Question 1

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) B) and D)
F) All of the above

Question 2

Two or more atoms bonding form a ________.

Accepted Answer

The answer of Two or more atoms bonding form a...

Question 3

The breakdown of table sugar into glucose and fructose is an example of a(n) ________ reaction.

Accepted Answer

A)  synthesis
B)  hydrolysis
C)  acid-base
D)  exchangeE) All of the above
F) A) and C)

Question 4

A protein is formed from a sequence of amino acids.

Accepted Answer

A) True 
 B)False

Question 5

The parts of a protein that change when it denatures are

Accepted Answer

A)  the primary and secondary structures.
B)  the secondary and tertiary structures.
C)  the amino acid sequence and the secondary structure.
D)  the tertiary and quaternary structures.E) A) and C)
F) A) and B)

Question 6

DNA and RNA differ in that

Accepted Answer

A)  RNA has deoxyribose and DNA has ribose.
B)  RNA is double-stranded and DNA is single-stranded.
C)  DNA holds genetic information and RNA uses that information to synthesize protein.
D)  RNA is found only in the nucleus and DNA is found only in the cytoplasm.E) A) and B)
F) None of the above

Question 7

The number of protons in an atom of an element always equals its atomic weight.

Accepted Answer

A) True 
 B)False

Question 8

A complex carbohydrate consists of a phosphate group attached to a sugar molecule.

Accepted Answer

A) True 
 B)False

Question 9

Collagen, a helical protein, became straight and flat as the temperature of its environment was changed. Its primary structure was not altered. What happened to cause it to flatten?

Accepted Answer

A)  Bonds between carbon and oxygen were broken.
B)  Hydrogen bonds were broken.
C)  Peptide bonds were broken.
D)  Peptide bonds were formed.E) B) and D)
F) B) and C)

Question 10

The atoms of different elements have

Accepted Answer

A)  the same atomic number and same atomic weight.
B)  the same atomic number but different atomic weights.
C)  different atomic numbers.
D)  different atomic numbers but the same number of electrons.E) C) and D)
F) B) and D)

Question 11

When placed in a solution, HNO₃ dissociates into H+ and NO₃-. The compound HNO3 must be a(n) ________.

Accepted Answer

A)  base.
B)  nucleotide.
C)  acid.
D)  electron.E) All of the above
F) None of the above

Question 12

Proteins encode nucleic acids.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following best describes the reaction NaNO₃ + HCl → HNO₃ + NaCl?

Accepted Answer

A)  Decomposition reaction
B)  Exchange reaction
C)  Reversible reaction
D)  Synthesis reactionE) A) and C)
F) B) and C)

Question 14

Which of the following is the least likely to dissolve in water?

Accepted Answer

A)  Albumin
B)  A triglyceride
C)  Table sugar (sucrose) 
D)  NucleotidesE) B) and C)
F) A) and B)

Question 15

The compound H₂SO₄ will dissociate in water to create HSO₄⁻ and H⁺. The product HSO₄⁻ is a base.

Accepted Answer

A) True 
 B)False

Question 16

Lard will ________ than peanut oil.

Accepted Answer

A)  contain more water
B)  have more glycerol
C)  have more single carbon-carbon bonds
D)  have fewer hydrogen atoms bonded to carbon atomsE) None of the above
F) A) and B)

Question 17

Synthesis reactions are particularly important in the body for

Accepted Answer

A)  release of energy.
B)  digestion of food products.
C)  growth of body parts.
D)  neutralization of acids by buffers.E) A) and C)
F) All of the above

Question 18

An acid reacting with a base is

Accepted Answer

A)  a synthesis reaction.
B)  hydrolysis.
C)  a decomposition reaction.
D)  an exchange reaction.E) B) and D)
F) B) and C)

Question 19

The atoms of the isotopes of a particular element vary in the number of

Accepted Answer

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

Question 20

Chemistry deals with

Accepted Answer

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

Exam 2: Chemical Basis of Life

The breakdown of table sugar into glucose and fructose is an example of a(n) ________ reaction.

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An acid reacting with a base is

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Chemistry deals with

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Synthesis reactions are particularly important in the body for

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Lard will ________ than peanut oil.

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The number of protons in an atom of an element always equals its atomic weight.

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A protein is formed from a sequence of amino acids.

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A complex carbohydrate consists of a phosphate group attached to a sugar molecule.

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In a covalent bond

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Collagen, a helical protein, became straight and flat as the temperature of its environment was changed. Its primary structure was not altered. What happened to cause it to flatten?

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Two or more atoms bonding form a ________.

Correct AnswerverifiedShow Answer

When placed in a solution, HNO₃ dissociates into H+ and NO₃-. The compound HNO3 must be a(n) ________.

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DNA and RNA differ in that

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Proteins encode nucleic acids.

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Which of the following is the least likely to dissolve in water?

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The parts of a protein that change when it denatures are

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The atoms of different elements have

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Which of the following best describes the reaction NaNO₃ + HCl → HNO₃ + NaCl?

Correct AnswerverifiedShow Answer

The compound H₂SO₄ will dissociate in water to create HSO₄⁻ and H⁺. The product HSO₄⁻ is a base.

Correct AnswerverifiedShow Answer

The atoms of the isotopes of a particular element vary in the number of

Correct AnswerverifiedShow Answer

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