Question 1

During photosynthesis, light energy is converted into chemical energy, a type of

Accepted Answer

A)  potential energy. 
B)  kinetic energy. 
C)  heat. 
D)  metabolism. 
A)  potential energy. 
B)  kinetic energy. 
C)  heat. 
D)  metabolism.

Question 2

When ATP breaks into ADP and a phosphate group, energy is given off.

Accepted Answer

A) True 
 B)False

Question 3

As a molecule becomes more oxidized, it loses electrons.

Accepted Answer

A) True 
 B)False

Question 4

In the reaction CH₂O + O₂ → CO₂ + H₂O,

Accepted Answer

A)  carbon is reduced and hydrogen is oxidized. 
B)  carbon is oxidized and oxygen is reduced. 
C)  carbon and hydrogen are reduced. 
D)  carbon and oxygen are oxidized. 
A)  carbon is reduced and hydrogen is oxidized. 
B)  carbon is oxidized and oxygen is reduced. 
C)  carbon and hydrogen are reduced. 
D)  carbon and oxygen are oxidized.

Question 5

In many organelles, groups of different enzymes are located on membranes in close proximity to each other because

Accepted Answer

A)  attaching enzymes to the membrane prevents the cell from losing them to the surrounding environment. 
B)  when enzymes are in close proximity, each one can catalyze more than one type of reaction. 
C)  these enzymes are involved in the same metabolic pathway and keeping them closer together increases the efficiency of the pathway. 
D)  all enzymes must act in groups to sufficiently reduce the amount of activation energy required for a reaction to occur. 
A)  attaching enzymes to the membrane prevents the cell from losing them to the surrounding environment. 
B)  when enzymes are in close proximity, each one can catalyze more than one type of reaction. 
C)  these enzymes are involved in the same metabolic pathway and keeping them closer together increases the efficiency of the pathway. 
D)  all enzymes must act in groups to sufficiently reduce the amount of activation energy required for a reaction to occur.

Question 6

A molecule of sugar slowly "burns" in one of your cells. The products of these catabolic reactions are ___________ than the original sugar molecules.

Accepted Answer

A)  less stable and have more energy 
B)  more stable and have more energy 
C)  more stable and have less energy 
D)  less stable and have less energy 
A)  less stable and have more energy 
B)  more stable and have more energy 
C)  more stable and have less energy 
D)  less stable and have less energy

Question 7

What do catalysts and enzymes have in common?

Accepted Answer

A)  They decrease the number of collisions between substrate molecules. 
B)  They increase the amount of activation energy required. 
C)  They increase the amount of substrate that is available. 
D)  They decrease the amount of activation energy required. 
A)  They decrease the number of collisions between substrate molecules. 
B)  They increase the amount of activation energy required. 
C)  They increase the amount of substrate that is available. 
D)  They decrease the amount of activation energy required.

Question 8

Heat speeds up chemical reactions by

Accepted Answer

A)  causing the cell to produce enzymes that lower the activation energy of the reactions. 
B)  decreasing the amount of oxygen available for redox reactions. 
C)  inhibiting catabolic reactions while promoting anabolic reactions. 
D)  causing substrate molecules to collide more often. 
A)  causing the cell to produce enzymes that lower the activation energy of the reactions. 
B)  decreasing the amount of oxygen available for redox reactions. 
C)  inhibiting catabolic reactions while promoting anabolic reactions. 
D)  causing substrate molecules to collide more often.

Question 9

_______ blocks the activity of both COX-1 and COX-2 enzymes.

Accepted Answer

The answer of _______ blocks the activity of both COX-1...

Question 10

The chemical reactions that occur in cells are catalyzed by _______ .

Accepted Answer

The answer of The chemical reactions that occur in cells...

Question 11

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

Accepted Answer

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

Question 12

Sugar molecules are more oxidized than carbon dioxide molecules.

Accepted Answer

A) True 
 B)False

Question 13

A molecule of methane burns, producing carbon dioxide, heat, light, and water. The direction of the event is dictated by the __________ law of thermodynamics.

Accepted Answer

The answer of A molecule of methane burns, producing carbon...

Question 14

Enzymes are a special class of

Accepted Answer

A)  proteins. 
B)  nucleotides. 
C)  chemical bonds. 
D)  hormones. 
A)  proteins. 
B)  nucleotides. 
C)  chemical bonds. 
D)  hormones.

Question 15

The first law of thermodynamics states that the total energy of a system and its surroundings remains constant.

Accepted Answer

A) True 
 B)False

Question 16

Organisms that maintain a constant body temperature rely on the heat produced by cells. Where does this heat come from?

Accepted Answer

A)  Special metabolic pathways exist just for the production of heat. 
B)  Mitochondria produce heat in the form of ATP. 
C)  Plants store up heat as they perform photosynthesis. When an organism digests a plant, that heat is released. 
D)  Heat is a natural by-product of most chemical reactions. 
A)  Special metabolic pathways exist just for the production of heat. 
B)  Mitochondria produce heat in the form of ATP. 
C)  Plants store up heat as they perform photosynthesis. When an organism digests a plant, that heat is released. 
D)  Heat is a natural by-product of most chemical reactions.

Question 17

The metabolism of living organisms is made up of a series of reactions. These reactions are carefully controlled so that the organism

Accepted Answer

A)  releases less carbon dioxide into the atmosphere. 
B)  has time to react to its environment. 
C)  doesn't use up its food source too quickly. 
D)  can capture as much of the released energy as possible. 
A)  releases less carbon dioxide into the atmosphere. 
B)  has time to react to its environment. 
C)  doesn't use up its food source too quickly. 
D)  can capture as much of the released energy as possible.

Question 18

Which of the following compounds is the least oxidized?

Accepted Answer

A)  C₆H₁₁O₆ 
B)  CO₂ 
C)  CH₄ 
D)  HCOOH 
A)  C₆H₁₁O₆ 
B)  CO₂ 
C)  CH₄ 
D)  HCOOH

Question 19

The shape of an enzyme does not affect its activity.

Accepted Answer

A) True 
 B)False

Question 20

Enzymes can make otherwise impossible reactions happen.

Accepted Answer

A) True 
 B)False

Exam 7: Energy and Enzymes

During photosynthesis, light energy is converted into chemical energy, a type of

When ATP breaks into ADP and a phosphate group, energy is given off.

As a molecule becomes more oxidized, it loses electrons.

In the reaction CH₂O + O₂ → CO₂ + H₂O,

In many organelles, groups of different enzymes are located on membranes in close proximity to each other because

A molecule of sugar slowly "burns" in one of your cells. The products of these catabolic reactions are ___________ than the original sugar molecules.

What do catalysts and enzymes have in common?

Heat speeds up chemical reactions by

_______ blocks the activity of both COX-1 and COX-2 enzymes.

The chemical reactions that occur in cells are catalyzed by _______ .

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

Sugar molecules are more oxidized than carbon dioxide molecules.

A molecule of methane burns, producing carbon dioxide, heat, light, and water. The direction of the event is dictated by the __________ law of thermodynamics.

Enzymes are a special class of

The first law of thermodynamics states that the total energy of a system and its surroundings remains constant.

Organisms that maintain a constant body temperature rely on the heat produced by cells. Where does this heat come from?

The metabolism of living organisms is made up of a series of reactions. These reactions are carefully controlled so that the organism

Which of the following compounds is the least oxidized?

The shape of an enzyme does not affect its activity.

Enzymes can make otherwise impossible reactions happen.

The Nature of Science and the Characteristics of Life

Organizing the Diversity of Life

Major Groups of Living Organisms

Chemical Building Blocks

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Photosynthesis and Cellular Respiration

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

DNA

From Gene to Protein

Control of Gene Expression

DNA Technology

How Evolution Works

Evolution of Populations

Adaptation and Speciation

The Evolutionary History of Life

Maintaining the Internal Environment

Animal Nutrition and Digestion

Gas Exchange

The Circulatory System

Animal Hormones

The Nervous System

Sensing the Environment

Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

The Biosphere

Growth of Populations

Interactions among Organisms

Communities of Organisms

Ecosystems

Global Change

Biodiversity and People

Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

Feeding a Hungry Planet

Building a Sustainable Society

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