Question 1

Match each term with its definition.
-photoautotrophs

Accepted Answer

A) the generation of ATP via a proton gradient created by light-energized electrons moving down an electron transport chain 
B) the site of the Calvin cycle in the chloroplast 
C) complexes of light-absorbing molecules clustered in the thylakoid membranes of chloroplasts 
D) the addition of O2 to RuBP by rubisco, resulting in a net loss of carbon from the Calvin cycle 
E) the molecule used to store carbon overnight in CAM plants
F)organisms that use CO2 as their carbon source and light as their energy source 
A) the generation of ATP via a proton gradient created by light-energized electrons moving down an electron transport chain 
B) the site of the Calvin cycle in the chloroplast 
C) complexes of light-absorbing molecules clustered in the thylakoid membranes of chloroplasts 
D) the addition of O2 to RuBP by rubisco, resulting in a net loss of carbon from the Calvin cycle 
E) the molecule used to store carbon overnight in CAM plants
F)organisms that use CO2 as their carbon source and light as their energy source

Question 2

Photorespiration is even more detrimental because photoautotrophs cannot use phosphoglycolate.

Accepted Answer

A) True 
 B)False

Question 3

Where does the Calvin cycle occur?

Accepted Answer

A)  in the thylakoid membrane 
B)  in the cytosol 
C)  in the stromal lamellae 
D)  in the stroma 
A)  in the thylakoid membrane 
B)  in the cytosol 
C)  in the stromal lamellae 
D)  in the stroma

Question 4

Glucose is the only sugar produced from photosynthesis.

Accepted Answer

A) True 
 B)False

Question 5

Match the name of the process to its description.
-The process which directly produces G3P in the chloroplast.

Accepted Answer

A) noncyclic electron transport 
B) cyclic electron transport 
C) carbon fixation stage of the Calvin cycle 
D) carbon reduction stage of the Calvin cycle 
E) RuBP regeneration stage of the Calvin cycle 
A) noncyclic electron transport 
B) cyclic electron transport 
C) carbon fixation stage of the Calvin cycle 
D) carbon reduction stage of the Calvin cycle 
E) RuBP regeneration stage of the Calvin cycle

Question 6

What is the purpose of the Calvin cycle?

Accepted Answer

A)  to recover electrons lost when water was split 
B)  to counteract increasing atmospheric CO2 concentrations (global warming) 
C)  to capture photons of light 
D)  to produce sugars using CO2 as a carbon source 
A)  to recover electrons lost when water was split 
B)  to counteract increasing atmospheric CO2 concentrations (global warming) 
C)  to capture photons of light 
D)  to produce sugars using CO2 as a carbon source

Question 7

Which of the following best describes what a spectrophotometer is used for?

Accepted Answer

A)  to precisely determine the wavelengths of light reflected by a pigment 
B)  to precisely determine the rate of light absorbed by a pigment 
C)  to approximately determine the wavelengths of light absorbed by a pigment 
D)  to precisely determine the wavelengths of light absorbed by a pigment 
A)  to precisely determine the wavelengths of light reflected by a pigment 
B)  to precisely determine the rate of light absorbed by a pigment 
C)  to approximately determine the wavelengths of light absorbed by a pigment 
D)  to precisely determine the wavelengths of light absorbed by a pigment

Question 8

If the Calvin cycle could proceed without light reactions, choose the most appropriate process for each of the two reactions.
-produces O2

Accepted Answer

A) only light reactions 
B) only the Calvin cycle 
C) both light reactions and the Calvin cycle 
D) neither the light reactions nor the Calvin cycle 
A) only light reactions 
B) only the Calvin cycle 
C) both light reactions and the Calvin cycle 
D) neither the light reactions nor the Calvin cycle

Question 9

Why is photorespiration more likely to occur in 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 daytime heat than at night when it is cool. 
C)  Plants are more likely to dehydrate in warm weather, forcing them to close their stomata to conserve water; this prevents CO2 from entering the leaf. 
D)  The rubisco enzyme is very temperature-sensitive and becomes less selective in warmer temperatures, allowing it to fix O2 instead of CO2. 
A)  Plants require warm weather (at least 23°
C)  to drive photosynthesis. 
B)  Plants are more likely to close their stomata in the daytime heat than at night when it is cool. 
C)  Plants are more likely to dehydrate in warm weather, forcing them to close their stomata to conserve water; this prevents CO2 from entering the leaf. 
D)  The rubisco enzyme is very temperature-sensitive and becomes less selective in warmer temperatures, allowing it to fix O2 instead of CO2.

Question 10

Suppose that you found an unknown organism. You analyzed it and you found that it uses energy from light to convert CO2 into an organic form. Based on your findings, which of the following is this organism most likely?

Accepted Answer

A)  a photoautotroph 
B)  an autotroph 
C)  a heterotroph 
D)  a decomposer 
A)  a photoautotroph 
B)  an autotroph 
C)  a heterotroph 
D)  a decomposer

Question 11

Which of the following can be found in the reaction centre of a photosystem?

Accepted Answer

A)  a primary electron acceptor, a large number of proteins, and many chlorophyll a molecules 
B)  a primary electron acceptor, a small number of proteins, and many chlorophyll a molecules 
C)  a primary electron acceptor, a large number of proteins, and two chlorophyll a molecules 
D)  a primary electron acceptor, a small number of proteins, and two chlorophyll a molecules 
A)  a primary electron acceptor, a large number of proteins, and many chlorophyll a molecules 
B)  a primary electron acceptor, a small number of proteins, and many chlorophyll a molecules 
C)  a primary electron acceptor, a large number of proteins, and two chlorophyll a molecules 
D)  a primary electron acceptor, a small number of proteins, and two chlorophyll a molecules

Question 12

When does a CAM plant take in atmospheric CO2?

Accepted Answer

A)  from noon to midnight 
B)  in darkness only 
C)  in daylight only 
D)  from midnight to noon 
A)  from noon to midnight 
B)  in darkness only 
C)  in daylight only 
D)  from midnight to noon

Question 13

Which of the following are the most abundant of the chlorophylls?

Accepted Answer

A)  chlorophyll a and b 
B)  chlorophyll a and c 
C)  chlorophyll b and c 
D)  chlorophyll a, b, and c 
A)  chlorophyll a and b 
B)  chlorophyll a and c 
C)  chlorophyll b and c 
D)  chlorophyll a, b, and c

Question 14

Explain why we say nearly all life on Earth ultimately depends on the Sun for energy.

Accepted Answer

Photosynthetic organisms convert light e

Question 15

Which of the following is the traditional source of most oils?

Accepted Answer

A)  single-celled algae 
B)  crop plants 
C)  multicellular algae 
D)  any plants 
A)  single-celled algae 
B)  crop plants 
C)  multicellular algae 
D)  any plants

Exam 6: Photosynthesis

Match each term with its definition. -photoautotrophs

Photorespiration is even more detrimental because photoautotrophs cannot use phosphoglycolate.

Where does the Calvin cycle occur?

Glucose is the only sugar produced from photosynthesis.

Match the name of the process to its description. -The process which directly produces G3P in the chloroplast.

What is the purpose of the Calvin cycle?

Which of the following best describes what a spectrophotometer is used for?

If the Calvin cycle could proceed without light reactions, choose the most appropriate process for each of the two reactions. -produces O2

Why is photorespiration more likely to occur in warm weather?

Suppose that you found an unknown organism. You analyzed it and you found that it uses energy from light to convert CO2 into an organic form. Based on your findings, which of the following is this organism most likely?

Which of the following can be found in the reaction centre of a photosystem?

When does a CAM plant take in atmospheric CO2?

Which of the following are the most abundant of the chlorophylls?

Explain why we say nearly all life on Earth ultimately depends on the Sun for energy.

Which of the following is the traditional source of most oils?

Light and Life

The Cell: an Overview

Energy and Enzymes

Cell Membranes and Signaling

Cellular Respiration

Cell Cycles

Genetic Recombination

The Chromosomal Basis of Mendelian Inheritance

Genetic Linkage, Sex-Linkage, and Other Non-Mendelian Inheritance Mechanisms

DNA Structure, Replication, and Repair

Gene Structure Expression, and Mutation

Regulation of Gene Expression

Dna Technologies

Genomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Speciation and Macroevolution

Systematics and Phylogenetics: Revealing the Tree of Life

Humans and Evolution

Defining Life and Its Origins

Viruses, Viroids, and Prions: Infectious Biological Particles

Bacteria and Archaea

Protists

Fungi

Plants

Animals

Conservation of Biodiversity

Population Ecology

Species Interactions and Community Ecology

Ecosystems

Animal Behaviour

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Animal Nutrition

Gas Exchange: the Respiratory System

Internal Transport: the Circulatory System

Regulation of the Internal Environment: Water, Solutes, and Temperature

Control of Animal Processes: Endocrine Control

Animal Reproduction

Control of Animal Processes: Neural Control

Muscles, Skeletons, and Body Movements

Filters

If the Calvin cycle could proceed without light reactions, choose the most appropriate process for each of the two reactions. -produces O₂

Suppose that you found an unknown organism. You analyzed it and you found that it uses energy from light to convert CO₂ into an organic form. Based on your findings, which of the following is this organism most likely?

When does a CAM plant take in atmospheric CO₂?