Question 1

Organisms consist mostly of four elements. They are carbon, hydrogen, oxygen, and

Accepted Answer

A)  iron. 
B)  chlorine. 
C)  silicon. 
D)  nitrogen. 
E)  phosphorous. 
A)  iron. 
B)  chlorine. 
C)  silicon. 
D)  nitrogen. 
E)  phosphorous.

Question 2

In addition to hydrogen bonding, what type of bonds may exist in the quaternary structure of a protein?

Accepted Answer

A)  ionic 
B)  coordinate 
C)  disulfide 
D)  network 
E)  diphosphate 
A)  ionic 
B)  coordinate 
C)  disulfide 
D)  network 
E)  diphosphate

Question 3

Which structure makes a protein a molecule that can perform a particular function?

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  isomeric 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  isomeric

Question 4

When an atom's outer shell is filled it is

Accepted Answer

A)  unstable. 
B)  an ion. 
C)  most stable. 
D)  polarized. 
E)  negatively charged. 
A)  unstable. 
B)  an ion. 
C)  most stable. 
D)  polarized. 
E)  negatively charged.

Question 5

What is the name for a molecule that accepts hydrogen atoms and electrons that are being removed from other molecules and transfers them to other sites for further use?

Accepted Answer

A)  enzyme 
B)  coenzyme 
C)  protein 
D)  lipid 
E)  steroid 
A)  enzyme 
B)  coenzyme 
C)  protein 
D)  lipid 
E)  steroid

Question 6

Which two subatomic particles are almost always equal in number?

Accepted Answer

A)  electrons and neutrons 
B)  protons and neutrons 
C)  protons and electrons 
D)  photons and electrons 
E)  neutrons and neutrinos 
A)  electrons and neutrons 
B)  protons and neutrons 
C)  protons and electrons 
D)  photons and electrons 
E)  neutrons and neutrinos

Question 7

Cellular pH is kept near a value of 7 because of

Accepted Answer

A)  salts. 
B)  buffers. 
C)  acids. 
D)  bases. 
E)  water. 
A)  salts. 
B)  buffers. 
C)  acids. 
D)  bases. 
E)  water.

Question 8

Which element does not contain a neutron in its nucleus?

Accepted Answer

A)  helium 
B)  carbon 
C)  oxygen 
D)  hydrogen 
E)  nitrogen 
A)  helium 
B)  carbon 
C)  oxygen 
D)  hydrogen 
E)  nitrogen

Question 9

Selecting the Exception Four of the five answers listed below are related by a unifying characteristic. Select the exception.

Accepted Answer

A)  ionic bond 
B)  covalent bond 
C)  polar bond 
D)  hydrogen bond 
E)  cluster of nonpolar groups 
A)  ionic bond 
B)  covalent bond 
C)  polar bond 
D)  hydrogen bond 
E)  cluster of nonpolar groups

Question 10

The process in which an atom or molecule loses one or more electrons to another atom or molecule is called

Accepted Answer

A)  reduction. 
B)  dehydration. 
C)  oxidation. 
D)  condensation. 
E)  hydrolysis. 
A)  reduction. 
B)  dehydration. 
C)  oxidation. 
D)  condensation. 
E)  hydrolysis.

Question 11

Selecting the Exception Four of the five answers listed below are carbohydrates. Select the exception.

Accepted Answer

A)  glycerol 
B)  cellulose 
C)  starch 
D)  sucrose 
E)  glycogen 
A)  glycerol 
B)  cellulose 
C)  starch 
D)  sucrose 
E)  glycogen

Question 12

Some pesticides can trigger

Accepted Answer

A)  hives. 
B)  joint pain. 
C)  headaches. 
D)  asthma. 
E)  all of these. 
A)  hives. 
B)  joint pain. 
C)  headaches. 
D)  asthma. 
E)  all of these.

Question 13

A buffer system

Accepted Answer

A)  makes new hydrogen ions. 
B)  eliminates hydrogen ions already present. 
C)  binds carbon ions. 
D)  releases hydrogen ions. 
E)  produce excess acid. 
A)  makes new hydrogen ions. 
B)  eliminates hydrogen ions already present. 
C)  binds carbon ions. 
D)  releases hydrogen ions. 
E)  produce excess acid.

Question 14

Why does water have a high heat capacity?

Accepted Answer

A)  because it has covalent bonds 
B)  because it has ionic bonds 
C)  because it has hydrogen bonds 
D)  because it has a high boiling point 
E)  because it has a low freezing point 
A)  because it has covalent bonds 
B)  because it has ionic bonds 
C)  because it has hydrogen bonds 
D)  because it has a high boiling point 
E)  because it has a low freezing point

Question 15

A lipid is a

Accepted Answer

A)  polar hydrocarbon. 
B)  polar peptide. 
C)  nonpolar hydrocarbon. 
D)  nonpolar peptide. 
E)  coordinate covalent molecule. 
A)  polar hydrocarbon. 
B)  polar peptide. 
C)  nonpolar hydrocarbon. 
D)  nonpolar peptide. 
E)  coordinate covalent molecule.

Question 16

Which vitamin is derived from sugar monomers?

Accepted Answer

A)  vitamin D 
B)  vitamin E 
C)  vitamin C 
D)  vitamin A 
E)  vitamin B12 
A)  vitamin D 
B)  vitamin E 
C)  vitamin C 
D)  vitamin A 
E)  vitamin B12

Question 17

Which subatomic particle has a positive charge?

Accepted Answer

A)  electron 
B)  neutron 
C)  photon 
D)  neutrino 
E)  proton 
A)  electron 
B)  neutron 
C)  photon 
D)  neutrino 
E)  proton

Question 18

Selecting the Exception Four of the five answers listed below are saturated fats. Select the exception.

Accepted Answer

A)  butter 
B)  bacon 
C)  margarine 
D)  animal fat 
E)  lard 
A)  butter 
B)  bacon 
C)  margarine 
D)  animal fat 
E)  lard

Question 19

Which sterol, often associated with heart disease, is a crucial component to the structure and function of cells?

Accepted Answer

A)  cholesterol 
B)  triglycerides 
C)  phospholipids 
D)  cortisol 
E)  estrogen 
A)  cholesterol 
B)  triglycerides 
C)  phospholipids 
D)  cortisol 
E)  estrogen

Question 20

Antioxidant-rich foods are typically

Accepted Answer

A)  low in fat and high in fiber. 
B)  high in fat and low in fiber. 
C)  high in sugars and low in fat. 
D)  high in fiber and high in fat. 
E)  low in sugars and high in fiber. 
A)  low in fat and high in fiber. 
B)  high in fat and low in fiber. 
C)  high in sugars and low in fat. 
D)  high in fiber and high in fat. 
E)  low in sugars and high in fiber.

Exam 2: Chemistry of Life

Organisms consist mostly of four elements. They are carbon, hydrogen, oxygen, and

In addition to hydrogen bonding, what type of bonds may exist in the quaternary structure of a protein?

Which structure makes a protein a molecule that can perform a particular function?

When an atom's outer shell is filled it is

What is the name for a molecule that accepts hydrogen atoms and electrons that are being removed from other molecules and transfers them to other sites for further use?

Which two subatomic particles are almost always equal in number?

Cellular pH is kept near a value of 7 because of

Which element does not contain a neutron in its nucleus?

Selecting the Exception Four of the five answers listed below are related by a unifying characteristic. Select the exception.

The process in which an atom or molecule loses one or more electrons to another atom or molecule is called

Selecting the Exception Four of the five answers listed below are carbohydrates. Select the exception.

Some pesticides can trigger

A buffer system

Why does water have a high heat capacity?

A lipid is a

Which vitamin is derived from sugar monomers?

Which subatomic particle has a positive charge?

Selecting the Exception Four of the five answers listed below are saturated fats. Select the exception.

Which sterol, often associated with heart disease, is a crucial component to the structure and function of cells?

Antioxidant-rich foods are typically

Learning About Human Biology

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

Chromosomes and Human Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Evolution

Principles of Ecology

Human Impacts on the Biosphere

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