Question 1

Starch,cellulose,and glycogen are alike in that

Accepted Answer

A)   they are all made of glucose.
B)   they contain the same number of side chains.
C)   they have the same types of bonds between the monomer units.
D)   they are all found in animals.
E)   they can all be digested by our bodies.F) None of the above
G) A) and D)

Question 2

Which polysaccharide is branched the most?

Accepted Answer

A)   cellulose
B)   starch
C)   glycogenD) None of the above
E) A) and B)

Question 3

Fats and oils function well as energy-storage molecules because they contain carbon.

Accepted Answer

A) True 
 B)False

Question 4

The membranes of cells are composed of

Accepted Answer

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

Question 5

In an atom,the number of protons always equals the number

Accepted Answer

A)   of electrons.
B)   of neutrons.
C)   of neutron and protons.
D)   of quarks.
E)   of neutrinos.F) A) and C)
G) B) and D)

Question 6

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

Accepted Answer

A)   cytosine
B)   thymine
C)   uracil
D)   guanine
E)   adenineF) C) and E)
G) A) and E)

Question 7

The reason water is polar is because

Accepted Answer

A)   in polar molecules atoms share electrons evenly.
B)   the oxygen atom is larger than the hydrogen atom.
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.F) D) and E)
G) B) and E)

Question 8

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.F) B) and D)
G) None of the above

Question 9

In an acidic solution

Accepted Answer

A)   the number of H+ is less than the number of OH-.
B)   the number of H+ is greater than the number of OH-.
C)   the number of H+ is equal to the number of OH-.D) A) and B)
E) A) and C)

Question 10

William noticed blood mysteriously climbing up a capillary tube.This is an example of which property of water?

Accepted Answer

A)   Frozen water is less dense than liquid water.
B)   The temperature of liquid water rises and falls slowly.
C)   Water molecules are cohesive.
D)   Water has a high heat of vaporization.
E)   Water is a solvent.F) C) and D)
G) B) and D)

Question 11

How many elements occur naturally?

Accepted Answer

A)   112
B)   92
C)   64
D)   32
E)   6F) A) and E)
G) All of the above

Question 12

Which of the following is not a monosaccharide?

Accepted Answer

A)   glucose
B)   fructose
C)   galactose
D)   maltoseE) All of the above
F) B) and C)

Question 13

Which of the following characteristics of water is most responsible for the sinking of the Titanic?

Accepted Answer

A)   Water is liquid at room temperature.
B)   Water has a high heat of vaporization.
C)   The temperature of liquid water rises and falls slowly.
D)   Frozen water is less dense than liquid water.
E)   Water molecules are cohesive.F) A) and B)
G) B) and E)

Question 14

Hydrogen bonds

Accepted Answer

A)   result from the loss of neutrons by an atom.
B)   result in the formation of salts.
C)   involve the loss and gain of electrons.
D)   involve the sharing of electrons.
E)   are relatively weak and can be broken rather easily.F) A) and B)
G) C) and D)

Question 15

What passes through the digestive tract as fiber or roughage?

Accepted Answer

A)   Chitin
B)   Glucose
C)   Glycogen
D)   Starch
E)   CelluloseF) A) and E)
G) B) and D)

Question 16

A solution with a pH of 7 has 10 times as many H+ as a pH of 6.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A)   an isotope.
B)   a nucleus.
C)   an atom.
D)   a molecular bond.
E)   a neutrino.F) B) and C)
G) C) and D)

Question 18

Why is He over Ne in the periodic table? (Refer to Figure 2.1)

Accepted Answer

A)   They both have the same atomic mass.
B)   They both have the same number of electrons in their outermost orbital.
C)   They both have a full outermost orbital.
D)   They both have the same atomic number.
E)   They both have the same number of protons in their nuclei.F) A) and B)
G) C) and D)

Question 19

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 acidsF) A) and E)
G) B) and E)

Question 20

An element has its outermost orbital full and contains more than 2 electrons.Which element is this?

Accepted Answer

A)   He
B)   Ne
C)   C
D)   N
E)   OF) C) and E)
G) A) and C)

Exam 2: Chemistry of Life

How many elements occur naturally?

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The reason water is polar is because

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An element has its outermost orbital full and contains more than 2 electrons.Which element is this?

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Why is He over Ne in the periodic table? (Refer to Figure 2.1)

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In an atom,the number of protons always equals the number

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

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

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Which of the following characteristics of water is most responsible for the sinking of the Titanic?

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

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Hydrogen bonds

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Which polysaccharide is branched the most?

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What passes through the digestive tract as fiber or roughage?

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Which of the following is not a monosaccharide?

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

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Fats and oils function well as energy-storage molecules because they contain carbon.

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William noticed blood mysteriously climbing up a capillary tube.This is an example of which property of water?

Correct AnswerverifiedShow Answer

Starch,cellulose,and glycogen are alike in that

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The membranes of cells are composed of

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A solution with a pH of 7 has 10 times as many H+ as a pH of 6.

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In an acidic solution

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A solution with a pH of 7 has 10 times as many H⁺ as a pH of 6.

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