Question 1

How do plants compensate for rubisco's inefficiency at sugar production?

Accepted Answer

A)  Plants make a large amount of the enzyme. 
B)  Plants fix the carbon twice at two different times of day. 
C)  Plants fix the carbon only once. 
D)  Plants store products in vacuoles. 
E)  Plants only fix carbon at night. 
A)  Plants make a large amount of the enzyme. 
B)  Plants fix the carbon twice at two different times of day. 
C)  Plants fix the carbon only once. 
D)  Plants store products in vacuoles. 
E)  Plants only fix carbon at night.

Question 2

Which source of energy powers the light-independent reactions of photosynthesis?

Accepted Answer

A)  light 
B)  ATP and NADPH 
C)  photosystem II 
D)  glucose 
E)  NADP+ 
A)  light 
B)  ATP and NADPH 
C)  photosystem II 
D)  glucose 
E)  NADP+

Question 3

In which of the following do the light-dependent reactions of photosynthesis take place?

Accepted Answer

A)  thylakoid membranes 
B)  stroma 
C)  the outermost membrane 
D)  between the outermost and innermost membranes 
E)  a combination of more than one of these 
A)  thylakoid membranes 
B)  stroma 
C)  the outermost membrane 
D)  between the outermost and innermost membranes 
E)  a combination of more than one of these

Question 4

The purpose of a photosystem is to convert ____.

Accepted Answer

A)  light energy into chemical energy 
B)  carbon dioxide into sugar 
C)  light energy into sugar 
D)  oxygen into carbon dioxide 
E)  light into oxygen 
A)  light energy into chemical energy 
B)  carbon dioxide into sugar 
C)  light energy into sugar 
D)  oxygen into carbon dioxide 
E)  light into oxygen

Question 5

When organic molecules are broken and carbon dioxide is released into the atmosphere through burning, this is essentially the reverse of____.

Accepted Answer

A)  photosynthesis 
B)  carbon fixation 
C)  the Calvin-Benson cycle 
D)  photorespiration 
E)  ATP production 
A)  photosynthesis 
B)  carbon fixation 
C)  the Calvin-Benson cycle 
D)  photorespiration 
E)  ATP production

Question 6

Which of the following is the correct order of wavelengths from lowest to highest energy?

Accepted Answer

A)  radio waves, microwaves, ultraviolet radiation, X-rays, gamma rays 
B)  gamma rays, X-rays, ultraviolet radiation, microwaves, radio waves 
C)  radio waves, ultraviolet radiation, microwaves, X-rays, gamma rays 
D)  gamma rays, ultraviolet radiation, X-rays, microwaves, radio waves 
E)  radio waves, ultraviolet radiation, X-rays, gamma rays, microwaves 
A)  radio waves, microwaves, ultraviolet radiation, X-rays, gamma rays 
B)  gamma rays, X-rays, ultraviolet radiation, microwaves, radio waves 
C)  radio waves, ultraviolet radiation, microwaves, X-rays, gamma rays 
D)  gamma rays, ultraviolet radiation, X-rays, microwaves, radio waves 
E)  radio waves, ultraviolet radiation, X-rays, gamma rays, microwaves

Question 7

The energy generated in the first electron transfer chain in the light-dependent reactions of photosynthesis is used to ____.

Accepted Answer

A)  split water into oxygen, hydrogen ions, and electrons 
B)  generate NADPH 
C)  power the ATP synthase enzyme to produce ATP 
D)  pump hydrogen ions into the thylakoid compartment 
E)  generate glucose 
A)  split water into oxygen, hydrogen ions, and electrons 
B)  generate NADPH 
C)  power the ATP synthase enzyme to produce ATP 
D)  pump hydrogen ions into the thylakoid compartment 
E)  generate glucose

Question 8

What does beta-carotene do?

Accepted Answer

A)  improve the efficiency pigments 
B)  act as coenzymes in glycolysis 
C)  neutralize free radicals 
D)  remove chlorophyll 
E)  enhance photosynthetic activity 
A)  improve the efficiency pigments 
B)  act as coenzymes in glycolysis 
C)  neutralize free radicals 
D)  remove chlorophyll 
E)  enhance photosynthetic activity

Question 9

What powers the ATP synthase enzyme in the light-dependent reactions of photosynthesis?

Accepted Answer

A)  energy from ATP 
B)  energy from NADPH 
C)  energy from the splitting of water 
D)  energy from electron transfer chains 
E)  energy from the flow of hydrogen ions 
A)  energy from ATP 
B)  energy from NADPH 
C)  energy from the splitting of water 
D)  energy from electron transfer chains 
E)  energy from the flow of hydrogen ions

Question 10

Which five-carbon molecule is the starting compound of the Calvin-Benson cycle?

Accepted Answer

A)  PGA 
B)  RuBP 
C)  NADPH 
D)  carbon dioxide 
E)  ATP 
A)  PGA 
B)  RuBP 
C)  NADPH 
D)  carbon dioxide 
E)  ATP

Question 11

The conversion of solar energy into chemical energy occurs during ____.

Accepted Answer

A)  glycolysis 
B)  photosynthesis 
C)  respiration 
D)  fermentation 
E)  chemosynthesis 
A)  glycolysis 
B)  photosynthesis 
C)  respiration 
D)  fermentation 
E)  chemosynthesis

Question 12

Which enzyme carries out carbon fixation during the Calvin-Benson cycle?

Accepted Answer

A)  nitrogen 
B)  protease 
C)  carbon 
D)  rubisco 
E)  NADPH 
A)  nitrogen 
B)  protease 
C)  carbon 
D)  rubisco 
E)  NADPH

Question 13

When chlorophyll absorbs light energy, ____.

Accepted Answer

A)  chlorophyll is converted to carotene 
B)  the molecules begin to move more rapidly 
C)  the plant becomes radioactive 
D)  electrons jump to a higher energy level 
E)  the molecules become ionized 
A)  chlorophyll is converted to carotene 
B)  the molecules begin to move more rapidly 
C)  the plant becomes radioactive 
D)  electrons jump to a higher energy level 
E)  the molecules become ionized

Question 14

Visible light comprises wavelengths that vary between ____ nanometers.

Accepted Answer

A)  380 and 750 
B)  350 and 750 
C)  390 and 780 
D)  340 and 740 
E)  320 and 740 
A)  380 and 750 
B)  350 and 750 
C)  390 and 780 
D)  340 and 740 
E)  320 and 740

Question 15

Matching
During the light-dependent reactions in the thylakoid membrane, light energy is converted to ATP.Match the specified labels in the diagram with their corresponding functions.   a.final acceptor of electrons
b.transfer of electrons between molecules
c.release of electrons into the photosystem
d.active transport of hydrogen ions to establish gradient
e.passive transport of hydrogen ions down a gradient
f.enzymatic phosphorylation
g.replacement of electrons by hydrolysis
-​Which process is indicated by label 4?

Accepted Answer

The answer of Matching
During the light-dependent reactions in the thylakoid...

Question 16

What are the advantages of plants that minimize photorespiration?

Accepted Answer

A)  High sugar production can be maintained on hot, dry days. 
B)  Water is not necessary for the light-dependent reactions. 
C)  Carbon dioxide is not needed for the light-independent reactions. 
D)  Less sugar is necessary for metabolic activities. 
E)  Light-dependent reactions are more efficient. 
A)  High sugar production can be maintained on hot, dry days. 
B)  Water is not necessary for the light-dependent reactions. 
C)  Carbon dioxide is not needed for the light-independent reactions. 
D)  Less sugar is necessary for metabolic activities. 
E)  Light-dependent reactions are more efficient.

Question 17

Matching
During the light-dependent reactions in the thylakoid membrane, light energy is converted to ATP.Match the specified labels in the diagram with their corresponding functions.   a.final acceptor of electrons
b.transfer of electrons between molecules
c.release of electrons into the photosystem
d.active transport of hydrogen ions to establish gradient
e.passive transport of hydrogen ions down a gradient
f.enzymatic phosphorylation
g.replacement of electrons by hydrolysis
-​What occurs at the end of the process indicated by label 6?

Accepted Answer

The answer of Matching
During the light-dependent reactions in the thylakoid...

Question 18

The carbon dioxide acceptor in the Calvin-Benson cycle of photosynthesis is ____.

Accepted Answer

A)  phosphoglycerate (PG
A)  
B)  ribulose bisphosphate (RuBP) 
C)  phosphoglyceraldehyde (PGAL) 
D)  glucose 
E)  phosphoenolpyruvate 
A)  phosphoglycerate (PG
A)  
B)  ribulose bisphosphate (RuBP) 
C)  phosphoglyceraldehyde (PGAL) 
D)  glucose 
E)  phosphoenolpyruvate

Question 19

Leaves appear red in the fall when ____.

Accepted Answer

A)  anthocyanin synthesis increases 
B)  chlorophylls are disassembled and recycled to allow other pigments to become more visible 
C)  other pigments, including the orange and yellow accessory pigments, are recycled 
D)  synthesis of other pigments, including the orange and yellow accessory pigments, increases 
E)  the red wavelength range of visible light increases due to changes in Earth's position relative to the sun 
A)  anthocyanin synthesis increases 
B)  chlorophylls are disassembled and recycled to allow other pigments to become more visible 
C)  other pigments, including the orange and yellow accessory pigments, are recycled 
D)  synthesis of other pigments, including the orange and yellow accessory pigments, increases 
E)  the red wavelength range of visible light increases due to changes in Earth's position relative to the sun

Question 20

In the fall, ____ become(s) visible in plants that are preparing for dormancy.

Accepted Answer

A)  accessory pigments 
B)  chlorophyll a 
C)  polysiphonia 
D)  gamma rays 
E)  radio waves 
A)  accessory pigments 
B)  chlorophyll a 
C)  polysiphonia 
D)  gamma rays 
E)  radio waves

Exam 5: Photosynthesis

How do plants compensate for rubisco's inefficiency at sugar production?

Which source of energy powers the light-independent reactions of photosynthesis?

In which of the following do the light-dependent reactions of photosynthesis take place?

The purpose of a photosystem is to convert ____.

When organic molecules are broken and carbon dioxide is released into the atmosphere through burning, this is essentially the reverse of____.

Which of the following is the correct order of wavelengths from lowest to highest energy?

The energy generated in the first electron transfer chain in the light-dependent reactions of photosynthesis is used to ____.

What does beta-carotene do?

What powers the ATP synthase enzyme in the light-dependent reactions of photosynthesis?

Which five-carbon molecule is the starting compound of the Calvin-Benson cycle?

The conversion of solar energy into chemical energy occurs during ____.

Which enzyme carries out carbon fixation during the Calvin-Benson cycle?

When chlorophyll absorbs light energy, ____.

Visible light comprises wavelengths that vary between ____ nanometers.

What are the advantages of plants that minimize photorespiration?

The carbon dioxide acceptor in the Calvin-Benson cycle of photosynthesis is ____.

Leaves appear red in the fall when ____.

In the fall, ____ become(s) visible in plants that are preparing for dormancy.

Invitation to Biology

Molecules of Life

Cell Structure

Energy and Metabolism

Releasing Chemical Energy

Dna Structure and Function

Gene Expression and Control

How Cells Reproduce

Patterns of Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Prokaryotes, Protists, and Viruses

Plants and Fungi

Animal Evolution

Population Ecology

Communities and Ecosystems

The Biosphere and Human Effects

Animal Tissues and Organs

How Animals Move

Circulation and Respiration

Immunity

Digestion and Excretion

Neural Control and the Senses

Endocrine Control

Animal Reproduction and Development

Plant Form and Function

Life Cycles of Flowering Plants

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