Question 1

The presence of a buffer in our blood is an example of homeostasis.

Accepted Answer

A) True 
 B)False

Question 2

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.F) C) and D)
G) All of the above

Question 3

Ca3(PO4) 2 represents a/an

Accepted Answer

A)   element.
B)   mixture.
C)   compound.
D)   isotope.
E)   atom.F) A) and D)
G) C) and E)

Question 4

What is iodine 131,used in medicine to produce various images of organs and tissues,called?

Accepted Answer

A)   A mixture
B)   A tracer
C)   An emulsion
D)   A colloid
E)   A sensorF) C) and D)
G) All of the above

Question 5

A combination of two or more atoms of the same type is called

Accepted Answer

A)   an atomic unit.
B)   a molecule.
C)   a compound.
D)   an isotope.
E)   an ion.F) B) and C)
G) All of the above

Question 6

The sex hormones belong to which category of lipids?

Accepted Answer

A)   steroids
B)   fats
C)   oils
D)   triglycerides
E)   phospholipidsF) A) and E)
G) A) and C)

Question 7

Atoms that share electrons have what type of bonds?

Accepted Answer

A)   covalent
B)   neutral
C)   hydrogen
D)   colloidal
E)   ionicF) D) and E)
G) C) and D)

Question 8

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 1 fatty acid.
D)   They do not dissolve in water.
E)   They all contain at least one carbon ring.F) C) and E)
G) B) and D)

Question 9

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

Accepted Answer

A)   covalent
B)   hydrogen
C)   polar
D)   non-polar
E)   ionicF) A) and E)
G) A) and D)

Question 10

Which of the following is not a function of proteins?

Accepted Answer

A)   quick energy
B)   support
C)   transport
D)   enzymes
E)   motionF) C) and D)
G) B) and C)

Question 11

A hydrolysis reaction involves the loss of water.

Accepted Answer

A) True 
 B)False

Question 12

An element cannot be broken down by chemical means.

Accepted Answer

A) True 
 B)False  True

Question 13

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)   13E) None of the above
F) B) and C)

Question 14

ATP is called the energy currency of the body because it is a type of electricity.

Accepted Answer

A) True 
 B)False

Question 15

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.F) C) and D)
G) A) and B)

Question 16

Carbon dating is a common method employed in dating certain kinds of fossils.It is based upon the radioactive decay of an isotope of carbon (C14) .Referring to the atomic number of carbon attained from figure 2.1,how many neutrons does C14 have?

Accepted Answer

A)   2
B)   4
C)   8
D)   12
E)   14F) B) and C)
G) None of the above

Question 17

Examine the section of the periodic table in Figure 2.1.Which element will behave similarly to C?

Accepted Answer

A)   Ca
B)   S
C)   Ar
D)   Si
E)   MgF) A) and B)
G) A) and E) D

Question 18

What makes each amino acid unique?

Accepted Answer

A)   the central carbon
B)   the R group
C)   the amino group
D)   the carboxyl groupE) A) and D)
F) A) and C)

Question 19

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) and B)
E) None of the above

Question 20

Joining small molecules (monomers) together to form longer chains (polymers) requires a process called

Accepted Answer

A)   a hydrolysis reaction.
B)   a dehydration reaction.
C)   monomerization.
D)   emulsification.
E)   disassembly.F) All of the above
G) C) and D) B

Exam 2: Chemistry of Life

The presence of a buffer in our blood is an example of homeostasis.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedShow Answer

Ca3(PO4) 2 represents a/an

Correct AnswerverifiedShow Answer

What is iodine 131,used in medicine to produce various images of organs and tissues,called?

Correct AnswerverifiedShow Answer

A combination of two or more atoms of the same type is called

Correct AnswerverifiedShow Answer

The sex hormones belong to which category of lipids?

Correct AnswerverifiedShow Answer

Atoms that share electrons have what type of bonds?

Correct AnswerverifiedShow Answer

How are fats,phospholipids,and steroids alike?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a function of proteins?

Correct AnswerverifiedShow Answer

A hydrolysis reaction involves the loss of water.

Correct AnswerverifiedShow Answer

An element cannot be broken down by chemical means.

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

ATP is called the energy currency of the body because it is a type of electricity.

Correct AnswerverifiedShow Answer

The sides of the DNA ladder (backbone) are

Correct AnswerverifiedShow Answer

Carbon dating is a common method employed in dating certain kinds of fossils.It is based upon the radioactive decay of an isotope of carbon (C14) .Referring to the atomic number of carbon attained from figure 2.1,how many neutrons does C14 have?

Correct AnswerverifiedShow Answer

Examine the section of the periodic table in Figure 2.1.Which element will behave similarly to C?

Correct AnswerverifiedD

What makes each amino acid unique?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Joining small molecules (monomers) together to form longer chains (polymers) requires a process called

Correct AnswerverifiedB

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Ca₃(PO₄) ₂ represents a/an

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

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True

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Carbon dating is a common method employed in dating certain kinds of fossils.It is based upon the radioactive decay of an isotope of carbon (C¹⁴) .Referring to the atomic number of carbon attained from figure 2.1,how many neutrons does C¹⁴ have?

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D

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B