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Review Questions

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.
The energy needed to start a chemical reaction
a)
Catalyst
b)
Activation Energy
c)
Substrates
d)
Reactants
2.
Look at this reaction graph. Which of the following is NOT true of this reaction?
a)
The reactants have lower energy than the product
b)
This is showing an endothermic reaction
c)
Activation energy was not needed for this to occur
d)
The product has more energy than the reactants
3.

Which of the following statements is TRUE of enzymes?.

a)

Enzymes are not found in living organisms

b)

Enzymes help to speed up chemical reactions

c)

Enzymes are made carbohydrates

d)

Enzymes increase the activation energy of a chemical reaction

4.
In this diagram A is the
a)
substrate
b)
enzyme
c)
enzyme-substrate complex
d)
product
5.

Enzymes are also considered to be biological ____________

a)

catalysts

b)

organisms

c)

life

d)

denatures

6.
The substance(s) that enter an enzyme and are either joined or broken apart
a)
Reactants
b)
Products
c)
Substrates
d)
Denatures
7.
The area of an enzyme where the substrate binds to the enzyme
a)
Product
b)
Active Site
c)
Catalyst
d)
Complex
8.
Which molecules in this reaction are the products?
a)

CH4 and O2

b)
H2O and O2
c)
CO2 and H20
d)
CH4 and H20
9.
Which molecules in this reaction are the reactants?
a)

CH4 and O2

b)
H2O and O2
c)
CO2 and H20
d)
CH4 and H20
10.

What term is used to describe the process of an enzyme changing shape due to extreme heat or pH levels?

a)
depolarize
b)

catalyze

c)
polymerize
d)
denature
11.
A reaction in which energy is absorbed is called
a)
endothermic
b)
exothermic
c)
introverted
d)
exceptionally thermic
12.
A reaction where energy is RELEASED to the environment
a)
Exothermic
b)
Endothermic
c)
Polythermic
d)

Thermal Energy

13.
Which of the following is true of the below reaction?
a)
There is one reactant and two products involved
b)
This is an exothermic reaction
c)
This is comparing the reaction rate with an enzyme vs without an enzyme
d)
Energy is absorbed by this reaction
14.

In the picture below, C and D represent the __________.

a)

reactants

b)

products

c)

catalysts

d)

inhibitors

15.

Pepsin, a common enzyme found in the stomach, is most active at pH values between 0.5 and 2.5. It works slowly between pH values of 2.6 and 3.4. Beyond a pH of about 3.5, it becomes completely inactive. Why does this happen?

a)

The enzyme is denatured, changing its active site needed for binding to specific substrates.

b)

The enzyme is enhanced, increasing its active site for binding to specific substrates.

c)

The enzyme is stabilized, maintaining its active site for binding to specific substrates.

d)

The enzyme is replicated, doubling its active site for binding to specific substrates.

16.

In this picture, which letter represents the enzyme?

a)

A

b)

B

c)

C

d)

D

17.
Chemical reactions always involve
a)
the breaking of bonds in reactants.
b)
the formation of new bonds in products.
c)
the breaking of bonds in reactants and the formation of new bonds in products.
d)
enzymes. 
18.
An enzyme speeds up a reaction by
a)
lowering the activation energy.
b)
raising the activation energy.
c)
releasing energy.
d)
absorbing energy.
19.

What is the final step in the enzyme-substrate interaction?

a)

Products leaving the active site of the enzyme.

b)

Substrate entering the active site of the enzyme.

c)

Enzyme changing shape.

d)

Enzyme releasing energy.

20.

What is the effect of a pH level that is too low or too high on an enzyme?

a)

The enzyme becomes more active.

b)

The enzyme denatures and no longer works.

c)

The enzyme changes its substrate.

d)

The enzyme's activity remains unchanged.

21.

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

22.

What are reactants of cell respiration?

a)

Glucose and Oxygen

b)

Glucose and Carbon Dioxide

c)

Carbon Dioxide and water

d)

ATP and Water

23.

Which organelle does cellular respiration occur in?

a)

Nucleus

b)

Mitochondria

c)

Chloroplast

d)

Cytoplasm

24.

What is the main goal of cell respiration?

a)

to break down glucose in the form of ATP

b)

to make ATP that we use for energy

c)

to create CO2 for plants

d)

Respiration is a byproduct of photosynthesis

25.
Lactic acid fermentation occurs in your muscles after a workout because your cells are struggling to get...
a)
Glucose
b)
Sunlight
c)
Oxygen
d)
Water
26.
The first step in the break down of glucose is
a)
light reactions
b)
glycolysis
c)
Kreb's cycle
d)
Calvin Cycle
27.
After strenuous exercise, a muscle cell would contain decreased amounts of ______ and increased amounts of ______ ____
a)
glucose, ATP
b)
ATP, glucose
c)
oxygen, lactic acid
d)
lactic acid, ATP
28.
Is ADP or ATP more like a fully charged battery, and why?
a)
ADP, because it has three phosphate groups; breaking and reforming the bonds among them releases energy.
b)
ATP, because it has three phosphate groups; breaking and reforming the bonds among them releases energy.
c)
ADP, because it has two phosphate groups; breaking and reforming the bonds among them releases energy.
d)
ATP, because it has two phosphate groups; breaking and reforming the bonds among them releases energy.
29.
Using the figure, which parts of the molecule must the bonds be broken to form an ADP molecule?
a)
A and B
b)
B and C
c)
C and D
d)
all of the above
30.
What is the correct equation for cellular respiration?
a)
6O2 + C6H12O6 -> 6CO2 + 6H2O + Energy
b)
6O2 + C6H12O6 + Energy -> 6CO2 + 6H2O
c)
6CO2 + 6H2O -> 6O2 + C6H12O6 + Energy
d)
6CO2 + 6H2O + Energy -> 6O2 + C6H12O6
31.

A common cycle in biology is represented above.


The ATP molecule above is commonly used to

a)

diffuse water across a membrane

b)

actively transport molecules in an organism

c)

move molecules from a high to a low concentration

d)

balance the nutrients in an ecosystem

32.
Yogurt, bread, pickles, cheese, sour cream are foods that are all produced through ________.
a)
glucose
b)
carbon dioxide
c)
oxygen
d)
fermentation
33.

Organisms that must consume nutrients

a)

Autotroph

b)

Chloroplasts

c)

Heterotroph

d)

ATP

34.

What type of organism makes it's own food?

a)

Autotroph

b)

Heterotroph

c)

Consumer

d)

Omnivore

35.

What is the chemical equation for photosynthesis?

a)

6CO2+6H2O+light→C6H12O6+6O26CO_2 + 6H_2O + light \rightarrow C_6H_{12}O_6 + 6O_2

b)

C6H12O6+6O2→6CO2+6H2O+ATPC_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + ATP

c)

6O2+6H2O→C6H12O6+6CO26O_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6CO_2

d)

C6H12O6+ATP→6CO2+6H2OC_6H_{12}O_6 + ATP \rightarrow 6CO_2 + 6H_2O

36.

Which of the following statements is true about plant cells?

a)

They only have mitochondria.

b)

They only have chloroplasts.

c)

They have both chloroplasts and mitochondria.

d)

They have neither chloroplasts nor mitochondria.

37.

What are the reactants in the process of cellular respiration?

a)

Glucose and Oxygen

b)

Carbon Dioxide and Water

c)

ATP and Oxygen

d)

Glucose and Water

38.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
39.

How does ATP provide energy for the cell?

a)

The bond between the first and second phosphate is broken to release energy.

b)

The bond between the adenine and the sugar is broken to release energy.

c)

The bond between the sugar and phosphates are broken and release energy.

d)

The bond between the second and third phosphate are broken to release energy.

40.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
41.
The diagram below shows the relationship between photosynthesis and cellular respiration and the organelles in which they occur.Which statement describes how photosynthesis and cellular respiration are interrelated?
a)
 Oxygen is produced during cellular respiration and stored during photosynthesis.
b)
Carbon dioxide and water released by cellular respiration are used in photosynthesis.
c)
Photosynthesis releases the energy that is stored during the process of cellular respiration.
d)
 Glucose is used during cellular respiration to produce food that is broken down during photosynthesis.
42.
Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis? 
a)
The light-dependent stage
b)
The light-independent stage 
c)
The electron transport chain
d)
ATP formation
43.

Where is the site of photosynthesis

a)

chlorophyll

b)

chloroplast

c)

chromosome

d)

chlorine

44.

What type of respiration requires oxygen?

a)

Aerobic

b)

Anaerobic

45.

Which organism go through cellular respiration?

a)

animals

b)

plants

c)

both animals and plants

d)

none

46.

Which of the following is the correct equation for PHOTOSYNTHESIS?

a)

light + carbon dioxide + water --> glucose + oxygen

b)

carbon dioxide + sugar + water --> oxygen + light

c)

oxygen + light + water --> carbon dioxide + sugar

d)

carbon dioxide + oxygen + water --> Light+ Sugar

47.
What three things are needed for a plant to do photosynthesis?
a)
Glucose, Oxygen, Sunlight
b)
CO2, Oxygen, Sunlight
c)
CO2, Water, Sunlight
d)
Oxygen, Water, Sunlight
48.
What does a plant release into the air?
a)
Plants release carbon dioxide into the air.
b)
Plants release sugar into the air.
c)
Plants release oxygen into the air.
d)
Plants release bacon into the air.
49.

What is the overall effect that plants have on the environment when it comes to the concentration levels of CO2 and O2?

a)

CO2 increases and O2 decreases

b)

O2 increases and CO2 remains constant

c)

CO2 increases and O2 remains constant

d)

O2 increases and CO2 decreases

50.

If carbon dioxide is removed from a plant's environment, what would you expect to happen to its production of sugar (glucose)?

a)

More sugars would be produced

b)

No sugars would be produced

c)

The same number of sugars would be produced, but without carbon dioxide

d)

Carbon dioxide does not affect the production of sugars in plants

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