Question 1

Which of the following is required for photons to be used as a source of energy?

Accepted Answer

A)  They must be particles. 
B)  They must be energized. 
C)  They must be absorbed by a molecule. 
D)  They must be reflected by a molecule. 
A)  They must be particles. 
B)  They must be energized. 
C)  They must be absorbed by a molecule. 
D)  They must be reflected by a molecule.

Question 2

If the Calvin cycle could proceed without light reactions, choose the most appropriate process for each of the two reactions.
-creates a proton gradient

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 3

Why is the molecule of chlorophyll a in photosystem I's reaction centre known as P700?

Accepted Answer

A)  because 700 molecules of NADPH are generated per photon of light absorbed 
B)  because it absorbs 700 photons per minute 
C)  because exactly 700 accessory pigments are in the photosystem 
D)  because it absorbs photons with a wavelength of 700 nm 
A)  because 700 molecules of NADPH are generated per photon of light absorbed 
B)  because it absorbs 700 photons per minute 
C)  because exactly 700 accessory pigments are in the photosystem 
D)  because it absorbs photons with a wavelength of 700 nm

Question 4

Match the name of the process to its description.
-The process which produces additional ATP for the Calvin cycle.

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 5

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

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 6

Why is the molecule of chlorophyll a in photosystem II's reaction centre known as P680?

Accepted Answer

A)  because it absorbs 680 photons per minute 
B)  because it will generate 680 molecules of ATP per photon absorbed 
C)  because it absorbs photons with a wavelength of 680 nm 
D)  because exactly 680 accessory pigments are in the photosystem 
A)  because it absorbs 680 photons per minute 
B)  because it will generate 680 molecules of ATP per photon absorbed 
C)  because it absorbs photons with a wavelength of 680 nm 
D)  because exactly 680 accessory pigments are in the photosystem

Question 7

Match the name of the process to its description.
-The process which uses enzyme rubisco to create simpler sugars.

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 8

Which thylakoid membrane component does photosystem I draw its electrons from?

Accepted Answer

A)  NADP+ reductase 
B)  plastocyanin 
C)  photosystem II 
D)  water 
A)  NADP+ reductase 
B)  plastocyanin 
C)  photosystem II 
D)  water

Question 9

Explain why it is important, from a global standpoint, to try to improve the efficiency of photosynthesis in common crops. Specify which aspect(s) of photosynthesis we should target.

Accepted Answer

The land available for agriculture is li

Question 10

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all.  
-membrane most important in generating a proton gradient for ATP synthesis

Accepted Answer

The answer of Match the terms and descriptions with the...

Question 11

Atmospheric O2 is actually a waste product of photosynthesis.

Accepted Answer

A) True 
 B)False

Question 12

Where do the electrons from NADPH go in the Calvin cycle?

Accepted Answer

A)  They are added to oxygen, just like in cellular respiration. 
B)  They are used to regenerate RuBP from G3P. 
C)  They are transferred to rubisco. 
D)  They are added to 1,3-bisphosphoglycerate. 
A)  They are added to oxygen, just like in cellular respiration. 
B)  They are used to regenerate RuBP from G3P. 
C)  They are transferred to rubisco. 
D)  They are added to 1,3-bisphosphoglycerate.

Question 13

Match each term with its definition.
-photorespiration

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 14

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all.  
-inner membrane

Accepted Answer

The answer of Match the terms and descriptions with the...

Question 15

Which of the following describes the role of the photosynthetic pigments?

Accepted Answer

A)  to absorb photons of light and transfer the energy to neighbouring molecules 
B)  to absorb energy and transfer photons of light to neighbouring molecules 
C)  to absorb photons of light and energy 
D)  to transfer photons of light and energy 
A)  to absorb photons of light and transfer the energy to neighbouring molecules 
B)  to absorb energy and transfer photons of light to neighbouring molecules 
C)  to absorb photons of light and energy 
D)  to transfer photons of light and energy

Question 16

Standard photosynthesis (C3) plants are more susceptible to photorespiration than either C4 or CAM plants. Why do most plants lack the C4 pathway?

Accepted Answer

A)  because rubisco is more efficient in C3 plants when compared to rubisco in C4 and CAM plants 
B)  because C4 and CAM pathways have an energetic cost that makes them advantageous in only very hot and/or arid environments 
C)  because photorespiration is not a serious problem for most plants 
D)  because most plant species do not have vacuoles in their cells to store the malate generated from CO2 taken in during the night 
A)  because rubisco is more efficient in C3 plants when compared to rubisco in C4 and CAM plants 
B)  because C4 and CAM pathways have an energetic cost that makes them advantageous in only very hot and/or arid environments 
C)  because photorespiration is not a serious problem for most plants 
D)  because most plant species do not have vacuoles in their cells to store the malate generated from CO2 taken in during the night

Question 17

Which of these pigments absorb light in photosynthesis?

Accepted Answer

A)  green pigments called chlorophylls and blue pigments called carotenoids 
B)  green pigments called carotenoids and yellow-orange pigments called chlorophylls 
C)  green pigments called chlorophylls and red-orange pigments called carotenoids 
D)  green pigments called chlorophylls and yellow-orange pigments called carotenoids 
A)  green pigments called chlorophylls and blue pigments called carotenoids 
B)  green pigments called carotenoids and yellow-orange pigments called chlorophylls 
C)  green pigments called chlorophylls and red-orange pigments called carotenoids 
D)  green pigments called chlorophylls and yellow-orange pigments called carotenoids

Question 18

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all.  
-site of the Calvin cycle

Accepted Answer

The answer of Match the terms and descriptions with the...

Question 19

Which Calvin cycle products are used in the light reactions?

Accepted Answer

A)  G3P, ATP, and NADPH 
B)  electrons from CO2 
C)  ADP, Pi, and NADP+ 
D)  O2, water, and ATP 
A)  G3P, ATP, and NADPH 
B)  electrons from CO2 
C)  ADP, Pi, and NADP+ 
D)  O2, water, and ATP

Question 20

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all.  
-thylakoid lumen

Accepted Answer

The answer of Match the terms and descriptions with the...

Exam 6: Photosynthesis

Which of the following is required for photons to be used as a source of energy?

If the Calvin cycle could proceed without light reactions, choose the most appropriate process for each of the two reactions. -creates a proton gradient

Why is the molecule of chlorophyll a in photosystem I's reaction centre known as P700?

Match the name of the process to its description. -The process which produces additional ATP for the Calvin cycle.

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

Why is the molecule of chlorophyll a in photosystem II's reaction centre known as P680?

Match the name of the process to its description. -The process which uses enzyme rubisco to create simpler sugars.

Which thylakoid membrane component does photosystem I draw its electrons from?

Explain why it is important, from a global standpoint, to try to improve the efficiency of photosynthesis in common crops. Specify which aspect(s) of photosynthesis we should target.

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all. -membrane most important in generating a proton gradient for ATP synthesis

Atmospheric O2 is actually a waste product of photosynthesis.

Where do the electrons from NADPH go in the Calvin cycle?

Match each term with its definition. -photorespiration

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all. -inner membrane

Which of the following describes the role of the photosynthetic pigments?

Standard photosynthesis (C3) plants are more susceptible to photorespiration than either C4 or CAM plants. Why do most plants lack the C4 pathway?

Which of these pigments absorb light in photosynthesis?

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all. -site of the Calvin cycle

Which Calvin cycle products are used in the light reactions?

Match the terms and descriptions with the correct labelled part in the fllowing illustration. A labelled part may be used once, more than once, or not at all. -thylakoid lumen

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 NADP⁺

Atmospheric O₂ is actually a waste product of photosynthesis.

Standard photosynthesis (C₃) plants are more susceptible to photorespiration than either C₄ or CAM plants. Why do most plants lack the C₄ pathway?