Question 1

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

Accepted Answer

Krebs cycl

Question 2

Which of the following molecules carries electrons to the electron transport chain of oxidative phosphorylation?

Accepted Answer

A)  ATP 
B)  NADH 
C)  CO₂ 
D)  ADP 
A)  ATP 
B)  NADH 
C)  CO₂ 
D)  ADP

Question 3

The Krebs cycle produces

Accepted Answer

A)  NADH, ATP, and FADH₂. 
B)  water and carbon dioxide. 
C)  ADP and NADP⁺. 
D)  acetyl CoA and sugars. 
A)  NADH, ATP, and FADH₂. 
B)  water and carbon dioxide. 
C)  ADP and NADP⁺. 
D)  acetyl CoA and sugars.

Question 4

During exercise,the increase in respiration rate and heart rate 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 5

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

Accepted Answer

Photosynthesis produces oxygen,which all

Question 6

Which of the following is either consumed or synthesized in virtually every cellular reaction?

Accepted Answer

A)  sugars 
B)  enzymes 
C)  DNA 
D)  ATP 
A)  sugars 
B)  enzymes 
C)  DNA 
D)  ATP

Question 7

For each characteristic below,determine if it applies to the light reactions or the light-independent reactions of photosynthesis.
-uses energy carriers

Accepted Answer

A)  light reactions 
B)  light-independent reactions 
A)  light reactions 
B)  light-independent reactions

Question 8

The image below diagrams the action of an enzyme.Notice that the enzyme is depicted as being more tightly wrapped around the substrates in step 2 than it is in step 1.Why is this?

Accepted Answer

A)  When a substrate locks into the active site of an enzyme, the enzyme changes shape to mold itself around the substrates. 
B)  Generally, the size of a substrate is larger than the size of the active site into which it must fit. When the substrate enters the active site, the active site must stretch to fit. 
C)  Before catalysis can occur, a substrate must change its shape so that it fits into the active site of the enzyme more precisely. 
D)  Most active sites are only designed to hold one substrate. In this image, two substrates enter the active site, creating a tighter fit. 
A)  When a substrate locks into the active site of an enzyme, the enzyme changes shape to mold itself around the substrates. 
B)  Generally, the size of a substrate is larger than the size of the active site into which it must fit. When the substrate enters the active site, the active site must stretch to fit. 
C)  Before catalysis can occur, a substrate must change its shape so that it fits into the active site of the enzyme more precisely. 
D)  Most active sites are only designed to hold one substrate. In this image, two substrates enter the active site, creating a tighter fit.

Question 9

The chemical 3-(3,4-dichloro-phenyl)-1,1-dimethylurea (DCMU)blocks the movement of electrons at the point indicated by the black,downward-pointing arrow in the figure below.Which of the following would be an immediate effect of treating a chloroplast with this drug?

Accepted Answer

A)  Water molecules would be split at a faster rate. 
B)  The amount of NADPH produced by the light reactions would increase. 
C)  A proton gradient would not be created, so ATP could not be made. 
D)  The production of water would increase. 
A)  Water molecules would be split at a faster rate. 
B)  The amount of NADPH produced by the light reactions would increase. 
C)  A proton gradient would not be created, so ATP could not be made. 
D)  The production of water would increase.

Question 10

For each characteristic below,determine if it applies to the light reactions or the light-independent reactions of photosynthesis.
-uses water

Accepted Answer

A)  light reactions 
B)  light-independent reactions 
A)  light reactions 
B)  light-independent reactions

Question 11

Is the burning of wood most representative of anabolism or catabolism? Defend your answer.

Accepted Answer

Burning wood releases energy a

Question 12

Which of the following is a similarity between photosynthesis and respiration?

Accepted Answer

A)  Neither is a metabolic process. 
B)  They are both metabolic processes. 
C)  Neither is an anabolic process. 
D)  They are both mainly anabolic processes. 
A)  Neither is a metabolic process. 
B)  They are both metabolic processes. 
C)  Neither is an anabolic process. 
D)  They are both mainly anabolic processes.

Question 13

In a human cell,

Accepted Answer

A)  one enzyme usually catalyzes more than five different chemical reactions. 
B)  nearly all chemical reactions are catalyzed by enzymes. 
C)  enzymes must be constantly replaced as they are used up in the reactions that they catalyze. 
D)  some enzymes are specialized to store energy in the form of electrons. 
A)  one enzyme usually catalyzes more than five different chemical reactions. 
B)  nearly all chemical reactions are catalyzed by enzymes. 
C)  enzymes must be constantly replaced as they are used up in the reactions that they catalyze. 
D)  some enzymes are specialized to store energy in the form of electrons.

Question 14

Photosynthetic organisms capture energy from sunlight and convert it into chemical bonds by forming

Accepted Answer

A)  sugars. 
B)  enzymes. 
C)  work. 
D)  substrates. 
A)  sugars. 
B)  enzymes. 
C)  work. 
D)  substrates.

Question 15

The first law of thermodynamics states that

Accepted Answer

A)  metabolic reactions must be balanced. 
B)  the flow of energy connects living things to their environments. 
C)  energy cannot be created nor destroyed. 
D)  systems tend to become more disorderly. 
A)  metabolic reactions must be balanced. 
B)  the flow of energy connects living things to their environments. 
C)  energy cannot be created nor destroyed. 
D)  systems tend to become more disorderly.

Question 16

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 17

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 18

For each characteristic below,determine 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

Question 19

Excess carbon dioxide in the atmosphere is increasing climate change.How do photosynthesis and cellular respiration relate to this issue,and how can we use this knowledge to help decrease this problem?

Accepted Answer

Photosynthesis takes in carbon

Question 20

For each characteristic below,determine if it applies to the light reactions or the light-independent reactions of photosynthesis.
-produces oxygen gas

Accepted Answer

A)  light reactions 
B)  light-independent reactions 
A)  light reactions 
B)  light-independent reactions

Exam 5: How Cells Work

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

Which of the following molecules carries electrons to the electron transport chain of oxidative phosphorylation?

The Krebs cycle produces

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

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

Which of the following is either consumed or synthesized in virtually every cellular reaction?

For each characteristic below,determine if it applies to the light reactions or the light-independent reactions of photosynthesis. -uses energy carriers

The image below diagrams the action of an enzyme.Notice that the enzyme is depicted as being more tightly wrapped around the substrates in step 2 than it is in step 1.Why is this?

The chemical 3-(3,4-dichloro-phenyl)-1,1-dimethylurea (DCMU)blocks the movement of electrons at the point indicated by the black,downward-pointing arrow in the figure below.Which of the following would be an immediate effect of treating a chloroplast with this drug?

For each characteristic below,determine if it applies to the light reactions or the light-independent reactions of photosynthesis. -uses water

Is the burning of wood most representative of anabolism or catabolism? Defend your answer.

Which of the following is a similarity between photosynthesis and respiration?

In a human cell,

Photosynthetic organisms capture energy from sunlight and convert it into chemical bonds by forming

The first law of thermodynamics states that

Glycolysis is an anaerobic process,indicating that the glycolytic reactions

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

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

Excess carbon dioxide in the atmosphere is increasing climate change.How do photosynthesis and cellular respiration relate to this issue,and how can we use this knowledge to help decrease this problem?

For each characteristic below,determine if it applies to the light reactions or the light-independent reactions of photosynthesis. -produces oxygen gas

The Nature of Science

Evaluating Scientific Claims

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

Bacteria and Archaea

Plants, Fungi, and Protists

Animals and Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

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