Question 1

In higher plants, thylakoids are arranged into stacks called ____.

Accepted Answer

A)  stroma 
B)  stomata 
C)  photosystems 
D)  grana 
E)  stromal lamellae 
A)  stroma 
B)  stomata 
C)  photosystems 
D)  grana 
E)  stromal lamellae D

Question 2

In photorespiration, there is a net gain of carbon.

Accepted Answer

A) True 
 B)False  False

Question 3

Photosystem II functions before photosystem I in the linear flow of electrons.

Accepted Answer

A) True 
 B)False  True

Question 4

Where does photosynthesis occur in plant cells?

Accepted Answer

A)  plasma membrane 
B)  Golgi bodies 
C)  cytosol 
D)  mitochondria 
E)  chloroplasts 
A)  plasma membrane 
B)  Golgi bodies 
C)  cytosol 
D)  mitochondria 
E)  chloroplasts

Question 5

Where does the Calvin cycle occur?

Accepted Answer

A)  thylakoid membrane 
B)  thylakoid lumen 
C)  stromal lamellae 
D)  cytosol 
E)  stroma 
A)  thylakoid membrane 
B)  thylakoid lumen 
C)  stromal lamellae 
D)  cytosol 
E)  stroma

Question 6

The chemical structure of chlorophyll is based on a complex organic ring structure, with a long hydrophobic side chain and a(n) ____ atom in the center of the ring.

Accepted Answer

A)  carbon 
B)  manganese 
C)  magnesium 
D)  iron 
E)  nitrogen 
A)  carbon 
B)  manganese 
C)  magnesium 
D)  iron 
E)  nitrogen

Question 7

The process by which CO2is released through the oxygenase activity of rubisco is called ____.

Accepted Answer

A)  photosynthesis 
B)  photophosphorylation 
C)  phosphorylative oxidation 
D)  photorespiration 
E)  oxidative phosphorylation 
A)  photosynthesis 
B)  photophosphorylation 
C)  phosphorylative oxidation 
D)  photorespiration 
E)  oxidative phosphorylation

Question 8

Which molecule associated with photorespiration is toxic to plant cells?

Accepted Answer

A)  3PGA 
B)  G3P 
C)  phosphoglycolate 
D)  glycolate 
E)  rubisco 
A)  3PGA 
B)  G3P 
C)  phosphoglycolate 
D)  glycolate 
E)  rubisco

Question 9

Why is rubisco considered an important enzyme?

Accepted Answer

Rubisco is the world's most abundant pro

Question 10

When a photon of light is absorbed by a pigment molecule, electrons jump to an excited state. What is one possible fate of these excited electrons?

Accepted Answer

A)  The excited electrons release energy in the form of a photon. 
B)  The excited electrons are transferred to an electron donor molecule. 
C)  The excited electrons revert to their ground state without releasing any energy. 
D)  The excited electrons jump to a lower energy level, releasing energy to a nearby pigment molecule. 
E)  The excited electrons jump to a lower energy level, releasing energy in the form of ATP. 
A)  The excited electrons release energy in the form of a photon. 
B)  The excited electrons are transferred to an electron donor molecule. 
C)  The excited electrons revert to their ground state without releasing any energy. 
D)  The excited electrons jump to a lower energy level, releasing energy to a nearby pigment molecule. 
E)  The excited electrons jump to a lower energy level, releasing energy in the form of ATP.

Question 11

The primary purpose of the light-dependent reactions is to ____.

Accepted Answer

A)  provide electrons and energy for the light-independent reactions 
B)  generate O2gas 
C)  make ADP in cyclic photophosphorylation 
D)  transfer electrons to the primary electron acceptors 
E)  produce sugars such as glucose 
A)  provide electrons and energy for the light-independent reactions 
B)  generate O2gas 
C)  make ADP in cyclic photophosphorylation 
D)  transfer electrons to the primary electron acceptors 
E)  produce sugars such as glucose

Question 12

Why is photorespiration more likely to occur during warm weather?

Accepted Answer

A)  Plants require warm weather (at least 23°
C)  to drive photosynthesis. 
B)  Plants are more likely to close their stomata in the nighttime than during the day. 
C)  Plants are more likely to dehydrate in warm weather, forcing them to close the stomata to conserve water, thus preventing CO2from entering the leaf. 
D)  The rubisco enzyme is very temperature sensitive and becomes less efficient in warmer temperatures, allowing it to fix O2instead of CO2. 
E)  Plants use up the water in their central vacuoles in warm weather, inhibiting the water-requiring light reactions; this in turn alters the activity of rubisco. 
A)  Plants require warm weather (at least 23°
C)  to drive photosynthesis. 
B)  Plants are more likely to close their stomata in the nighttime than during the day. 
C)  Plants are more likely to dehydrate in warm weather, forcing them to close the stomata to conserve water, thus preventing CO2from entering the leaf. 
D)  The rubisco enzyme is very temperature sensitive and becomes less efficient in warmer temperatures, allowing it to fix O2instead of CO2. 
E)  Plants use up the water in their central vacuoles in warm weather, inhibiting the water-requiring light reactions; this in turn alters the activity of rubisco.

Question 13

Which statement describes the role of photosynthesis in an ecosystem?

Accepted Answer

A)  Primary producers convert chemical energy to light energy. 
B)  Primary consumers rely directly on light energy. 
C)  Primary producers convert light energy to chemical energy as a service to the ecosystem, not for their own gain. 
D)  Primary consumers rely on primary producers to make light energy available in a usable form. 
E)  Primary producers make no contribution to the flow of energy into the ecosystem. 
A)  Primary producers convert chemical energy to light energy. 
B)  Primary consumers rely directly on light energy. 
C)  Primary producers convert light energy to chemical energy as a service to the ecosystem, not for their own gain. 
D)  Primary consumers rely on primary producers to make light energy available in a usable form. 
E)  Primary producers make no contribution to the flow of energy into the ecosystem.

Question 14

When does a CAM plant take in atmospheric CO2?

Accepted Answer

A)  daytime only 
B)  nighttime only 
C)  summer only 
D)  winter only 
E)  anytime the Calvin cycle is occurring 
A)  daytime only 
B)  nighttime only 
C)  summer only 
D)  winter only 
E)  anytime the Calvin cycle is occurring

Question 15

Atmospheric O2is a waste product of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 16

Which molecule(s) regulate(s) photosynthesis by sensing the metabolic status of the chloroplast and regulating proton flow out of the thylakoid lumen?

Accepted Answer

A)  ATP synthase 
B)  chlorophyll a 
C)  chlorophyll b 
D)  carotenoids 
E)  the antenna complex 
A)  ATP synthase 
B)  chlorophyll a 
C)  chlorophyll b 
D)  carotenoids 
E)  the antenna complex

Question 17

The Calvin cycle is sometimes referred to as the C3pathway because it generates a single three-carbon molecule for every three turns of the cycle.

Accepted Answer

A) True 
 B)False

Question 18

Malate produced by the CAM pathway in CAM plants ____.

Accepted Answer

A)  is immediately used in cellular respiration 
B)  is stored during the night in the central vacuole 
C)  is stored during the day in the stroma 
D)  diffuses to bundle sheath cells for degradation in the lysosomes 
E)  is stored in mesophyll cells 
A)  is immediately used in cellular respiration 
B)  is stored during the night in the central vacuole 
C)  is stored during the day in the stroma 
D)  diffuses to bundle sheath cells for degradation in the lysosomes 
E)  is stored in mesophyll cells

Question 19

Where can you find ATP synthase in a plant cell?

Accepted Answer

A)  in the thylakoid membrane only 
B)  in the mitochondrial inner membrane only 
C)  both the thylakoid and inner mitochondrial membranes 
D)  only in the nucleus 
E)  embedded in the plasma membrane 
A)  in the thylakoid membrane only 
B)  in the mitochondrial inner membrane only 
C)  both the thylakoid and inner mitochondrial membranes 
D)  only in the nucleus 
E)  embedded in the plasma membrane

Question 20

Photosynthesis is ____, while all other processes of life are ____.

Accepted Answer

A)  exergonic; exothermic 
B)  endergonic; endothermic 
C)  endergonic; exergonic 
D)  exergonic; endergonic 
E)  exergonic; endothermic 
A)  exergonic; exothermic 
B)  endergonic; endothermic 
C)  endergonic; exergonic 
D)  exergonic; endergonic 
E)  exergonic; endothermic

Exam 8: Photosynthesis

In higher plants, thylakoids are arranged into stacks called ____.

In photorespiration, there is a net gain of carbon.

Photosystem II functions before photosystem I in the linear flow of electrons.

Where does photosynthesis occur in plant cells?

Where does the Calvin cycle occur?

The chemical structure of chlorophyll is based on a complex organic ring structure, with a long hydrophobic side chain and a(n) ____ atom in the center of the ring.

The process by which CO2is released through the oxygenase activity of rubisco is called ____.

Which molecule associated with photorespiration is toxic to plant cells?

Why is rubisco considered an important enzyme?

When a photon of light is absorbed by a pigment molecule, electrons jump to an excited state. What is one possible fate of these excited electrons?

The primary purpose of the light-dependent reactions is to ____.

Why is photorespiration more likely to occur during warm weather?

Which statement describes the role of photosynthesis in an ecosystem?

When does a CAM plant take in atmospheric CO2?

Atmospheric O2is a waste product of photosynthesis.

Which molecule(s) regulate(s) photosynthesis by sensing the metabolic status of the chloroplast and regulating proton flow out of the thylakoid lumen?

The Calvin cycle is sometimes referred to as the C3pathway because it generates a single three-carbon molecule for every three turns of the cycle.

Malate produced by the CAM pathway in CAM plants ____.

Where can you find ATP synthase in a plant cell?

Photosynthesis is ____, while all other processes of life are ____.

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

The process by which CO₂is released through the oxygenase activity of rubisco is called ____.

When does a CAM plant take in atmospheric CO₂?

Atmospheric O₂is a waste product of photosynthesis.

The Calvin cycle is sometimes referred to as the C₃pathway because it generates a single three-carbon molecule for every three turns of the cycle.

Photosynthesis is , while all other processes of life are .