Question 1

Which element makes up more than half of the human body?

Accepted Answer

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

Question 2

An element that represents less than 0.01 percent of body weight is known as a(n)

Accepted Answer

A)  compound. 
B)  trace element. 
C)  molecule. 
D)  isotope. 
E)  analog. 
A)  compound. 
B)  trace element. 
C)  molecule. 
D)  isotope. 
E)  analog.

Question 3

The sequence of amino acids is the ____ structure of a protein.

Accepted Answer

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

Question 4

The three most common atoms in your body are

Accepted Answer

A)  hydrogen, oxygen, and carbon. 
B)  carbon, hydrogen, and nitrogen. 
C)  carbon, nitrogen, and oxygen. 
D)  nitrogen, hydrogen, and oxygen. 
E)  carbon, oxygen, and sulfur. 
A)  hydrogen, oxygen, and carbon. 
B)  carbon, hydrogen, and nitrogen. 
C)  carbon, nitrogen, and oxygen. 
D)  nitrogen, hydrogen, and oxygen. 
E)  carbon, oxygen, and sulfur.

Question 5

Selecting the Exception Four of the five answers listed below are alkaline (pH above 7). Select the exception.

Accepted Answer

A)  milk of magnesia 
B)  household ammonia 
C)  Tums Ò 
D)  phosphate detergent 
E)  cola soft drink 
A)  milk of magnesia 
B)  household ammonia 
C)  Tums Ò 
D)  phosphate detergent 
E)  cola soft drink

Question 6

Proteins that speed up reactions are known as

Accepted Answer

A)  salts. 
B)  buffers. 
C)  monomers. 
D)  polymers. 
E)  enzymes. 
A)  salts. 
B)  buffers. 
C)  monomers. 
D)  polymers. 
E)  enzymes.

Question 7

Match between columns
                        Premises: antioxidant
glucose
enzyme
phospholipids

Accepted Answer

The Answer of principal components of cell membranes and a is...

Question 8

The neutral subatomic particle is (are) the

Accepted Answer

A)  neutron. 
B)  proton. 
C)  electron. 
D)  neutron and proton. 
E)  proton and electron. 
A)  neutron. 
B)  proton. 
C)  electron. 
D)  neutron and proton. 
E)  proton and electron.

Question 9

Match between columns
                        Premises: The "building block" unit of a polypeptide chain.
a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids
The basic unit of cellulose.
a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids
The basic unit of DNA.
a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids
The basic unit of glycogen.
a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids
The basic unit of messenger RNA.
a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids
The basic unit of proteins.

a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids
The basic unit of starch.
a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids
Which two units combine in various ways to form lipids?
a- amino acids
b- glucose
c- glycerol
d- fatty acids
e- nucleotides
f- amino acids and glucose
g- amino acids and glycerol
h- glucose and glycerol
i- glucose and fatty acids
j- glycerol and fatty acids

Accepted Answer

The Answer of choice A. and choice E. and choice is...

Question 10

If a molecule contains carbon and at least one atom of hydrogen, it is referred to as being

Accepted Answer

A)  inorganic. 
B)  acidic. 
C)  basic. 
D)  organic. 
E)  crystalline. 
A)  inorganic. 
B)  acidic. 
C)  basic. 
D)  organic. 
E)  crystalline.

Question 11

Which type of fat, often the main ingredient in margarine, has been implicated in the development of certain heart diseases?

Accepted Answer

A)  triglycerides 
B)  trans fatty acids 
C)  cholesterol 
D)  oils 
E)  waxes 
A)  triglycerides 
B)  trans fatty acids 
C)  cholesterol 
D)  oils 
E)  waxes

Question 12

Electrons move around the atomic nucleus in

Accepted Answer

A)  zigzag patterns. 
B)  straight paths. 
C)  shells. 
D)  two dimensions. 
E)  one dimension. 
A)  zigzag patterns. 
B)  straight paths. 
C)  shells. 
D)  two dimensions. 
E)  one dimension.

Question 13

Which of the following answers include all the others?

Accepted Answer

A)  atoms 
B)  molecules 
C)  electrons 
D)  elements 
E)  protons 
A)  atoms 
B)  molecules 
C)  electrons 
D)  elements 
E)  protons

Question 14

Which molecule links chemical reactions that release energy with other reactions that require energy?

Accepted Answer

A)  DNA 
B)  RNA 
C)  NAD 
D)  ATP 
E)  cyclic AMP 
A)  DNA 
B)  RNA 
C)  NAD 
D)  ATP 
E)  cyclic AMP

Question 15

HCl in the stomach acts to

Accepted Answer

A)  neutralize buffers. 
B)  kill harmful bacteria. 
C)  switch off certain digestive enzymes. 
D)  produce trypsin. 
E)  prevent breakdown of protein. 
A)  neutralize buffers. 
B)  kill harmful bacteria. 
C)  switch off certain digestive enzymes. 
D)  produce trypsin. 
E)  prevent breakdown of protein.

Question 16

The most plentiful sugar in nature is

Accepted Answer

A)  glucose. 
B)  fructose. 
C)  sucrose. 
D)  lactose. 
E)  glycogen. 
A)  glucose. 
B)  fructose. 
C)  sucrose. 
D)  lactose. 
E)  glycogen.

Question 17

What substances will release hydrogen ions when their concentration is low and accept them when their concentration is high?

Accepted Answer

A)  salts 
B)  acids 
C)  bases 
D)  buffers 
E)  alkalines 
A)  salts 
B)  acids 
C)  bases 
D)  buffers 
E)  alkalines

Question 18

An atom that is considered inert is

Accepted Answer

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

Question 19

Electrons inside a shell travel in

Accepted Answer

A)  straight paths. 
B)  orbitals 
C)  zigzag patterns 
D)  two dimensions 
E)  one dimension 
A)  straight paths. 
B)  orbitals 
C)  zigzag patterns 
D)  two dimensions 
E)  one dimension

Question 20

The element in the body with the greatest number of atoms is

Accepted Answer

A)  phosphorus. 
B)  oxygen. 
C)  hydrogen. 
D)  calcium. 
E)  carbon. 
A)  phosphorus. 
B)  oxygen. 
C)  hydrogen. 
D)  calcium. 
E)  carbon.

Exam 2: Chemistry of Life

Which element makes up more than half of the human body?

An element that represents less than 0.01 percent of body weight is known as a(n)

The sequence of amino acids is the ____ structure of a protein.

The three most common atoms in your body are

Selecting the Exception Four of the five answers listed below are alkaline (pH above 7). Select the exception.

Proteins that speed up reactions are known as

The neutral subatomic particle is (are) the

If a molecule contains carbon and at least one atom of hydrogen, it is referred to as being

Which type of fat, often the main ingredient in margarine, has been implicated in the development of certain heart diseases?

Electrons move around the atomic nucleus in

Which of the following answers include all the others?

Which molecule links chemical reactions that release energy with other reactions that require energy?

HCl in the stomach acts to

The most plentiful sugar in nature is

What substances will release hydrogen ions when their concentration is low and accept them when their concentration is high?

An atom that is considered inert is

Electrons inside a shell travel in

The element in the body with the greatest number of atoms is

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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