Question 1

Why is light a source of energy?

Accepted Answer

A)  It excites an electron within a pigment molecule, which then serves as a source of light energy that can be used for work. 
B)  It excites an electron within a pigment molecule, which then serves as a source of heat energy that can be used for work. 
C)  It excites an electron within a pigment molecule, which then serves as a source of potential energy that can be used for work. 
D)  It excites an electron within a pigment molecule, which then serves as a source of kinetic energy that can be used for work. 
A)  It excites an electron within a pigment molecule, which then serves as a source of light energy that can be used for work. 
B)  It excites an electron within a pigment molecule, which then serves as a source of heat energy that can be used for work. 
C)  It excites an electron within a pigment molecule, which then serves as a source of potential energy that can be used for work. 
D)  It excites an electron within a pigment molecule, which then serves as a source of kinetic energy that can be used for work.

Question 2

A planarian orients itself such that an equal amount of light falls on its two ocelli so that the amount of light enhances as the animal swims.

Accepted Answer

A) True 
 B)False

Question 3

Bioluminescence has been reported in land plants or higher vertebrates.

Accepted Answer

A) True 
 B)False

Question 4

Why do red and blue light drive photosynthesis more effectively than green light?

Accepted Answer

A)  because chlorophyll cannot absorb red and blue light 
B)  because chlorophyll can absorb green light 
C)  because chlorophyll can absorb red and blue light 
D)  because chlorophyll cannot absorb green light 
A)  because chlorophyll cannot absorb red and blue light 
B)  because chlorophyll can absorb green light 
C)  because chlorophyll can absorb red and blue light 
D)  because chlorophyll cannot absorb green light

Question 5

How is the eye of a tarsier similar to the eye of a giant squid?

Accepted Answer

A)  Both are compound. 
B)  Both are simple. 
C)  Both are blue. 
D)  Both are blind. 
A)  Both are compound. 
B)  Both are simple. 
C)  Both are blue. 
D)  Both are blind.

Question 6

What does photosynthesis capture?

Accepted Answer

A)  chemical energy 
B)  light energy 
C)  heat 
D)  magnetic energy 
A)  chemical energy 
B)  light energy 
C)  heat 
D)  magnetic energy

Question 7

What is the importance of the pigment melanin in humans?

Accepted Answer

A)  It prevents destruction of vitamin D caused by UV light. 
B)  It allows formation of vitamin B caused by UV light. 
C)  It prevents DNA damage by absorbing UV light. 
D)  It prevents DNA damage by reflecting UV light. 
A)  It prevents destruction of vitamin D caused by UV light. 
B)  It allows formation of vitamin B caused by UV light. 
C)  It prevents DNA damage by absorbing UV light. 
D)  It prevents DNA damage by reflecting UV light.

Question 8

Which of the following makes pollination important?

Accepted Answer

A)  It enables recognition of male and female flowers in plants. 
B)  It enables the pollinator to feed. 
C)  It enables fertilization and reproduction in plants, while the pollinator has no benefits. 
D)  It enables fertilization and reproduction in plants, while the pollinator can feed. 
A)  It enables recognition of male and female flowers in plants. 
B)  It enables the pollinator to feed. 
C)  It enables fertilization and reproduction in plants, while the pollinator has no benefits. 
D)  It enables fertilization and reproduction in plants, while the pollinator can feed.

Question 9

The light sensor in a Chlamydomonas cell allows it to sense both light direction and light intensity. What do we call this light sensor?

Accepted Answer

A)  a vacuole 
B)  an eye 
C)  a spot 
D)  an eyespot 
A)  a vacuole 
B)  an eye 
C)  a spot 
D)  an eyespot

Question 10

Which phrase best explains why some photosynthesis still occurs under green light?

Accepted Answer

A)  because chlorophyll absorbs red and blue light 
B)  because many different pigments are involved in photosynthesis 
C)  because chlorophyll absorbs green light 
D)  because chlorophyll is green in colour 
A)  because chlorophyll absorbs red and blue light 
B)  because many different pigments are involved in photosynthesis 
C)  because chlorophyll absorbs green light 
D)  because chlorophyll is green in colour

Question 11

Suppose that you observe an organism that moves by phototaxis. Which of the following is the organism most likely doing?

Accepted Answer

A)  swimming toward or away from a heat source 
B)  swimming toward or away from a magnetic source 
C)  swimming toward or away from a light source 
D)  swimming toward or away from a chemical source 
A)  swimming toward or away from a heat source 
B)  swimming toward or away from a magnetic source 
C)  swimming toward or away from a light source 
D)  swimming toward or away from a chemical source

Question 12

What does phototaxis allow a cell to do?

Accepted Answer

A)  stay in the optimum light environment 
B)  stay in the optimum magnetic environment 
C)  stay in the optimum chemical environment 
D)  stay in the optimum climate environment 
A)  stay in the optimum light environment 
B)  stay in the optimum magnetic environment 
C)  stay in the optimum chemical environment 
D)  stay in the optimum climate environment

Question 13

Although they are now blind, mole rats had ancestors with functional eyes.

Accepted Answer

A) True 
 B)False

Question 14

Which term refers to an electromagnetic radiation that is of the shortest wavelength and highest energy?

Accepted Answer

A)  radio waves 
B)  gamma rays 
C)  UV light 
D)  X-rays 
A)  radio waves 
B)  gamma rays 
C)  UV light 
D)  X-rays

Question 15

"Milky seas" is a phenomenon resulting from bioluminescence of marine bacteria.

Accepted Answer

A) True 
 B)False

Question 16

What is the purpose of the functional photoreceptors in mole rats, even though the image-forming part of the brain is dramatically reduced?

Accepted Answer

A)  It allows them to set their biological clock properly, which is necessary for reproduction. 
B)  It allows them to hunt successfully. 
C)  It allows them to see other individuals in their group properly. 
D)  It allows them to set their biological clock properly, which is necessary for the proper regulation of circadian rhythm. 
A)  It allows them to set their biological clock properly, which is necessary for reproduction. 
B)  It allows them to hunt successfully. 
C)  It allows them to see other individuals in their group properly. 
D)  It allows them to set their biological clock properly, which is necessary for the proper regulation of circadian rhythm.

Question 17

Jet lag is a result of the disturbance of your biological clock.

Accepted Answer

A) True 
 B)False

Question 18

When does the electron become excited?

Accepted Answer

A)  when the energy of the photon is transferred to it 
B)  when the light is not absorbed 
C)  when the energy of the photon is taken away from it 
D)  when the light does not exist 
A)  when the energy of the photon is transferred to it 
B)  when the light is not absorbed 
C)  when the energy of the photon is taken away from it 
D)  when the light does not exist

Question 19

Why is ultraviolet radiation damaging?

Accepted Answer

A)  Because it consists of wavelengths that are longer than visible light, the energy of the photons of ultraviolet light is greater and more damaging to biological molecules. 
B)  Because it consists of wavelengths that are shorter than visible light, the energy of the photons of ultraviolet light is greater and more damaging to biological molecules. 
C)  Because it consists of wavelengths that are shorter than visible light, the energy of the photons of ultraviolet light is lesser and more damaging to biological molecules. 
D)  Because it consists of wavelengths that are shorter than visible light, the energy of the photons of ultraviolet light is lesser and less damaging to biological molecules. 
A)  Because it consists of wavelengths that are longer than visible light, the energy of the photons of ultraviolet light is greater and more damaging to biological molecules. 
B)  Because it consists of wavelengths that are shorter than visible light, the energy of the photons of ultraviolet light is greater and more damaging to biological molecules. 
C)  Because it consists of wavelengths that are shorter than visible light, the energy of the photons of ultraviolet light is lesser and more damaging to biological molecules. 
D)  Because it consists of wavelengths that are shorter than visible light, the energy of the photons of ultraviolet light is lesser and less damaging to biological molecules.

Question 20

Suppose that some marine bacteria that are normally bioluminescent are NOT any more. As a result, what would the bacteria most likely be unable to do?

Accepted Answer

A)  They would be unable to scare off potential predators. 
B)  They would be unable to feed. 
C)  They would be unable to communicate. 
D)  They would be unable to reproduce. 
A)  They would be unable to scare off potential predators. 
B)  They would be unable to feed. 
C)  They would be unable to communicate. 
D)  They would be unable to reproduce.

Exam 1: Light and Life

Why is light a source of energy?

A planarian orients itself such that an equal amount of light falls on its two ocelli so that the amount of light enhances as the animal swims.

Bioluminescence has been reported in land plants or higher vertebrates.

Why do red and blue light drive photosynthesis more effectively than green light?

How is the eye of a tarsier similar to the eye of a giant squid?

What does photosynthesis capture?

What is the importance of the pigment melanin in humans?

Which of the following makes pollination important?

The light sensor in a Chlamydomonas cell allows it to sense both light direction and light intensity. What do we call this light sensor?

Which phrase best explains why some photosynthesis still occurs under green light?

Suppose that you observe an organism that moves by phototaxis. Which of the following is the organism most likely doing?

What does phototaxis allow a cell to do?

Although they are now blind, mole rats had ancestors with functional eyes.

Which term refers to an electromagnetic radiation that is of the shortest wavelength and highest energy?

"Milky seas" is a phenomenon resulting from bioluminescence of marine bacteria.

What is the purpose of the functional photoreceptors in mole rats, even though the image-forming part of the brain is dramatically reduced?

Jet lag is a result of the disturbance of your biological clock.

When does the electron become excited?

Why is ultraviolet radiation damaging?

Suppose that some marine bacteria that are normally bioluminescent are NOT any more. As a result, what would the bacteria most likely be unable to do?

The Cell: an Overview

Energy and Enzymes

Cell Membranes and Signaling

Cellular Respiration

Photosynthesis

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

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