Question 1

An electrolyte ionizes in water.

Accepted Answer

A) True 
 B)False

Question 2

Water is an example of a compound.

Accepted Answer

A) True 
 B)False

Question 3

Proteins

Accepted Answer

A)   are structural materials.
B)   can function as enzymes.
C)   contain C, H, O, and N, and sometimes S.
D)   all of the above.E) None of the above
F) A) and B)

Question 4

Glycogen is a complex carbohydrate that we get directly by eating plants.

Accepted Answer

A) True 
 B)False

Question 5

An acid is an electrolyte that releases hydroxide ions (OH-) in water.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following substances is an element?

Accepted Answer

A)   Iron
B)   Water
C)   Sodium chloride
D)   GlucoseE) B) and C)
F) A) and C)

Question 7

The first electron shell of an atom can hold a maximum of

Accepted Answer

A)   1 electron.
B)   2 electrons.
C)   4 electrons.
D)   8 electrons.E) A) and C)
F) A) and B)

Question 8

On the pH scale

Accepted Answer

A)   a tenfold difference in hydrogen ion concentration separates each whole number.
B)   the lower the whole number on the scale, the greater the H+ concentration.
C)   pH values above 7 are basic (alkaline) .
D)   all of the above.E) B) and D)
F) B) and C)

Question 9

The opposite of a decomposition reaction is a _____ reaction.

Accepted Answer

The answer of The opposite of a decomposition reaction is...

Question 10

The type of subatomic particle that does not have an electrical charge is a(n) ________.

Accepted Answer

The answer of The type of subatomic particle that does...

Question 11

Chemistry deals with

Accepted Answer

A)   the composition and changes of substances that make up living as well as non-living matter.
B)   the composition and changes of substances found in organisms only.
C)   the composition of and changes of substances that make up non-living matter only.
D)   the location of organs in body cavities.E) A) and B)
F) B) and C)

Question 12

Lipids

Accepted Answer

A)   are insoluble in water.
B)   include phospholipids, cholesterol, and fats.
C)   contain C, H, and O, but with proportionately less oxygen than in carbohydrates.
D)   all of the above.E) None of the above
F) A) and C)

Question 13

DNA

Accepted Answer

A)   is a protein.
B)   plays no role in the synthesis of fats.
C)   stores genetic information, including instructions for enzymes that synthesize fats and carbohydrates.
D)   is routinely broken down to provide cellular energy.E) A) and C)
F) B) and D)

Question 14

Which of the following is characteristic of carbohydrates?

Accepted Answer

A)   They contain C, H, O, with twice as many hydrogen as oxygen atoms.
B)   They provide much of the energy that the cell requires.
C)   They include sugars and starches.
D)   all of the above.E) A) and B)
F) B) and C)

Question 15

The informational content of DNA and RNA is in the nitrogenous bases because

Accepted Answer

A)   the bases are of several types and therefore can form a code sequence.
B)   they all contain nitrogen.
C)   the sugars and phosphates vary.
D)   the bases are also parts of amino acids.E) A) and B)
F) B) and C)

Question 16

A substance that releases hydrogen ions in water is a base.

Accepted Answer

A) True 
 B)False

Question 17

In the body, oxygen

Accepted Answer

A)   reacts with water to form carbonic acid.
B)   is used during cellular respiration.
C)   is a major electrolyte.
D)   is produced by cells.E) All of the above
F) A) and B)

Question 18

Chemistry is the study of the composition of matter and how matter changes.

Accepted Answer

A) True 
 B)False

Question 19

In a covalent bond

Accepted Answer

A)   one atom loses and another atom gains electrons.
B)   atoms share a pair or more of electrons.
C)   oppositely charged atoms attract.
D)   like-charged atoms repel.E) All of the above
F) C) and D)

Question 20

Carbon can form ___ covalent bonds.

Accepted Answer

A)   1
B)   2
C)   4
D)   8E) None of the above
F) All of the above

Exam 2: Chemical Basis of Life

The informational content of DNA and RNA is in the nitrogenous bases because

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Which of the following is characteristic of carbohydrates?

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The first electron shell of an atom can hold a maximum of

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In the body, oxygen

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Proteins

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Carbon can form ___ covalent bonds.

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An acid is an electrolyte that releases hydroxide ions (OH-) in water.

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The type of subatomic particle that does not have an electrical charge is a(n) ________.

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A substance that releases hydrogen ions in water is a base.

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An electrolyte ionizes in water.

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DNA

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Water is an example of a compound.

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Lipids

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On the pH scale

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Which of the following substances is an element?

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In a covalent bond

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The opposite of a decomposition reaction is a _____ reaction.

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Chemistry is the study of the composition of matter and how matter changes.

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Glycogen is a complex carbohydrate that we get directly by eating plants.

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Chemistry deals with

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An acid is an electrolyte that releases hydroxide ions (OH^-) in water.

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