Question 1

Which polysaccharide is consumed as a source of fiber?

Accepted Answer

A)  cellulose 
B)  glycogen 
C)  glucose 
D)  chitin 
E)  starch 
A)  cellulose 
B)  glycogen 
C)  glucose 
D)  chitin 
E)  starch

Question 2

The presence of a buffer in our blood helps maintain homeostasis.

Accepted Answer

A) True 
 B)False

Question 3

The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

Accepted Answer

A) True 
 B)False

Question 4

The sides of the DNA ladder (backbone)are

Accepted Answer

A)  alternating carbons and nitrogens. 
B)  the R groups. 
C)  the nitrogenous bases. 
D)  alternating nitrogens and phosphates. 
E)  sugars and phosphates. 
A)  alternating carbons and nitrogens. 
B)  the R groups. 
C)  the nitrogenous bases. 
D)  alternating nitrogens and phosphates. 
E)  sugars and phosphates.

Question 5

The reason water is polar is because

Accepted Answer

A)  in polar molecules atoms share electrons evenly. 
B)  the electrons spend more time circling the oxygen atom than the hydrogens. 
C)  hydrophilic molecules interact with water. 
D)  hydrophobic molecules do not interact with water. 
E)  there is a transfer of electrons from the hydrogen to the oxygen. 
A)  in polar molecules atoms share electrons evenly. 
B)  the electrons spend more time circling the oxygen atom than the hydrogens. 
C)  hydrophilic molecules interact with water. 
D)  hydrophobic molecules do not interact with water. 
E)  there is a transfer of electrons from the hydrogen to the oxygen.

Question 6

Radiation can have both positive and negative impact on humans.

Accepted Answer

A) True 
 B)False

Question 7

On a warm day in April,Tina jumped into the swimming pool.To her surprise the water was really cold.Which property of water did she discover?

Accepted Answer

A)  Water molecules are cohesive. 
B)  The temperature of liquid water rises and falls slowly. 
C)  Water possesses hydrogen bonds. 
D)  Water is a polar molecule. 
E)  Frozen water is less dense than liquid water. 
A)  Water molecules are cohesive. 
B)  The temperature of liquid water rises and falls slowly. 
C)  Water possesses hydrogen bonds. 
D)  Water is a polar molecule. 
E)  Frozen water is less dense than liquid water.

Question 8

When two amino acids combine via a dehydration reaction,

Accepted Answer

A)  a peptide bond is formed. 
B)  the R groups are lost. 
C)  water is added to begin the reaction. 
D)  the carboxyl group of each join together. 
E)  the amino group of each join together. 
A)  a peptide bond is formed. 
B)  the R groups are lost. 
C)  water is added to begin the reaction. 
D)  the carboxyl group of each join together. 
E)  the amino group of each join together.

Question 9

A solution containing 0.00001 moles of H+ has a pH of

Accepted Answer

A)  3. 
B)  5. 
C)  7. 
D)  9. 
E)  11. 
A)  3. 
B)  5. 
C)  7. 
D)  9. 
E)  11.

Question 10

What makes each amino acid unique?

Accepted Answer

A)  the central carbon 
B)  the R group 
C)  the amino group 
D)  the carboxyl group 
E)  the carbon ring 
A)  the central carbon 
B)  the R group 
C)  the amino group 
D)  the carboxyl group 
E)  the carbon ring

Question 11

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

Accepted Answer

A)  4 
B)  5 
C)  9 
D)  13 
E)  7 
A)  4 
B)  5 
C)  9 
D)  13 
E)  7

Question 12

Atoms that share electrons have what type of bonds?

Accepted Answer

A)  covalent 
B)  neutral 
C)  hydrogen 
D)  colloidal 
E)  ionic 
A)  covalent 
B)  neutral 
C)  hydrogen 
D)  colloidal 
E)  ionic

Question 13

CaCl2 is a salt that forms as the result of what type of bond?

Accepted Answer

A)  covalent 
B)  hydrogen 
C)  polar 
D)  nonpolar 
E)  ionic 
A)  covalent 
B)  hydrogen 
C)  polar 
D)  nonpolar 
E)  ionic

Question 14

How many elements occur naturally?

Accepted Answer

A)  112 
B)  92 
C)  64 
D)  32 
E)  6 
A)  112 
B)  92 
C)  64 
D)  32 
E)  6

Question 15

The sex hormones belong to which category of lipids?

Accepted Answer

A)  steroids 
B)  fats 
C)  oils 
D)  triglycerides 
E)  phospholipids 
A)  steroids 
B)  fats 
C)  oils 
D)  triglycerides 
E)  phospholipids

Question 16

Which of the following is not a monosaccharide?

Accepted Answer

A)  glucose 
B)  fructose 
C)  galactose 
D)  maltose 
E)  None of these are monosaccharides. 
A)  glucose 
B)  fructose 
C)  galactose 
D)  maltose 
E)  None of these are monosaccharides.

Question 17

Which of the following foods would be a good source of fiber?

Accepted Answer

A)  peaches 
B)  whole-wheat bread 
C)  peanuts 
D)  bran cereal 
E)  All of these are good sources of fiber. 
A)  peaches 
B)  whole-wheat bread 
C)  peanuts 
D)  bran cereal 
E)  All of these are good sources of fiber.

Question 18

How are fats,phospholipids,and steroids alike?

Accepted Answer

A)  They are all solid at room temperature. 
B)  They each contain a polar phosphate group. 
C)  They each contain only one fatty acid. 
D)  They do not dissolve in water. 
E)  They all contain at least one carbon ring. 
A)  They are all solid at room temperature. 
B)  They each contain a polar phosphate group. 
C)  They each contain only one fatty acid. 
D)  They do not dissolve in water. 
E)  They all contain at least one carbon ring.

Question 19

ATP carries energy in the form of high-energy

Accepted Answer

A)  carbohydrate bonds. 
B)  peptide bonds. 
C)  lipid bonds. 
D)  phosphate bonds. 
E)  hydrogen bonds. 
A)  carbohydrate bonds. 
B)  peptide bonds. 
C)  lipid bonds. 
D)  phosphate bonds. 
E)  hydrogen bonds.

Question 20

When an ATP molecule is used to supply energy,which of the following occurs?

Accepted Answer

A)  a phosphate bond is added 
B)  a phosphate bond is broken 
C)  oxygen is removed 
D)  oxygen is added 
E)  an adenine is added 
A)  a phosphate bond is added 
B)  a phosphate bond is broken 
C)  oxygen is removed 
D)  oxygen is added 
E)  an adenine is added

Exam 2: Chemistry of Life

Which polysaccharide is consumed as a source of fiber?

The presence of a buffer in our blood helps maintain homeostasis.

The primary level of protein structure is composed of amino acids in a linear sequence joined by peptide bonds.

The sides of the DNA ladder (backbone)are

The reason water is polar is because

Radiation can have both positive and negative impact on humans.

On a warm day in April,Tina jumped into the swimming pool.To her surprise the water was really cold.Which property of water did she discover?

When two amino acids combine via a dehydration reaction,

A solution containing 0.00001 moles of H+ has a pH of

What makes each amino acid unique?

Be has an atomic number of 4 and an atomic mass of 9.How many protons does it have?

Atoms that share electrons have what type of bonds?

CaCl2 is a salt that forms as the result of what type of bond?

How many elements occur naturally?

The sex hormones belong to which category of lipids?

Which of the following is not a monosaccharide?

Which of the following foods would be a good source of fiber?

How are fats,phospholipids,and steroids alike?

ATP carries energy in the form of high-energy

When an ATP molecule is used to supply energy,which of the following occurs?

Exploring Life and Science

Cell Structure and Function

Organization and Regulation of Body Systems

Cardiovascular System: Heart and Blood Vessels

Cardiovascular System: Blood

The Lymphatic and Immune Systems

Infectious Diseases

Digestive System and Nutrition

Respiratory System

Urinary System

Skeletal System

Muscular System

Nervous System

Senses

Endocrine System

Reproductive System

Development and Aging

Patterns of Chromosome Inheritance

Cancer

Patterns of Genetic Inheritance

Dna Biology and Technology

Human Evolution

Ecology and the Nature of Ecosystems

Human Interactions With the Biosphere

Filters

A solution containing 0.00001 moles of H⁺ has a pH of

CaCl₂ is a salt that forms as the result of what type of bond?