b)

chain, webs

c)

pyramid, webs

d)

web, pyramids

47.

In the food web above, what organism is missing from this food chain:

Grass --> Slug --> ________ --> Hawk

a)

Vole

b)

Frog

c)

Insect

d)

Thrush

48.

In the energy pyramid, what is the bottom level composed of?

a)

Producers

b)

First-Level Consumers

c)

Second-Level Consumers

d)

Third-Level Consumers

49.

In this food web, the gray fox is a...

a)

Primary Consumer

b)

Secondary Consumer

c)

Both a Primary Consumer and a Secondary Consumer

d)

Producer

50.

Which is an apex predator in this food web?

a)

Hawk

b)

Snake

c)

Frog

d)

Bird

51.

When energy is passed in an ecosystem from one trophic level to the next, only ___ percent of the energy will be passed on.

a)

1

b)

10

c)

100

d)

50

52.

In the food chain pictured, what type of organism is the bird?

a)

producer

b)

primary consumer

c)

secondary consumer

d)

tertiary consumer

53.
What is the role of a producer?
a)
Use sunlight to make food
b)
Gain energy from eating other organisms
c)
Keep other species from overpopulating
d)
Breaking down dead stuff 
54.
Which type of consumer eats meat only?
a)
Producers
b)
Herbivores
c)
Carnivores
d)
Omnivores
55.
Which type of consumer eats meat and plants?
a)
Herbivores
b)
Carnivores
c)
Omnivores
d)
Plants
56.
Why might an organism have more than one arrow coming from them in a food web?
a)
More than one organism may eat them. 
b)
They may eat more than one other organism. 
c)
This organism gets its energy from multiple sources. 
d)
They have no resources available to them.
57.
If the grasshopper were to be removed completely from the food web, what organism would be most effected?
a)
The squirrel
b)
The shrew
c)
The deer
d)
The rabbit
58.

As you work your way up the energy pyramid, what happens to the energy?

a)

It increases

b)

It decreases

c)

It stays the same

d)

Nothing

59.

Deep sea vent bacteria get their energy from

a)

eating other bacteria.

b)

releasing sulfur.

c)

photosynthesis.

d)

chemosynthesis.

60.

If a disease strikes the snake population in the food chain shown, what will be the initial effect on the populations of hawks and rabbits?

a)

The populations of hawks and rabbits will decrease.

b)

The populations of hawks and rabbits will increase.

c)

The population of hawks will increase. The population of rabbits will decrease.

d)

The population of hawks will decrease. The population of rabbits will increase.

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