Question 1

Cobalt-60 is used for radiation treatments of cancer. How many neutrons does an atom of Co-60 have?

Accepted Answer

The answer of Cobalt-60 is used for radiation treatments of...

Question 2

Which of the following is a source of nitrogen for the body?

Accepted Answer

A)   carbohydrates
B)   water
C)   proteins
D)   glucose
E)   lipidsF) A) and B)
G) A) and D)

Question 3

Starch is the

Accepted Answer

A)   storage carbohydrate in animals.
B)   storage carbohydrate in plants.
C)   nondigestible plant polysaccharide.
D)   major nutrient for most body cells.
E)   sugar found in RNA.F) A) and B)
G) A) and C)

Question 4

Cobalt-60 is used for radiation treatments of cancer. What is the mass number of Co-60?

Accepted Answer

The answer of Cobalt-60 is used for radiation treatments of...

Question 5

Which of the following is NOT a function of carbohydrates in the body?

Accepted Answer

A)   structural component of DNA
B)   protection
C)   bulk in feces
D)   energy
E)   structural component of RNAF) C) and D)
G) B) and E)

Question 6

The energy stored in ATP is a form of ________ energy.

Accepted Answer

A)   mechanical
B)   chemical
C)   kinetic
D)   heat
E)   electricalF) A) and E)
G) B) and C)

Question 7

A molecule is

Accepted Answer

A)   a combination of atoms held together by chemical bonds.
B)   a positively charged ion.
C)   a negatively charged ion.
D)   a substance that conducts electricity when placed in solution.
E)   an alteration in the three-dimensional structure of a protein.F) A) and B)
G) A) and C)

Question 8

The element uranium has a mass number of 238 and contains 92 protons. How many electrons does an atom of uranium have?

Accepted Answer

The answer of The element uranium has a mass number...

Question 9

An electrolyte is

Accepted Answer

A)   a combination of atoms held together by chemical bonds.
B)   a positively charged ion.
C)   a negatively charged ion.
D)   a substance that conducts electricity when placed in solution.
E)   the alteration in the three-dimensional structure of a protein.F) A) and C)
G) B) and C)

Question 10

-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of molecule is found at "E"?

Accepted Answer

A)   hydrogen bond
B)   water molecule
C)   oxygen atom
D)   hydrogen atom
E)   polar covalent bondF) C) and D)
G) None of the above

Question 11

Which of the following organic groups does a steroid belong to?

Accepted Answer

A)   carbohydrate
B)   protein
C)   lipid
D)   nucleic acid
E)   vitaminF) A) and C)
G) None of the above

Question 12

Heat energy is

Accepted Answer

A)   the form of energy that actually does work.
B)   movement of ions or electrons.
C)   energy that flows between objects with different temperatures.
D)   stored energy that could do work but is not doing so.
E)   energy that moves in waves.F) A) and C)
G) A) and E)

Question 13

Covalent bonds form when

Accepted Answer

A)   atomic nuclei fuse.
B)   molecules become ionized.
C)   neutrons are transferred from one atom to another.
D)   protons are lost from atoms.
E)   electrons are shared between two atoms.F) A) and B)
G) A) and C)

Question 14

A neutral atom will become a cation if it

Accepted Answer

A)   gains electrons.
B)   gains protons.
C)   loses electrons.
D)   loses protons.
E)   gains neutrons.F) A) and B)
G) A) and E)

Question 15

Denaturation is

Accepted Answer

A)   a combination of atoms held together by chemical bonds.
B)   a positively charged ion.
C)   a negatively charged ion.
D)   a substance that conducts electricity when placed in solution.
E)   a change in the three-dimensional structure of a protein.F) B) and E)
G) C) and D)

Question 16

Cellulose is the

Accepted Answer

A)   storage carbohydrate in animals.
B)   storage carbohydrate in plants.
C)   nondigestible plant polysaccharide.
D)   major nutrient for most body cells.
E)   sugar found in RNA.F) C) and D)
G) A) and C)

Question 17

Which of the following organic groups does DNA belong to?

Accepted Answer

A)   carbohydrate
B)   protein
C)   lipid
D)   nucleic acid
E)   vitaminF) B) and D)
G) A) and D)

Question 18

A solution that contains one osmole of solute in one kilogram (kg)  of water is called a

Accepted Answer

A)   1% solution.
B)   1 molar solution.
C)   10% solution.
D)   1 osmolal solution.
E)   None of these choices are correct.F) C) and E)
G) B) and E)

Question 19

The model that helps explain how an enzyme works is the

Accepted Answer

A)   activation model.
B)   lock-and-key model.
C)   three-dimensional model.
D)   denaturation model.E) None of the above
F) A) and D)

Question 20

The molecule used most frequently by cells as a fuel belongs to which of the following groups?

Accepted Answer

A)   prostaglandins
B)   carbohydrates
C)   nucleic acids
D)   steroids
E)   phospholipidsF) A) and E)
G) C) and D)

Exam 2: The Chemical Basis of Life

Starch is the

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Cellulose is the

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A molecule is

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Which of the following organic groups does a steroid belong to?

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The energy stored in ATP is a form of ________ energy.

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Which of the following organic groups does DNA belong to?

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Which of the following is NOT a function of carbohydrates in the body?

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Denaturation is

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Heat energy is

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-Water accounts for 50% of the weight of a young adult female and 60% of a young adult male. What kind of molecule is found at "E"?

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An electrolyte is

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A solution that contains one osmole of solute in one kilogram (kg) of water is called a

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Which of the following is a source of nitrogen for the body?

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The model that helps explain how an enzyme works is the

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A neutral atom will become a cation if it

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Covalent bonds form when

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Cobalt-60 is used for radiation treatments of cancer. How many neutrons does an atom of Co-60 have?

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The element uranium has a mass number of 238 and contains 92 protons. How many electrons does an atom of uranium have?

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Cobalt-60 is used for radiation treatments of cancer. What is the mass number of Co-60?

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The molecule used most frequently by cells as a fuel belongs to which of the following groups?

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