Question 1

When forming a bond, an atom that has 3 electrons in its second shell and a filled first shell will

Accepted Answer

A)   lose 3 electrons from its second shell.
B)   lose all of the electrons from its first shell.
C)   lose all of the electrons from both its first and second shells.
D)   gain 5 electrons in its second shell.E) A) and B)
F) None of the above

Question 2

A person has alkalosis if the blood pH

Accepted Answer

A)   is above 7.0.
B)   is below 7.0.
C)   rises above 7.5.
D)   drops below 7.3.E) B) and D)
F) B) and C)

Question 3

PET imaging follows the emission of

Accepted Answer

A)   positrons.
B)   electrons.
C)   neutrons.
D)   protons.E) A) and B)
F) None of the above

Question 4

Isotopes of an element 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 but the same atomic weight.
D)   different atomic numbers and different atomic weights.E) B) and C)
F) A) and D)

Question 5

The isotope most likely to be used to study the thyroid gland is

Accepted Answer

A)   iodine-131.
B)   iron-59.
C)   thallium-201.
D)   cobalt-60.E) A) and B)
F) A) and C)

Question 6

The atomic weight of an element whose atoms contain 8 protons, 8 electrons, and 8 neutrons is

Accepted Answer

A)   8.
B)   16.
C)   24.
D)   32.E) All of the above
F) A) and B)

Question 7

Bases reacting with acids form ________ and water.

Accepted Answer

A)   buffers
B)   salts
C)   new elements
D)   proteinsE) A) and C)
F) B) and C)

Question 8

At atom that has gained or lost electrons is called an ion.

Accepted Answer

A) True 
 B)False

Question 9

Electrolytes are substances that

Accepted Answer

A)   form covalent bonds with water.
B)   ionize in water.
C)   cannot conduct electricity in solution.
D)   form bonds that are stable in water.E) C) and D)
F) None of the above

Question 10

Which of these is not a monosaccharide?

Accepted Answer

A)   Glucose
B)   Ribose
C)   6-carbon sugar
D)   SucroseE) C) and D)
F) A) and B)

Question 11

An atom with 10 protons and which has lost 2 electrons is electrically neutral.

Accepted Answer

A) True 
 B)False

Question 12

Chemically inert atoms always have their outermost electron shell full.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following molecules does not have a polar region?

Accepted Answer

A)   Water
B)   Triglyceride
C)   Water-soluble amino acid
D)   GlucoseE) A) and B)
F) A) and C)

Question 14

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 B)
F) C) and D)

Question 15

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) C) and D)
F) B) and C)

Question 16

The secondary structure of a protein molecule is the result of

Accepted Answer

A)   oxygen double bonds.
B)   covalent bonds.
C)   ionic bonds.
D)   hydrogen bonds.E) A) and B)
F) A) and C)

Question 17

Sodium ions and calcium ions are examples of

Accepted Answer

A)   cations.
B)   uncharged particles.
C)   anions.
D)   salts.E) A) and D)
F) C) and D)

Question 18

Atomic radiation is useful for treating cancer because

Accepted Answer

A)   radiation affects cancer cells but not normal cells.
B)   radiation protects normal cells against the effects of cancer.
C)   radiation harms cancer cells more readily than it does most non-cancer cells.
D)   normal cells are not affected by radiation.E) None of the above
F) A) and B)

Question 19

A decomposition reaction can be symbolized by

Accepted Answer

A)   A + B → C + D
B)   A + B → AB
C)   AB → A + B
D)   C +  → ABE) B) and D)
F) B) and C)

Question 20

The ______ uses iodine in a synthesis reaction.

Accepted Answer

A)   spleen
B)   liver
C)   thymus
D)   thyroid glandE) B) and D)
F) A) and C)

Exam 2: Chemical Basis of Life

Which of the following molecules does not have a polar region?

Correct AnswerverifiedShow Answer

Synthesis reactions are particularly important in the body for

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Chemically inert atoms always have their outermost electron shell full.

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The atomic weight of an element whose atoms contain 8 protons, 8 electrons, and 8 neutrons is

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Isotopes of an element have

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Which of these is not a monosaccharide?

Correct AnswerverifiedShow Answer

Atomic radiation is useful for treating cancer because

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Sodium ions and calcium ions are examples of

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The isotope most likely to be used to study the thyroid gland is

Correct AnswerverifiedShow Answer

When forming a bond, an atom that has 3 electrons in its second shell and a filled first shell will

Correct AnswerverifiedShow Answer

Bases reacting with acids form ________ and water.

Correct AnswerverifiedShow Answer

The secondary structure of a protein molecule is the result of

Correct AnswerverifiedShow Answer

PET imaging follows the emission of

Correct AnswerverifiedShow Answer

A decomposition reaction can be symbolized by

Correct AnswerverifiedShow Answer

The parts of a protein that change when it denatures are

Correct AnswerverifiedShow Answer

At atom that has gained or lost electrons is called an ion.

Correct AnswerverifiedShow Answer

Electrolytes are substances that

Correct AnswerverifiedShow Answer

The ______ uses iodine in a synthesis reaction.

Correct AnswerverifiedShow Answer

A person has alkalosis if the blood pH

Correct AnswerverifiedShow Answer

An atom with 10 protons and which has lost 2 electrons is electrically neutral.

Correct AnswerverifiedShow Answer

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