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APBio - Unit 3 - 1st semester

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

What is the main product of photosynthesis?

a)

ATP

b)

Glucose

c)

Oxygen

d)

Carbon dioxide

2.

What is the relationship between photosynthesis and cellular respiration?

a)

They are unrelated processes

b)

Photosynthesis produces oxygen used in cellular respiration

c)

Cellular respiration produces glucose used in photosynthesis

d)

Both processes occur in the mitochondria

3.

During the day, what processes occur in plants?

a)

Only cellular respiration

b)

Only photosynthesis

c)

Both cellular respiration and photosynthesis

d)

Only light-independent reactions

4.

What happens during the night in plants?

a)

Only photosynthesis

b)

Only cellular respiration

c)

Cellular respiration and light-independent reactions of photosynthesis

d)

Only light-dependent reactions

5.

What is the chemical formula for glucose?

a)

C6H12O6

b)

H2O

c)

CO2

d)

O2

6.

Which process is quantitatively and fundamentally more important to life on Earth?

a)

Photosynthesis

b)

Chemosynthesis

c)

Fermentation

d)

Respiration

7.

What is the original source of energy in a typical food chain?

a)

The sun

b)

Chemical reactions

c)

Water

d)

Soil nutrients

8.

What happens to energy during each energy transfer in cells?

a)

It is completely lost

b)

It dissipates as heat

c)

It is stored as fat

d)

It is converted to light

9.

What is the main product of photosynthesis?

a)

Oxygen

b)

Carbon dioxide

c)

Glucose

d)

Water

10.

What is the role of enzymes in the chloroplasts?

a)

They store energy

b)

They act as pigments

c)

They facilitate chemical reactions

d)

They transport water

11.

Which process occurs in the stroma?

a)

Light reactions

b)

Calvin cycle

c)

Glycolysis

d)

Fermentation

12.

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin Cycle?

a)

CO2 and glucose

b)

ATP and NADPH

c)

ADP, P and NADP+

d)

H2O and O2

13.

When oxygen is released as a result of photosynthesis, it is a direct by-product of ____

a)

reducing NADP+

b)

splitting water molecules

c)

chemiosmosis

d)

electron transfer in photosystem 1

14.
Which of the following processes is most directly driven by light energy?
a)
carbon fixation in stroma
b)
reduction of NADP molecules
c)
ATP Synthesis
d)
removal of electrons from membrane-bound chlorophyll molecules
15.
What is the primary function of the light reactions of photosynthesis?
a)
To produce glucose
b)
To produce NADPH and ATP
c)
To use ATP
d)
To produce RuBP
16.
What supplies the electrons that are lost in PS I?
a)
the electrons from PS II
b)
water
c)
glucose
d)
oxygen
17.

The light reactions occur in the ________ and the dark reactions take place in the ________.

a)

Chloroplast / thylakoid membrane

b)

stroma / thylakoid

c)

mesophyll / stomata

d)

thylakoid membrane / stroma

18.
Where does the carbon come from that is used to form glucose?
a)
The soil
b)
CO2 in the air
c)
From other carbohydrates
d)
Calvin Cycle
19.

What is the primary function of the Calvin cycle?

a)

Regenerate ATP for use in the light reactions of photosynthesis

b)

Produce carbon dioxide for use in the light reactions of photosynthesis

c)

Produce oxygen by oxidizing water

d)

Produce simple sugars from carbon dioxide

20.

The H+ concentration gradient is formed to

a)

make NADPH

b)

split a water molecule

c)

generate ATP

d)

form water

21.

Rubisco is important in which step of photosynthesis?

a)

energizing the electrons in chlorophyll

b)

carbon fixation when CO2 is connected to RuBP during Calvin cycle

c)

regeneration phase as RuBP is made during Calvin cycle

d)

reduction of the carbon chain during the Calvin cycle

22.

If the proton (H+) pump in the thylakoid was not working, which molecule could not be made during the light reaction?

a)

NADPH

b)

ATP

c)

Water

d)

Oxygen gas

23.

An _____ can make its own food, while a _____ cannot make its own food.

a)

Autotroph, Heterotroph 

b)

Heterotroph, Autotroph

c)

Chlorophyll, Chloroplast 

24.
Where is the most easily accessible energy stored in an ATP molecule?
a)
between the 1st and 2nd phosphate groups
b)
between the adenine and ribose groups
c)
between the 2nd and 3rd phosphate groups
d)
between the ribose and the 1st phosphate groups
25.
The process of using electrons to pump H+ to create an electrochemical gradient that must flow through a protein is called:
a)
Chemiosmosis
b)
Fantasia
c)
Induced Fit
d)
Electrolysis
26.

_________________ are the products of the light-dependent reactions.

a)

chloroplast and light

b)

water and sugars

c)

ATP, NADPH and OXYGEN

27.

The electrons travel through the ___________, a series of electron carrier proteins.

a)

stroma

b)

electron transport chain

c)

chloroplasts

28.

ATP Synthase is a membrane protein, through which excess __________ escape the thylakoid in a process that makes ATP.

a)

water ions

b)

NADPH ions

c)

Hydrogen ions

29.

A substance that loses an electron has been...

a)

reduced

b)

oxidized

c)

negatived

d)

positived

30.

Which of the following are products of the light reaction that are required for the Calvin Cycle?

a)

H2O & CO2

b)

O2 & ATP

c)

ATP & NADPH

d)

ADP & Pi

31.

In the Calvin Cycle, ATP provides energy. What does NADPH provide?

a)

It provides protons

b)

It provides hydrogen

c)

It provides energy

d)

It provides electrons

32.

NADH is a ______ form of NAD+.

a)

Reduced

b)

Oxidized

c)

Catabolized

d)

Hydrolyzed

33.
Where does glycolysis occur?
a)
Inner mitochondrial membrane
b)
Mitochondrial Matrix
c)
Cytosol
d)
At a ribosome
34.
What enzyme in the ETC is responsible for generating the ATP molecules?
a)
ATPase
b)
ATP synthase
c)
Hexokinase
d)
none of the above
35.
Where does ETC occur?
a)
Mitochondrial matrix
b)
Outer mitochondrial membrane
c)
Inner mitochondrial membrane
d)
Cytosol
36.
What enzyme in the ETC is responsible for generating the ATP molecules?
a)
ATPase
b)
ATP synthase
c)
Hexokinase
d)
none of the above
37.
Where does ETC occur?
a)
Mitochondrial matrix
b)
Outer mitochondrial membrane
c)
Inner mitochondrial membrane
d)
Cytosol
38.

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

39.
What are the reactants in the equation for cellular respiration?
a)
oxygen and lactic acid
b)
carbon dioxide and water
c)
glucose and oxygen
d)
water and glucose
40.
What determines the fate of pyruvate?
a)
carbon dioxide
b)
oxygen
c)
ATP
d)
water
41.

The ATPs of glycolysis are produced through

a)

chemiosmosis

b)

substrate-level phosphorylation

42.

What is the main purpose of the Krebs cycle?

a)

to produce ATP

b)

to produce electron donors

c)

to produce water

d)

to produce carbon dioxide

43.
The final electron acceptor of aerobic respiration is
a)
oxygen
b)
water
c)
carbon dioxide
d)
NAD+
44.

Which molecules are made during the Krebs Cycle to power the electron transport chain?

a)

ATP and CO2

b)

ATP and NADH

c)

NADH and FADH2

d)

ADP, NAD+ and FAD+

45.

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin Cycle?

a)

CO2 and glucose

b)

ATP and NADPH

c)

ADP, P and NADP+

d)

H2O and O2

46.

When oxygen is released as a result of photosynthesis, it is a direct by-product of ____

a)

reducing NADP+

b)

splitting water molecules

c)

chemiosmosis

d)

electron transfer in photosystem 1

47.
The color of light least effective in driving photosynthesis is _________
a)
blue
b)
red
c)
orange
d)
green
48.

In the Calvin Cycle, ATP provides energy. What does NADPH provide?

a)

It provides protons

b)

It provides hydrogen

c)

It provides energy

d)

It provides electrons

49.

Which reactions in photosynthesis produce glucose?

a)

The Calvin cycle reactions

b)

The light reactions

c)

Glycolysis

d)

ATP hydrolysis

50.
Where does glycolysis occur?
a)
Inner mitochondrial membrane
b)
Mitochondrial Matrix
c)
Cytosol
d)
At a ribosome
51.

How many ATP are gained (net) through glycolysis?

a)

0

b)

2

c)

4

d)

30-38

52.
Where do the light-dependent reactions occur? 
a)
thylakoid membrane
b)
stroma
c)
mesophyll
d)
mitochondria
53.
The enzyme responsible for Carbon Fixation in C3 Photosynthesis is
a)
RuBisCo
b)
PEP Carboxylase
c)
Hexokinase
d)
Pyruvate DeHydrogenase
54.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
55.
Where does the carbon come from that is used to form glucose?
a)
The soil
b)
CO2 in the air
c)
From other carbohydrates
d)
Calvin Cycle
56.
Where does carbon dioxide enter plants
a)
The leaves
b)
Stomata
c)
Roots
d)
Stem
57.

What are the products of glycolysis?

a)

2 ATP, 2 NADPH, 2 pyruvate

b)

2 ADP, 2 NADH, 2 pyruvate

c)

2 ATP, 2 NADH, 2 pyruvate

d)

2 ADP, 2 NADPH, 2 pyruvate

58.

Glycolysis DOES NOT need ATP to occur.

a)

True

b)

False

59.

Which of these is a reactant of glycolysis?

a)

pyruvic acid

b)

oxygen

c)

glucose

60.

Glycolysis requires oxygen

a)

True

b)

False

61.

Where does the pyruvic acid produced by glycolysis go next?

a)

the Calvin Cycle

b)

the electron transport chain

c)

the Krebs Cycle

d)

back through the glycolysis process

62.

During glycolysis, glucose is broken down into how many molecules of pyruvate?

a)

2

b)

3

c)

4

d)

1

63.

Which reaction adds a molecule of phosphate?

a)

Oxidation

b)

Phosphorylation

c)

Dephosphorylation

d)

Reduction

64.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

65.

Oxidation is the _________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

66.

How many ATP molecules are invested to start glycolysis?

a)

2

b)

4

c)

6

d)

1

67.

What is the significance of the investment phase in glycolysis?

a)

It generates ATP and NADH

b)

It consumes ATP to activate glucose for subsequent reactions

c)

It produces pyruvate as the end product

d)

It involves the conversion of glucose to fructose-6-phosphate

68.

What is the role of NAD+ in glycolysis?

a)

It is reduced to NADH, which is used in the electron transport chain

b)

It is oxidized to NADH, which is used in the Krebs cycle

c)

It is reduced to NADH, which is used in the conversion of pyruvate to lactate

d)

It is oxidized to NADH, which is used in the conversion of glucose to glucose-6-phosphate

69.

What is the net gain of ATP molecules in glycolysis?

a)

4

b)

2

c)

0

d)

6

70.

The point of the Krebs Cycle is to...

a)

Produce high amounts of ATP using a proton gradient

b)

Move high energy electrons through series of proteins to eventually bind with O2, creating water and protons

c)

Break down pyruvate to produce electron carrier molecules, FADH2 and NADH, as well as CO2 and ATP as byproducts

d)

Use ATP and NADPH to produce 6 carbon sugars

71.

What effect does adding an enzyme to a reaction cause?

a)

increasing the time it takes for the reaction to occur

b)

increases the activation energy

c)

decreases the activation energy

d)

increasing the amount of energy necessary for the reaction

72.

Which of the following colors would most likely be used for energy during photosynthesis?

a)

green

b)

red

c)

yellow

d)

all colors are absorbed equally

73.

Where do the light dependent reactions occur?

a)

stroma

b)

matrix

c)

inner membrane of the mitochondria

d)

thylakoid membrane

74.
Enzymes are usually....
a)
Proteins
b)
Lipids
c)
Carbohydrates
d)
None of the Above
75.
Use the diagram to answer the question. Between which parts of the molecule must the bonds be broken to form an ADP molecule?
a)
A and B
b)
A and C
c)
B and C
d)
C and D
76.

What are the reactants for photosynthesis?

a)

carbon dioxide and oxygen

b)

oxygen and glucose

c)

carbon dioxide and water

d)

ATP and carbon dioxide

77.

Oxygen that is a byproduct of photosynthesis comes from ___________

a)

Glucose

b)

Carbon Dioxide

c)

Water

d)

NADPH

78.

What are the electron carriers in cellular respiration?

a)

NADPH

b)

ATP and pyruvate

c)

NADH, FADH2

d)

ATP synthase

79.

Which step of photosynthesis stores solar energy as ATP?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

80.

Which step of photosynthesis stores high energy electrons as NADPH?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

81.

Which step of photosynthesis synthesizes G3P?

a)

Calvin Cycle

b)

Glycolysis

c)

Krebs Cycle

d)

Light Reactions

82.

Glycolysis ___________ .

a)

stops when oxygen is not available

b)

happens in the cytoplasm

c)

happens in the mitochondrial matrix

d)

uses the inner membrane of mitochondria

83.

The Calvin Cycle requires each of the following inputs EXCEPT

a)

ATP

b)

NADPH

c)

FADH2FADH_2  

d)

CO2CO_2  

84.

Which of the following processes produces the most ATP

a)

Glycolysis

b)

Oxidative Phosphorylation

c)

Fermentation

d)

Krebs Cycle

85.

Oxidative phosphorylation is also known as _____.

a)

Krebs Cycle

b)

Glycolysis

c)

Fermentation

d)

Electron Transport Chain

86.

What is the role of chlorophyll in photosynthesis?

a)

To absorb light energy

b)

To produce glucose

c)

To release oxygen

d)

To convert water into hydrogen

87.

Which molecule acts as the final electron acceptor in the electron transport chain during cellular respiration?

a)

NADP+

b)

Oxygen

c)

Carbon dioxide

d)

Glucose

88.

In which part of the chloroplast does the Calvin Cycle take place?

a)

Thylakoid membrane

b)

Stroma

c)

Granum

d)

Outer membrane

89.

What is the main purpose of cellular respiration?

a)

To produce glucose

b)

To generate ATP

c)

To create oxygen

d)

To store energy as fat

90.

Which molecule is the primary electron carrier in cellular respiration?

a)

NADH

b)

FADH2

c)

ATP

d)

CO2

91.

In which part of the cell does the Krebs cycle occur?

a)

Cytosol

b)

Inner mitochondrial membrane

c)

Mitochondrial matrix

d)

Nucleus

92.

Which molecule is the final electron acceptor in the electron transport chain during cellular respiration?

a)

Oxygen

b)

Carbon dioxide

c)

Water

d)

ATP

93.

What is the primary pigment involved in photosynthesis?

a)

Chlorophyll

b)

Carotene

c)

Xanthophyll

d)

Anthocyanin

94.

In which part of the chloroplast does the Calvin cycle take place?

a)

Thylakoid membrane

b)

Stroma

c)

Grana

d)

Outer membrane

95.

Which pigment is primarily responsible for absorbing light during photosynthesis?

a)

Chlorophyll a

b)

Chlorophyll b

c)

Carotenoids

d)

Xanthophylls

96.

What is the primary function of the Calvin Cycle?

a)

To produce ATP

b)

To fix carbon dioxide into glucose

c)

To release oxygen

d)

To absorb sunlight

97.

What is the primary function of the light-dependent reactions in photosynthesis?

a)

To produce glucose

b)

To generate ATP and NADPH

c)

To release carbon dioxide

d)

To absorb oxygen

98.

Which process occurs in the cytosol of a cell?

a)

Krebs Cycle

b)

Glycolysis

c)

Electron Transport Chain

d)

Calvin Cycle

99.

What is the role of water in the light reactions of photosynthesis?

a)

It provides electrons

b)

It absorbs light energy

c)

It releases oxygen

d)

It forms glucose

100.

Which process occurs in the thylakoid membrane?

a)

Calvin cycle

b)

Glycolysis

c)

Light-dependent reactions

d)

Krebs cycle

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