Question 1

Some kinds of drain cleaners use enzymes rather than strong,more dangerous chemicals.These enzymes must be able to

Accepted Answer

A) catalyze a catabolic reaction. 
B) raise the energy of the reaction that clears the clog. 
C) create energy that can be used to break up the clog. 
D) catalyze an anabolic reaction. 
A) catalyze a catabolic reaction. 
B) raise the energy of the reaction that clears the clog. 
C) create energy that can be used to break up the clog. 
D) catalyze an anabolic reaction. A

Question 2

Chemical reactions that break down lipids are

Accepted Answer

A) catabolic. 
B) anabolic. 
C) metabolic. 
D) respiration. 
A) catabolic. 
B) anabolic. 
C) metabolic. 
D) respiration. A

Question 3

MATCHING
For each characteristic below, state if it applies to photosynthesis and/or cellular respiration.
-produces light energy

Accepted Answer

A) photosynthesis only 
B) cellular respiration only 
C) both photosynthesis and cellular respiration 
D) neither photosynthesis nor cellular respiration 
A) photosynthesis only 
B) cellular respiration only 
C) both photosynthesis and cellular respiration 
D) neither photosynthesis nor cellular respiration D

Question 4

Humans store sugars in the form of glycogen.Glycogen is made by linking many glucose molecules together.This process is ________.

Accepted Answer

The answer of Humans store sugars in the form of...

Question 5

During exercise,the increase in respiration rate and heartbeat speed are driven by the need to replenish the oxygen used to support

Accepted Answer

A) lactic acid fermentation. 
B) carbon dioxide synthesis in the lungs. 
C) oxidative phosphorylation in muscle cell mitochondria. 
D) the Calvin cycle of photosynthesis. 
A) lactic acid fermentation. 
B) carbon dioxide synthesis in the lungs. 
C) oxidative phosphorylation in muscle cell mitochondria. 
D) the Calvin cycle of photosynthesis.

Question 6

What best summarizes the events of the Calvin cycle?

Accepted Answer

A) The cycle uses ATP and NADPH to produce sugars. 
B) The cycle moves electrons from Photosystem II to Photosystem I. 
C) The cycle moves light-energized electrons to Photosystem II. 
D) The cycle absorbs light from the light reactions. 
A) The cycle uses ATP and NADPH to produce sugars. 
B) The cycle moves electrons from Photosystem II to Photosystem I. 
C) The cycle moves light-energized electrons to Photosystem II. 
D) The cycle absorbs light from the light reactions.

Question 7

The evolution of photosynthesis was an essential event for the evolution of life as we know it.Defend this statement by discussing the importance of the products of photosynthesis.

Accepted Answer

Photosynthesis produces oxygen,which all

Question 8

Carbon dioxide is one product of a metabolic process,which occurs in both plants and animals.This process is called

Accepted Answer

A) catalysis. 
B) glycolysis. 
C) respiration. 
D) photosynthesis. 
A) catalysis. 
B) glycolysis. 
C) respiration. 
D) photosynthesis.

Question 9

Plants and animals use different energy storage molecules,yet they both use the same mechanism to "burn" their stored energy.How can plants and animals both be successful,even though they "burn" different energy storage molecules?

Accepted Answer

A) The internal components of plant and animal cells are identical. 
B) The second law of thermodynamics says that all cells have the same energy transfer system. 
C) The breaking of the chemical bonds of a storage molecule transfers energy,no matter what molecule is stored. 
D) All organisms have the same enzymes to catalyze their energy-producing reactions. 
A) The internal components of plant and animal cells are identical. 
B) The second law of thermodynamics says that all cells have the same energy transfer system. 
C) The breaking of the chemical bonds of a storage molecule transfers energy,no matter what molecule is stored. 
D) All organisms have the same enzymes to catalyze their energy-producing reactions.

Question 10

Glycolysis is an anaerobic process,indicating that the glycolytic reactions

Accepted Answer

A) require no oxygen. 
B) produce molecular oxygen. 
C) produce ATP. 
D) produce citric acid. 
A) require no oxygen. 
B) produce molecular oxygen. 
C) produce ATP. 
D) produce citric acid.

Question 11

Two students are discussing the importance of glycolysis in human cells.One student states that the main function of glycolysis is to produce ATP.The other states that the main function is to produce NADH.Which student is correct?

Accepted Answer

The second student is correct.Although g

Question 12

A protein in the cell membrane is used to transport molecules against their concentration gradient (a process that requires energy).This protein likely also binds to ________ in addition to the molecule it is transporting.

Accepted Answer

The answer of A protein in the cell membrane is...

Question 13

Examine the illustration below.Which statement best summarizes the contribution of Photosystem I (PSI)during photosynthesis?

Accepted Answer

A) PSI provides the initial energy boost to the electrons on their way to Photosystem II (PSII). 
B) PSI generates the excited electrons that initially accumulate within the thylakoid space and eventually drive ATP synthesis. 
C) PSI generates the high-energy electrons that are transported by NADPH to the Calvin cycle and will eventually reduce the carbon in CO₂. 
D) PSI regulates the transmembrane passage of protons through the thylakoid membrane. 
A) PSI provides the initial energy boost to the electrons on their way to Photosystem II (PSII). 
B) PSI generates the excited electrons that initially accumulate within the thylakoid space and eventually drive ATP synthesis. 
C) PSI generates the high-energy electrons that are transported by NADPH to the Calvin cycle and will eventually reduce the carbon in CO₂. 
D) PSI regulates the transmembrane passage of protons through the thylakoid membrane.

Question 14

MATCHING
For each characteristic below, state if it applies to photosynthesis and/or cellular respiration.
-produces carbon dioxide

Accepted Answer

A) photosynthesis only 
B) cellular respiration only 
C) both photosynthesis and cellular respiration 
D) neither photosynthesis nor cellular respiration 
A) photosynthesis only 
B) cellular respiration only 
C) both photosynthesis and cellular respiration 
D) neither photosynthesis nor cellular respiration

Question 15

What would occur if the mitochondria of a cell did not produce an inner membrane?

Accepted Answer

A) The mitochondria would be unable to maintain the proton gradient required for ATP production. 
B) The mitochondria would be unable to capture ATP from the sun. 
C) The mitochondria would be unable to perform the Krebs cycle. 
D) The mitochondria would be unable to perform glycolysis. 
A) The mitochondria would be unable to maintain the proton gradient required for ATP production. 
B) The mitochondria would be unable to capture ATP from the sun. 
C) The mitochondria would be unable to perform the Krebs cycle. 
D) The mitochondria would be unable to perform glycolysis.

Question 16

The step of cellular respiration that produces a product that will eventually be used in the Calvin cycle is the ________.

Accepted Answer

The answer of The step of cellular respiration that produces...

Question 17

The sequential reaction pathway A → B → C → D is dependent on enzymes for each separate step.The enzyme which has "C" as a substrate becomes nonfunctional.Explain how this affects the metabolic pathway shown.

Accepted Answer

A will still be converted to B

Question 18

Which of these carries the most energy?

Accepted Answer

A) ADP 
B) ATP 
C) NADH 
D) NAD+ 
A) ADP 
B) ATP 
C) NADH 
D) NAD+

Question 19

The illustration below indicates that photosynthesis and cellular respiration are both complementary and balanced.An excess of sugars produced fossil fuels like coal and petroleum;this suggest that in the past,

Accepted Answer

A) the amount of photosynthesis occurring exceeded the amount of cellular respiration. 
B) sugars were only one of several products of photosynthesis. 
C) reduced carbon-rich molecules could be produced independently from the photosynthetic process. 
D) the energy release from respiration must have exceeded energy use in photosynthesis. 
A) the amount of photosynthesis occurring exceeded the amount of cellular respiration. 
B) sugars were only one of several products of photosynthesis. 
C) reduced carbon-rich molecules could be produced independently from the photosynthetic process. 
D) the energy release from respiration must have exceeded energy use in photosynthesis.

Question 20

What is the importance of photosynthesis to organisms other than plants?

Accepted Answer

A) All other organisms require carbon dioxide for life processes. 
B) The sugars made during photosynthesis are building blocks of DNA. 
C) All cells must have chloroplasts in order to survive. 
D) Photosynthesis captures energy that other organisms access when they eat either plants or organisms that eat plants. 
A) All other organisms require carbon dioxide for life processes. 
B) The sugars made during photosynthesis are building blocks of DNA. 
C) All cells must have chloroplasts in order to survive. 
D) Photosynthesis captures energy that other organisms access when they eat either plants or organisms that eat plants.

Some kinds of drain cleaners use enzymes rather than strong,more dangerous chemicals.These enzymes must be able to

Chemical reactions that break down lipids are

MATCHING For each characteristic below, state if it applies to photosynthesis and/or cellular respiration. -produces light energy

Humans store sugars in the form of glycogen.Glycogen is made by linking many glucose molecules together.This process is ________.

During exercise,the increase in respiration rate and heartbeat speed are driven by the need to replenish the oxygen used to support

What best summarizes the events of the Calvin cycle?

The evolution of photosynthesis was an essential event for the evolution of life as we know it.Defend this statement by discussing the importance of the products of photosynthesis.

Carbon dioxide is one product of a metabolic process,which occurs in both plants and animals.This process is called

Plants and animals use different energy storage molecules,yet they both use the same mechanism to "burn" their stored energy.How can plants and animals both be successful,even though they "burn" different energy storage molecules?

Glycolysis is an anaerobic process,indicating that the glycolytic reactions

Two students are discussing the importance of glycolysis in human cells.One student states that the main function of glycolysis is to produce ATP.The other states that the main function is to produce NADH.Which student is correct?

A protein in the cell membrane is used to transport molecules against their concentration gradient (a process that requires energy).This protein likely also binds to ________ in addition to the molecule it is transporting.

Examine the illustration below.Which statement best summarizes the contribution of Photosystem I (PSI)during photosynthesis?

MATCHING For each characteristic below, state if it applies to photosynthesis and/or cellular respiration. -produces carbon dioxide

What would occur if the mitochondria of a cell did not produce an inner membrane?

The step of cellular respiration that produces a product that will eventually be used in the Calvin cycle is the ________.

The sequential reaction pathway A → B → C → D is dependent on enzymes for each separate step.The enzyme which has "C" as a substrate becomes nonfunctional.Explain how this affects the metabolic pathway shown.

Which of these carries the most energy?

The illustration below indicates that photosynthesis and cellular respiration are both complementary and balanced.An excess of sugars produced fossil fuels like coal and petroleum;this suggest that in the past,

What is the importance of photosynthesis to organisms other than plants?

The Nature of Science

Chemistry of Life

Life Is Cellular

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

Applying the Science

Filters

Exam 4: How Cells Work

Some kinds of drain cleaners use enzymes rather than strong,more dangerous chemicals.These enzymes must be able to

Chemical reactions that break down lipids are

MATCHING For each characteristic below, state if it applies to photosynthesis and/or cellular respiration. -produces light energy

Humans store sugars in the form of glycogen.Glycogen is made by linking many glucose molecules together.This process is ________.

During exercise,the increase in respiration rate and heartbeat speed are driven by the need to replenish the oxygen used to support

What best summarizes the events of the Calvin cycle?

The evolution of photosynthesis was an essential event for the evolution of life as we know it.Defend this statement by discussing the importance of the products of photosynthesis.

Carbon dioxide is one product of a metabolic process,which occurs in both plants and animals.This process is called

Plants and animals use different energy storage molecules,yet they both use the same mechanism to "burn" their stored energy.How can plants and animals both be successful,even though they "burn" different energy storage molecules?

Glycolysis is an anaerobic process,indicating that the glycolytic reactions

Two students are discussing the importance of glycolysis in human cells.One student states that the main function of glycolysis is to produce ATP.The other states that the main function is to produce NADH.Which student is correct?

A protein in the cell membrane is used to transport molecules against their concentration gradient (a process that requires energy).This protein likely also binds to ________ in addition to the molecule it is transporting.

Examine the illustration below.Which statement best summarizes the contribution of Photosystem I (PSI)during photosynthesis?

MATCHING For each characteristic below, state if it applies to photosynthesis and/or cellular respiration. -produces carbon dioxide

What would occur if the mitochondria of a cell did not produce an inner membrane?

The step of cellular respiration that produces a product that will eventually be used in the Calvin cycle is the ________.

The sequential reaction pathway A → B → C → D is dependent on enzymes for each separate step.The enzyme which has "C" as a substrate becomes nonfunctional.Explain how this affects the metabolic pathway shown.

Which of these carries the most energy?

The illustration below indicates that photosynthesis and cellular respiration are both complementary and balanced.An excess of sugars produced fossil fuels like coal and petroleum;this suggest that in the past,

What is the importance of photosynthesis to organisms other than plants?

The Nature of Science

Chemistry of Life

Life Is Cellular

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

Applying the Science

Filters