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AP Biology Respiration & Photosynthesis

Total questions: 75

Worksheet time: 1hrs 10mins

Name
Class
Date
1.
Which process is the largest contributor to the release of CO2 
a)
Citric Acid Cycle or Krebs Cycle
b)
Pyruvate Oxidation
c)
Glycolysis
d)
Oxidative Phosphorylation 
2.
If ADP is phosphorylated then what is this indicating in the reaction? 
a)
ADP is forming into ATP
b)
ADP is becoming AMP
c)
ADP is being used to power other reactions
d)
ADP is being created by the reaction
3.
Which process does not occur in aerobic conditions? 
a)
Fermentation
b)
Pyruvate Oxidation
c)
Citric Acid Cycle or Krebs cycle 
d)
Oxidative Phosphorylation 
4.
What is the main job of the electron carriers in cellular respiration? 
a)
Transport electrons and hydrogen atoms to the electron transport chain 
b)
Capture energy throughout the process of cellular respiration
c)
Provide the reactants for the process of cellular respiration
d)
Pump positive hydrogen ions and shuttle electrons across the electron transport chain and contribute to chemiosmosis
5.

Plants use the following reactants for the light dependent reactions

a)

Water and CO2

b)

Water and NADPH

c)

Water and NADP+

d)

NADPH and ATP

6.

Photosynthesis goal is to

a)

convert light energy into glucose energy

b)

use light energy to make oxygen gas

c)

convert sugar energy into ATP

d)

convert sugar energy into oxygen gas

7.

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 the Calvin cycle

d)

reduction of the carbon chain during the Calvin cycle

8.

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

9.

The NADP+ is

a)

oxidized during the light reaction

b)

reduced during the light reaction

c)

oxidized during the Calvin cycle

d)

reduced during the Calvin cycle

10.

What is FALSE about the Calvin cycle

a)

uses the light reactions products

b)

produces a three carbon sugar (G3P)

c)

produces carbon dioxide

d)

produces NADP+

11.
Where does glycolysis occur?
a)
Inner mitochondrial membrane
b)
Mitochondrial Matrix
c)
Cytosol
d)
At a ribosome
12.
Glycolysis is a _______ process
a)
Anabolic
b)
Catabolic
c)
Single Step
d)
Strictly Eukaryotic
13.
NADH is a ______ form of NAD+.
a)
Reduced
b)
Oxidized
c)
Catabolized
d)
Hydrolized
14.
How many ATP are gained through glycolysis?
a)
0
b)
2
c)
4
d)
30-38
15.
ATP hydrolysis is _________.
a)
Exergonic
b)
Endergonic
c)
Anabolic
d)
A condensation reaction
16.
Cellular respiration involves the net _______ of glucose.
a)
Reduction
b)
Oxidation
c)
ATP
d)
REDOX
17.
In this photo, what do the explosions represent?
a)
Glucose
b)
ATP
c)
Pyruvate
d)
Cleavage
18.

Which molecule enters Krebs Cycle?

a)

Pyruvate

b)

Glucose

c)

Acetyl CoA

d)

reducing powers

19.
What enzyme in the ETC is responsible for generating the ATP molecules?
a)
ATPase
b)
ATP synthase
c)
Hexokinase
d)
none of the above
20.
Where does ETC occur?
a)
Mitochondrial matrix
b)
Outer mitochondrial membrane
c)
Inner mitochondrial membrane
d)
Cytosol
21.
the loss of hydrogen or electrons is known as 
a)
dehydration
b)
hydrogenation
c)
reduction
d)
oxidation
22.
site of ATP synthase
a)
1
b)
2
c)
3
d)
4
23.

site of the Krebs cycle

a)

1

b)

2

c)

3

d)

4

24.
Which gas is a product released during photosynthesis that humans need for survival?
a)
Carbon dioxide
b)
neon
c)
nitrogen
d)
oxygen
25.
Which organism pictured must absorb carbon dioxide to survive?
a)
bird
b)
rabbit
c)
insect
d)
tree
26.
Which process takes place in the presence of oxygen and produces nearly 20 times as much as ATP as glycolysis alone?
a)
photosynthesis
b)
lactic acid fermentation
c)
aerobic respiration
d)
alcoholic fermentation
27.

Two different species of bacteria are examined. Scientists find that species X always produces CO2 and H2O during cellular respiration. Species Y always produces ethyl alcohol and CO2. Which conclusion can be made from these observations?

a)

Only species Y is aerobic.

b)

Only species Y is anaerobic

c)

Both species X and Y are aerobic.

d)

Both species X and Y are anaerobic.

28.

A weightlifter is using heavy weights in short bursts for a competition. Because his muscle cells are not able to take in enough oxygen to make very much ATP the weightlifter begins to get fatigue in his muscles. Which of the following processes is most likely going on in the muscles of the weightlifter as he competes in his event?

a)

As the cells run out of oxygen they switch to anaerobic respiration (fermentation), which allows the cell to make small amounts of ATP in the absence of oxygen.

b)

As the cells run out of oxygen, they die off gradually and the weightlifter's muscles have fewer contracting muscle cells.

c)

The cells will never run out of oxygen if the weightlifter is breathing.

d)

As the cells run out of oxygen, they will continue to make the same amount of ATP, since oxygen is not required to make ATP.

29.
What function does ATP carry out in living things?
a)
aids in protein folding and coiling
b)
used to capture and transfer energy
c)
identifies DNA start sequences for transcription
d)
helps maintain the fluidity of cell membranes
30.
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
31.
The main source of energy for all life comes from ____.
a)
the Earth
b)
the moon
c)
the sun
d)
the food we eat/make
32.
Which gas is removed from the atmosphere during photosynthesis?
a)
hydrogen
b)
oxygen
c)
nitrogen
d)
carbon dioxide
33.
What gas is released by plants during photosynthesis?
a)
sulfur
b)
carbon dioxide
c)
oxygen
d)
hydrogen
34.
How can photosynthesis be related to cellular respiration?
a)
What's produced (made) by one is needed (the reactants) for the other
b)
They both produce the same products
c)
They both have the same reactants (need the same things)
d)
These 2 processes have nothing in common
35.
Which plant structure is extremely necessary for photosynthesis to take place?
a)
leaves
b)
flower petals
c)
anthers
d)
pistils
36.

Where does carbon dioxide enter plants?

a)

The leaves

b)

Stomata

c)

Roots

d)

Stem

37.
In which organelle (part of the cell) does photosynthesis take place?
a)
mitochondria
b)
chloroplast
c)
nucleus
d)
cell membrane
38.
Most plants appear green because chlorophyll
a)
absorbs green light.
b)
absorbs violet light.
c)
does not absorb green light.
d)
does not absorb violet light.
39.
Where does the Calvin cycle take place?
a)
stroma of the chloroplast
b)
thylakoid membrane
c)
outer membrane of the chloroplast
d)
interior of the thylakoid membrane
40.
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
a)
CO2 and glucose
b)
H2O and O2
c)
electrons and H+
d)
ATP and NADPH
41.
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 II and I
42.
Which of the following events occurs in the light reactions of photosynthesis?
a)
NADP+ is produced
b)
ATP is consumed to yield ADP
c)
carbon dioxide is fixed in organic molecules
d)
light is absorbed and funneled to reaction-center chlorophyll a
43.
Which of the following statements about the relationship between photosynthesis and cellular respiration is true?
a)
In cellular respiration the biochemical pathways of photosynthesis run in reverse.
b)
In photosynthesis the biochemical pathways of cellular respiration run in reverse.
c)
Cellular respiration occurs only in animals and photosynthesis occurs only in plants.
d)
Cellular respiration is catabolic and photosynthesis is anabolic.
44.
What is the primary function of cyclic electron flow?
a)
to produce additional NADPH
b)
to produce additional ATP
c)
to produce additional oxygen
d)
to produce additional carbon dioxide
45.
Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
a)
The light reactions provide ATP and NADPH to the Calvin cycle, and the Calvin cycle returns ADP, ℗i, and NADP+ to the light reactions.
b)
The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the Calvin cycle provides water and electrons to the light reactions.
c)
The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP.
d)
The light reactions provide the Calvin cycle with oxygen for carbon fixation, and the Calvin cycle provides the light reactions with sugars to produce ATP.
46.
Where do the light-dependent reactions occur? 
a)
thylakoid membrane
b)
stroma
c)
mesophyll
d)
mitochondria
47.
Which of the following is NOT a product of the light reactions?
a)
ATP
b)
NADPH
c)
Oxygen
d)
Glucose
48.
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
49.
What does ATP synthase do?
a)
Create ATP in chemiosmosis.
b)
Break down ATP in chemiosmosis.
c)
Break down NADPH. 
d)
Create NADPH.
50.
What is the function of NADP+?
a)
It absorbs light
b)
It is an electron carrier
c)
It is a light-reflecting pigment
d)
It acts as long-term energy storage
51.
Which substance from the light-dependent reactions of photosynthesis is a source of energy for the light-independent reactions?
a)
ADP
b)
H2O
c)
NADPH
d)
pyruvic acid
52.
If an aquatic plant is placed into a test tube with water near a light source, what will it produce?
a)
Glucose and Oxygen
b)
Carbon dioxide and ATP
c)
Water and Oxygen
d)
Glucose and ATP
53.
Beyond Basics:  The splitting/breaking of water 
a)
occurs during Cellular Respiration
b)
is called hydrolysis
c)
produces oxygen, electrons and hydrogens
d)
occurs during fermentation
54.
Beyond Basics:  Carbon fixation
a)
is part of the Krebs Cycle
b)
is part of the Calvin Cycle
c)
is part of the ETC
d)
is part of the Light Reactions
55.
Beyond Basics:  Electrons become energized during photosynthesis when 
a)
they are absorbed by water
b)
they undergo carbon fixation
c)
they are struck with light energy
d)
they are incorporated into oxygen
56.
Green plants reflect ________ light.
a)
Red
b)
Green
c)
All
d)
Red and Violet
57.
__________ is a stack of thylakoids
a)
Granum
b)
Stomata
c)
Stroma
d)
Chloroplast
58.

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

a)

Chloroplast / thylakoid membrane

b)

stroma / thylakoid

c)

mesophyl / stomata

d)

thylakoid membrane / stroma

59.
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
60.
Where is glucose synthesized
a)
Photosystem II
b)
Photosystem I
c)
Calvin Cycle
d)
Glycolysis
61.

Since plants are building a carbohydrate in the Calvin Cycle, is the process endergonic or exergonic and why?

a)

Endergonic because carbohydrate production is catabolic

b)

Exergonic because carbohydrate production is anabolic

c)

Endergonic because carbohydrate production is anabolic.

d)

Exergonic because carbohydrate production is catabolic

62.
Energy is released from ATP when
a)
a phosphate group is added.
b)
adenine bonds to ribose.
c)
ATP is exposed to sunlight.
d)
a phosphate group is removed.
63.
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
64.

The enzyme responsible for Carbon Fixation in photosynthesis is

a)

RuBisCo

b)

PEP Carboxylase

c)

Hexokinase

d)

Pyruvate DeHydrogenase

65.
The molecule that comes out of the Calvin Cycle to produce glucose, and polymers like cellulose is:
a)
RuBP
b)
GP3
c)
3-PG
d)
G3P
66.
Which of the following molecules is not needed for the Calvin Cycle?
a)
CO2
b)
ATP
c)
NADPH
d)
H2O
67.

What supplies additional electrons to the electron transport chain of the light reactions?

a)

the electrons from PS II

b)

water

c)

glucose

d)

oxygen

68.

Which stage of respiration has been evolutionarily conserved across all domains of life (bacteria, archaea, and eukaryotes)?

a)

Krebs cycle (CItric acid cycle)

b)

Oxidative phosphorylation

c)

Glycolysis

d)

Fermentation

69.

Chemiosmosis is associated with which two metabolic processes?

a)

light reactions

b)

oxidative phosphorylation

c)

Krebs cycle

d)

Calvin cycle

e)

glycolysis

70.

What is the primary purpose of the Calvin cycle?

a)

Produce ATP and NADPH

b)

Fix CO2 into usable carbohydrates

c)

Remove carbons from sugars one at a time

71.

The addition of a phosphate group to a molecule is called

a)

reduction.

b)

chemiosmosis.

c)

oxidation.

d)

phosphorylation.

72.

Electron transport chains are important in both photosynthesis and respiration because

a)

they allow protons to flow down their concentration gradient.

b)

they establish an electron gradient that allows for conduction of signals.

c)

they pump protons against their gradient, and the gradient is later used to produce ATP.

d)

they split water molecules in order to produce oxygen.

73.

What is the purpose of fermentation?

a)

To break down glucose into two pyruvate molecules

b)

To produce ATP

c)

To convert glucose directly into CO2

d)

To replenish NAD+ for glycolysis

74.

In the leaf disk experiment, why did you dissolve baking soda in the water?

a)

to increase the oxygen in the water

b)

to change the pH of the water.

c)

to decrease the carbon dioxide in the water

d)

to increase the carbon dioxide in the water

75.

In the leaf disk experiment, which gas was trapped inside the leaf tissues?

a)

oxygen

b)

carbon dioxide

c)

nitrogen

d)

carbon monoxide

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