Question 1

What organisms are capable of photosynthesis?

Accepted Answer

A) plants only 
B) plants and algae only 
C) plants and some bacteria only 
D) plants,algae,and some bacteria 
A) plants only 
B) plants and algae only 
C) plants and some bacteria only 
D) plants,algae,and some bacteria D

Question 2

G3P (glyceraldehyde 3 phosphate)is used by plants for all of the following EXCEPT the formation of

Accepted Answer

A) fatty acids. 
B) amino acids. 
C) oxygen. 
D) sucrose. 
A) fatty acids. 
B) amino acids. 
C) oxygen. 
D) sucrose. C

Question 3

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Accepted Answer

A) True 
 B)False  False

Question 4

The action spectrum of photosynthesis shows a high light absorption for violet/blue and orange/red and a low absorption for green/yellow.If we were to set up an experiment where narrow bands of unicolored light were shown on an aquatic plant such as Elodea,and we counted the number of bubbles of oxygen produced as an indicator of photosynthetic rate,how would the graph appear?

Accepted Answer

A) just like the action spectrum with peaks at violet/blue and orange/red and a trough at yellow/green 
B) exactly inverted from the action spectrum with a peak for yellow/green 
C) perfectly flat because many wavelengths are used by chlorophyll 
D) a descending line because ultra-violet has more energy than infra-red 
E) There is no way to guess without actually running the experiment. 
A) just like the action spectrum with peaks at violet/blue and orange/red and a trough at yellow/green 
B) exactly inverted from the action spectrum with a peak for yellow/green 
C) perfectly flat because many wavelengths are used by chlorophyll 
D) a descending line because ultra-violet has more energy than infra-red 
E) There is no way to guess without actually running the experiment.

Question 5

Oxygen production in photosynthesis involves all of the following EXCEPT

Accepted Answer

A) photosystem one. 
B) photosystem two. 
C) splitting of water. 
D) light reactions. 
A) photosystem one. 
B) photosystem two. 
C) splitting of water. 
D) light reactions.

Question 6

If the Calvin cycle uses three molecules of CO2 to produce six molecules of G3P (glyceraldehydes-3-phosphate),but only one G3P molecule is used to form a carbohydrate molecule,what happens to the other carbons that were taken in?

Accepted Answer

A) Any unused CO2 is released into the environment. 
B) The other five G3P molecules are used to regenerate more RuBP. 
C) Any unused G3P molecule is converted and stored as starch. 
D) The remaining five G3P molecules are used to reduce CO2. 
A) Any unused CO2 is released into the environment. 
B) The other five G3P molecules are used to regenerate more RuBP. 
C) Any unused G3P molecule is converted and stored as starch. 
D) The remaining five G3P molecules are used to reduce CO2.

Question 7

decreases cell carbon dioxide levels,which increases the diffusion gradient.

Accepted Answer

A) True 
 B)False

Question 8

Fossil fuels are full of energy stored from photosynthesis millions of years ago.

Accepted Answer

A) True 
 B)False

Question 9

_______ is a product of the Calvin Cycle that is used to form glucose phosphate,amino acids or fatty acids.

Accepted Answer

A) ATP. 
B) ribulose bisphosphate (RuBP). 
C) glyceraldehyde-3-phospate (G3P). 
D) PEP carboxylase (PEPcase). 
E) carbon dioxide. 
A) ATP. 
B) ribulose bisphosphate (RuBP). 
C) glyceraldehyde-3-phospate (G3P). 
D) PEP carboxylase (PEPcase). 
E) carbon dioxide.

Question 10

immediately becomes a six-carbon sugar that is the base for starch,sucrose,cellulose,etc.

Accepted Answer

A) True 
 B)False

Question 11

When the stomata in a leaf close during the day,then

Accepted Answer

A) carbon dioxide in the air spaces in the leaf decreases. 
B) oxygen in the air spaces in the leaf increases. 
C) C3 plants carry on photorespiration,using O2 and producing PGA and CO2. 
D) all photosystems as well as photorespiration come to a halt. 
E) All choices but the halting of photosystems are correct. 
A) carbon dioxide in the air spaces in the leaf decreases. 
B) oxygen in the air spaces in the leaf increases. 
C) C3 plants carry on photorespiration,using O2 and producing PGA and CO2. 
D) all photosystems as well as photorespiration come to a halt. 
E) All choices but the halting of photosystems are correct.

Question 12

is a reaction assisted by large quantities of RuBP carboxylase enzyme.

Accepted Answer

A) True 
 B)False

Question 13

The function of sunlight in photosynthesis is to:

Accepted Answer

A) reduce NADPH to NADP 
B) fix O2 in the Calvin cycle 
C) excite electrons in chlorophyll 
D) combine carbon dioxide and water to form ATP and NADPH 
A) reduce NADPH to NADP 
B) fix O2 in the Calvin cycle 
C) excite electrons in chlorophyll 
D) combine carbon dioxide and water to form ATP and NADPH

Question 14

Which statement is NOT true about the noncyclic electron pathway?

Accepted Answer

A) Electrons are boosted to higher energy level in Photosystem I. 
B) Sunlight excites electrons in Photosystem II. 
C) It produces ATP. 
D) It produces NADPH. 
E) It produces carbohydrates through carbon dioxide fixation. 
A) Electrons are boosted to higher energy level in Photosystem I. 
B) Sunlight excites electrons in Photosystem II. 
C) It produces ATP. 
D) It produces NADPH. 
E) It produces carbohydrates through carbon dioxide fixation.

Question 15

Which of these is NOT a major photosynthetic pigment in plants?

Accepted Answer

A) chlorophyll a 
B) chlorophyll b 
C) chlorophyll c 
D) carotenoid pigments 
A) chlorophyll a 
B) chlorophyll b 
C) chlorophyll c 
D) carotenoid pigments

Question 16

To what does the term grana refer?

Accepted Answer

A) the double membrane of the chloroplast 
B) a flattened disk or sac in the chloroplast 
C) a stack of thylakoid membrane structures 
D) the central fluid-filled space of the chloroplast 
E) the cytochrome system in the membranes of the thylakoids 
A) the double membrane of the chloroplast 
B) a flattened disk or sac in the chloroplast 
C) a stack of thylakoid membrane structures 
D) the central fluid-filled space of the chloroplast 
E) the cytochrome system in the membranes of the thylakoids

Question 17

If plants were only able to undergo the cyclic pathway,which of the following would NOT be true?

Accepted Answer

A) Plants would not produce oxygen. 
B) Carbohydrate could still be produced but in much smaller quantities. 
C) More NADPH would be produced during the cyclic electron pathway. 
D) ATP production would decrease due to a smaller amount of H+ being available. 
A) Plants would not produce oxygen. 
B) Carbohydrate could still be produced but in much smaller quantities. 
C) More NADPH would be produced during the cyclic electron pathway. 
D) ATP production would decrease due to a smaller amount of H+ being available.

Question 18

The major enzyme that 'fixes' carbon dioxide is called

Accepted Answer

A) ribulose bisphosphate carboxylase (rubisco). 
B) glyceraldehyde-3-phospate (G3P). 
C) PEP carboxylase (PEPcase). 
D) lactate dehydrogenase. 
A) ribulose bisphosphate carboxylase (rubisco). 
B) glyceraldehyde-3-phospate (G3P). 
C) PEP carboxylase (PEPcase). 
D) lactate dehydrogenase.

Question 19

Photorespiration occurs mainly in:

Accepted Answer

A) C3 plants. 
B) C4 plants. 
C) CAM plants. 
D) all of the above. 
A) C3 plants. 
B) C4 plants. 
C) CAM plants. 
D) all of the above.

Question 20

Which statement is NOT true about photosystems?

Accepted Answer

A) Photosystem I passes electrons on to Photosystem II. 
B) Each photosystem contains numerous pigment molecules that act as antennas to capture light. 
C) Photosystem I contains a reaction center molecule that loses electrons which are then replaced by electrons from water. 
D) Electrons in the reaction center molecule are excited by absorbed solar energy and are passed along to an acceptor molecule. 
A) Photosystem I passes electrons on to Photosystem II. 
B) Each photosystem contains numerous pigment molecules that act as antennas to capture light. 
C) Photosystem I contains a reaction center molecule that loses electrons which are then replaced by electrons from water. 
D) Electrons in the reaction center molecule are excited by absorbed solar energy and are passed along to an acceptor molecule.

Exam 7: Photosynthesis

What organisms are capable of photosynthesis?

G3P (glyceraldehyde 3 phosphate)is used by plants for all of the following EXCEPT the formation of

Chemiosmotic ATP synthesis occurs in the cytosol of the cell.

Oxygen production in photosynthesis involves all of the following EXCEPT

If the Calvin cycle uses three molecules of CO2 to produce six molecules of G3P (glyceraldehydes-3-phosphate),but only one G3P molecule is used to form a carbohydrate molecule,what happens to the other carbons that were taken in?

decreases cell carbon dioxide levels,which increases the diffusion gradient.

Fossil fuels are full of energy stored from photosynthesis millions of years ago.

_______ is a product of the Calvin Cycle that is used to form glucose phosphate,amino acids or fatty acids.

immediately becomes a six-carbon sugar that is the base for starch,sucrose,cellulose,etc.

When the stomata in a leaf close during the day,then

is a reaction assisted by large quantities of RuBP carboxylase enzyme.

The function of sunlight in photosynthesis is to:

Which statement is NOT true about the noncyclic electron pathway?

Which of these is NOT a major photosynthetic pigment in plants?

To what does the term grana refer?

If plants were only able to undergo the cyclic pathway,which of the following would NOT be true?

The major enzyme that 'fixes' carbon dioxide is called

Photorespiration occurs mainly in:

Which statement is NOT true about photosystems?

A View of Life

Basic Chemistry

The Chemistry of Organic Molecules

Cell Structure and Function

Membrane Structure and Function

Metabolism: Energy and Enzymes

Cellular Respiration

The Cell Cycle and Cellular Reproduction

Meiosis and Sexual Reproduction

Mendelian Patterns of Inheritance

Molecular Biology of the Gene

Regulation of Gene Expression

Biotechnology and Genomics

Darwin and Evolution

How Populations Evolve

Speciation and Macroevolution

Origin and History of Life

Taxonomy,systematics,and Phylogeny

Viruses,bacteria,and Archaea

Protist Evolution and Diversity

Fungi Evolution and Diversity

Plant Evolution and Diversity

Flowering Plants: Structure and Organization

Flowering Plants: Nutrition and Transport

Flowering Plants: Control of Growth Responses

Flowering Plants: Reproduction

Invertebrate Evolution

Vertebrate Evolution

Human Evolution

Animal Organization and Homeostasis

Circulation and Cardiovascular Systems

The Lymphatic and Immune Systems

Digestive Systems and Nutrition

Respiratory Systems

Body Fluid Regulation and Excretory Systems

Neurons and Nervous Systems

Sense Organs

Locomotion and Support Systems

Hormones and Endocrine Systems

Reproductive Systems

Animal Development

Behavioral Ecology

Population Ecology

Community and Ecosystem Ecology

Major Ecosystems of the Biosphere

Conservation of Biodiversity

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If the Calvin cycle uses three molecules of CO₂ to produce six molecules of G3P (glyceraldehydes-3-phosphate),but only one G3P molecule is used to form a carbohydrate molecule,what happens to the other carbons that were taken in?