Question 1

Identify the stage of cellular respiration that occurs entirely outside of the mitochondria.

Accepted Answer

A) Citric acid cycle 
B) Electron transport chain 
C) Glycolysis 
D) All of the above occur outside of the mitochondria 
A) Citric acid cycle 
B) Electron transport chain 
C) Glycolysis 
D) All of the above occur outside of the mitochondria

Question 2

ATP molecules are charged during cellular respiration; where does the energy to charge the ATPs comes from?

Accepted Answer

A) The energy comes from the breaking of chemical bonds within glucose. 
B) The energy comes from the water. 
C) The energy comes from the building of carbon dioxide. 
D) The energy comes from the breaking of oxygen. 
A) The energy comes from the breaking of chemical bonds within glucose. 
B) The energy comes from the water. 
C) The energy comes from the building of carbon dioxide. 
D) The energy comes from the breaking of oxygen.

Question 3

Identify the role of carbon dioxide in photosynthesis.

Accepted Answer

A) It is split to become incorporated into sugars. 
B) It is split to release electrons. 
C) It is a by-product of the Calvin cyle 
D) It is the final electron acceptor. 
A) It is split to become incorporated into sugars. 
B) It is split to release electrons. 
C) It is a by-product of the Calvin cyle 
D) It is the final electron acceptor.

Question 4

What is a photosystem?

Accepted Answer

A) Stacks of thylakoids 
B) A double-membrane organelle containing thylakoids 
C) Clusters of pigments and proteins that capture light energy 
D) A leaf or any green part of the plant 
A) Stacks of thylakoids 
B) A double-membrane organelle containing thylakoids 
C) Clusters of pigments and proteins that capture light energy 
D) A leaf or any green part of the plant

Question 5

How do we know green light is not absorbed by chlorophyll?

Accepted Answer

A) Green light is the wavelength of light that is reflected instead of absorbed by the chloroplasts. 
B) Not enough of the green light penetrates the ozone layer and makes it to the plant. 
C) Green light has such a small wavelength that most of it goes straight through the leaves without interacting with the chlorophyll. 
D) Green light does not have enough energy to excite an electron in the photosystem. 
A) Green light is the wavelength of light that is reflected instead of absorbed by the chloroplasts. 
B) Not enough of the green light penetrates the ozone layer and makes it to the plant. 
C) Green light has such a small wavelength that most of it goes straight through the leaves without interacting with the chlorophyll. 
D) Green light does not have enough energy to excite an electron in the photosystem.

Question 6

What is the role of light in photosynthesis?

Accepted Answer

A) It is the source of electrons. 
B) It fixes carbon into sugars. 
C) It excites electrons. 
D) It splits ATP molecules. 
A) It is the source of electrons. 
B) It fixes carbon into sugars. 
C) It excites electrons. 
D) It splits ATP molecules.

Question 7

What are the main by-products of cellular respiration?

Accepted Answer

A) Oxygen and sugars 
B) Sugars and water 
C) Water and carbon dioxide 
D) Carbon dioxide and oxygen 
A) Oxygen and sugars 
B) Sugars and water 
C) Water and carbon dioxide 
D) Carbon dioxide and oxygen

Question 8

Which processes can be carried out by producers?

Accepted Answer

A) Only photosynthesis 
B) Only cellular respiration 
C) Both photosynthesis and cellular respiration 
D) Neither photosynthesis nor cellular respiration 
A) Only photosynthesis 
B) Only cellular respiration 
C) Both photosynthesis and cellular respiration 
D) Neither photosynthesis nor cellular respiration

Question 9

What happens during the electron transport chain of the light reactions?

Accepted Answer

A) The electrons get increasingly excited as they move up the chain. 
B) The electrons release their energy, which is captured by ATP and NADPH. 
C) The electrons get fused with each other to capture energy. 
D) The electrons interact with oxygen to move up the chain. 
A) The electrons get increasingly excited as they move up the chain. 
B) The electrons release their energy, which is captured by ATP and NADPH. 
C) The electrons get fused with each other to capture energy. 
D) The electrons interact with oxygen to move up the chain.

Question 10

What does it mean to "fix" carbon, and during which stage of photosynthesis is carbon fixed?

Accepted Answer

Carbon is fixed during photosy

Question 11

Which processes can be carried out by consumers?

Accepted Answer

A) Only photosynthesis 
B) Only cellular respiration 
C) Both photosynthesis and cellular respiration 
D) Neither photosynthesis nor cellular respiration 
A) Only photosynthesis 
B) Only cellular respiration 
C) Both photosynthesis and cellular respiration 
D) Neither photosynthesis nor cellular respiration

Question 12

Yeast is used to produce beer and wine but can also make bread rise.All of these processes involve the production of alcohol.Explain why you can eat bread and not get drunk.

Accepted Answer

A) The heat of cooking bakes out the alcohol. 
B) The amount of alcohol produced is too small to be noticeable. 
C) The bread-making process produces ethyl alcohol, not isopropyl alcohol. 
D) The bread-making process produces isopropyl alcohol, not ethyl alcohol. 
A) The heat of cooking bakes out the alcohol. 
B) The amount of alcohol produced is too small to be noticeable. 
C) The bread-making process produces ethyl alcohol, not isopropyl alcohol. 
D) The bread-making process produces isopropyl alcohol, not ethyl alcohol.

Question 13

Choose the best explanation as to why both consumers and producers perform cellular respiration.

Accepted Answer

A) Although they may obtain their sugars in different ways, both consumers and producers rely on cellular respiration to make ATP. 
B) Both consumers and producers perform cellular respiration to produce the sugars needed to fuel the energy of life. 
C) Both consumers and producers perform cellular respiration to produce the oxygen necessary to sustain life. 
D) Both consumers and producers perform cellular respiration to produce the heat necessary to sustain life. 
A) Although they may obtain their sugars in different ways, both consumers and producers rely on cellular respiration to make ATP. 
B) Both consumers and producers perform cellular respiration to produce the sugars needed to fuel the energy of life. 
C) Both consumers and producers perform cellular respiration to produce the oxygen necessary to sustain life. 
D) Both consumers and producers perform cellular respiration to produce the heat necessary to sustain life.

Question 14

At what stage(s) is carbon dioxide needed in photosynthesis?

Accepted Answer

A) At the very beginning of the light reactions 
B) At the end of the light reactions 
C) During the Calvin cycle 
D) During both the light reactions and the Calvin cycle 
A) At the very beginning of the light reactions 
B) At the end of the light reactions 
C) During the Calvin cycle 
D) During both the light reactions and the Calvin cycle

Question 15

Where do the electrons that are excited by the energy in sunlight come from?

Accepted Answer

A) NADPH 
B) Sunlight 
C) Sugar 
D) Water 
A) NADPH 
B) Sunlight 
C) Sugar 
D) Water

Question 16

What is a possible reason for oxygen to be so low by the end of the night?

Accepted Answer

A) Algae produce oxygen as a by-product of photosynthesis during the day, and not at night, so oxygen runs out by the end of the night; fish are not linked to the low oxygen. 
B) Fish consume oxygen during the night, and oxygen starts to run out by dawn; algae are not linked to the low oxygen. 
C) Algae produce oxygen as a by-product of photosynthesis during the day, but not at night, so oxygen runs out by the end of the night; in addition, fish continue to consume oxygen during the night, which further reduces the oxygen by the end of the night. 
D) Neither fish nor algae or linked to the low oxygen found at the end of the night. 
A) Algae produce oxygen as a by-product of photosynthesis during the day, and not at night, so oxygen runs out by the end of the night; fish are not linked to the low oxygen. 
B) Fish consume oxygen during the night, and oxygen starts to run out by dawn; algae are not linked to the low oxygen. 
C) Algae produce oxygen as a by-product of photosynthesis during the day, but not at night, so oxygen runs out by the end of the night; in addition, fish continue to consume oxygen during the night, which further reduces the oxygen by the end of the night. 
D) Neither fish nor algae or linked to the low oxygen found at the end of the night.

Question 17

Which molecule has a higher potential energy?

Accepted Answer

A) ADP 
B) ATP 
C) ANP 
D) NADP+ 
A) ADP 
B) ATP 
C) ANP 
D) NADP+

Question 18

Since energy cannot be created, which arrow represents the energy that will be converted to chemical energy the chameleon can later use?

Accepted Answer

A) Arrow A, the tongue extending 
B) Arrow B, the insect being eaten 
C) Arrow C, sunlight striking the chameleon 
D) Arrow D, heat radiating from the chameleon 
A) Arrow A, the tongue extending 
B) Arrow B, the insect being eaten 
C) Arrow C, sunlight striking the chameleon 
D) Arrow D, heat radiating from the chameleon

Question 19

Respiration is called aerobic because ________.

Accepted Answer

A) it happens in the absence of oxygen 
B) it requires oxygen 
C) it requires carbon dioxide 
D) it happens in mitochondria 
A) it happens in the absence of oxygen 
B) it requires oxygen 
C) it requires carbon dioxide 
D) it happens in mitochondria

Question 20

Select the ultimate source of energy for nearly every organism on this planet.

Accepted Answer

A) Plants 
B) ATP molecules 
C) The sun 
D) Sugars 
A) Plants 
B) ATP molecules 
C) The sun 
D) Sugars

Identify the stage of cellular respiration that occurs entirely outside of the mitochondria.

ATP molecules are charged during cellular respiration; where does the energy to charge the ATPs comes from?

Identify the role of carbon dioxide in photosynthesis.

What is a photosystem?

How do we know green light is not absorbed by chlorophyll?

What is the role of light in photosynthesis?

What are the main by-products of cellular respiration?

Which processes can be carried out by producers?

What happens during the electron transport chain of the light reactions?

What does it mean to "fix" carbon, and during which stage of photosynthesis is carbon fixed?

Which processes can be carried out by consumers?

Yeast is used to produce beer and wine but can also make bread rise.All of these processes involve the production of alcohol.Explain why you can eat bread and not get drunk.

Choose the best explanation as to why both consumers and producers perform cellular respiration.

At what stage(s) is carbon dioxide needed in photosynthesis?

Where do the electrons that are excited by the energy in sunlight come from?

What is a possible reason for oxygen to be so low by the end of the night?

Which molecule has a higher potential energy?

Since energy cannot be created, which arrow represents the energy that will be converted to chemical energy the chameleon can later use?

Respiration is called aerobic because ________.

Select the ultimate source of energy for nearly every organism on this planet.

An Introduction to the Science of Life

The Chemistry of Life

The Cell: The Fundamental Unit of Life

Chromosomes and Inheritance

DNA: The Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters

Exam 4: Energy and Life

Identify the stage of cellular respiration that occurs entirely outside of the mitochondria.

ATP molecules are charged during cellular respiration; where does the energy to charge the ATPs comes from?

Identify the role of carbon dioxide in photosynthesis.

What is a photosystem?

How do we know green light is not absorbed by chlorophyll?

What is the role of light in photosynthesis?

What are the main by-products of cellular respiration?

Which processes can be carried out by producers?

What happens during the electron transport chain of the light reactions?

What does it mean to "fix" carbon, and during which stage of photosynthesis is carbon fixed?

Which processes can be carried out by consumers?

Yeast is used to produce beer and wine but can also make bread rise.All of these processes involve the production of alcohol.Explain why you can eat bread and not get drunk.

Choose the best explanation as to why both consumers and producers perform cellular respiration.

At what stage(s) is carbon dioxide needed in photosynthesis?

Where do the electrons that are excited by the energy in sunlight come from?

What is a possible reason for oxygen to be so low by the end of the night?

Which molecule has a higher potential energy?

Since energy cannot be created, which arrow represents the energy that will be converted to chemical energy the chameleon can later use?

Respiration is called aerobic because ________.

Select the ultimate source of energy for nearly every organism on this planet.

An Introduction to the Science of Life

The Chemistry of Life

The Cell: The Fundamental Unit of Life

Chromosomes and Inheritance

DNA: The Molecule of Life

Darwinian Evolution

Biodiversity 1: Microscopic Organisms

Biodiversity 2: Fungi and Plants

Biodiversity 3: Animals

Human Body Systems

Ecology

Biology The Core: Appendix

Filters