Question 1

A potato stores a reserve of energy in its underground tuber in the form of

Accepted Answer

A)  glycogen. 
B)  fat. 
C)  protein. 
D)  vitamins. 
E)  starch. 
A)  glycogen. 
B)  fat. 
C)  protein. 
D)  vitamins. 
E)  starch. E

Question 2

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 B

Question 3

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. A

Question 4

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 5

NaCl is not an organic molecule.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following nitrogenous bases is not found in DNA?

Accepted Answer

A)  cytosine 
B)  thymine 
C)  uracil 
D)  guanine 
E)  adenine 
A)  cytosine 
B)  thymine 
C)  uracil 
D)  guanine 
E)  adenine

Question 7

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 8

A fat contains how many fatty acids?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

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

List the properties of water.

Accepted Answer

1. Water has a high heat capac

Question 11

The atomic number of an atom is determined by the number of

Accepted Answer

A)  protons. 
B)  neutrons. 
C)  electrons. 
D)  protons and neutrons. 
E)  protons and electrons. 
A)  protons. 
B)  neutrons. 
C)  electrons. 
D)  protons and neutrons. 
E)  protons and electrons.

Question 12

The smallest unit of an element that still retains the chemical and physical properties of that element is called an)

Accepted Answer

A)  isotope. 
B)  nucleus. 
C)  atom. 
D)  molecular bond. 
E)  neutrino. 
A)  isotope. 
B)  nucleus. 
C)  atom. 
D)  molecular bond. 
E)  neutrino.

Question 13

What is the symbol for sodium?

Accepted Answer

A)  Na 
B)  S 
C)  So 
D)  N 
E)  Dm 
A)  Na 
B)  S 
C)  So 
D)  N 
E)  Dm

Question 14

Which grouping of elements is found in carbohydrates?

Accepted Answer

A)  C - H - O 
B)  C - H - P 
C)  H - O - Cl 
D)  N - S - O 
E)  Ca - H - O 
A)  C - H - O 
B)  C - H - P 
C)  H - O - Cl 
D)  N - S - O 
E)  Ca - H - O

Question 15

A fatty acid that contains only single bonds between the carbon atoms is considered

Accepted Answer

A)  saturated. 
B)  unsaturated. 
C)  trans unsaturated. 
D)  a cholestrol. 
E)  a steroid. 
A)  saturated. 
B)  unsaturated. 
C)  trans unsaturated. 
D)  a cholestrol. 
E)  a steroid.

Question 16

Which of the following is not one of the four classes of organic molecules found in cells?

Accepted Answer

A)  vitamins 
B)  lipids 
C)  proteins 
D)  carbohydrates 
E)  nucleic acids 
A)  vitamins 
B)  lipids 
C)  proteins 
D)  carbohydrates 
E)  nucleic acids

Question 17

After lunch, our digestive system will use the process of hydrolysis to break the food down into smaller subunits.

Accepted Answer

A) True 
 B)False

Question 18

An element cannot be broken down by chemical means.

Accepted Answer

A) True 
 B)False

Question 19

The membranes of cells are composed primarily of

Accepted Answer

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

Question 20

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.

Exam 2: Chemistery of Life

A potato stores a reserve of energy in its underground tuber in the form of

How many elements occur naturally?

When two amino acids combine via a dehydration reaction,

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

NaCl is not an organic molecule.

Which of the following nitrogenous bases is not found in DNA?

The reason water is polar is because

A fat contains how many fatty acids?

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

List the properties of water.

The atomic number of an atom is determined by the number of

The smallest unit of an element that still retains the chemical and physical properties of that element is called an)

What is the symbol for sodium?

Which grouping of elements is found in carbohydrates?

A fatty acid that contains only single bonds between the carbon atoms is considered

Which of the following is not one of the four classes of organic molecules found in cells?

After lunch, our digestive system will use the process of hydrolysis to break the food down into smaller subunits.

An element cannot be broken down by chemical means.

The membranes of cells are composed primarily of

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

Human Organization

Cell Structure and Function

Torganization and Regulation of Body Systems

Cardiovascular System : Heart and Blood Vessels

Cardiovascular System : Blood

The Lumphatic and Immune Systems

Biology of Infectious Diseases

Digestive System and Nutrition

Respiratory System

Urinary System

Skeletal System

Muscular System

Nervous System

Senses

Endocring System

Reproductive System

Development and Aging

Patterns of Chromosome Inheritance

Cancer

Patterns of Genetic Inheritance

Dna Piology and Technology

Hummen Evolution

Ecology and the Nature of Ecosystems

Hummen Interactions With the Biosphere

Filters

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

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