2.1 Atoms, Ions, and Molecules

1			If the atomic weight of hydrogen = 1 amu and that of oxygen = 16 amu, what is the molecular weight of water?
			A)	16
			B)	17
			C)	18
			D)	32
2			If an atom undergoes ionization to lose two electrons, what is its new charge?
			A)	negative two
			B)	negative one
			C)	positive two
			D)	positive one
3			Which of the forms of ionizing radiation from a source outside the body is the most dangerous?
			A)	alpha particle
			B)	beta particle
			C)	gamma ray
			D)	neutron particle
4			Valence electrons
			A)	determine chemical bonding properties.
			B)	are electrons of the outermost shell.
			C)	have a maximum number of eight.
			D)	All of the above.
5			Which of the following is incorrect?
			A)	Isotopes have identical chemical behaviors.
			B)	Isotopes have different physical properties.
			C)	Isotopes have the same atomic weights but different atomic numbers.
			D)	Unstable isotopes decay and release radiation.

2.2 Water and Mixtures

6			The amount of an electrolyte that would neutralize one mole of H+ or OH- is always called
			A)	one mole.
			B)	one equivalent (Eq).
			C)	one molar.
			D)	None of the above.
7			What is the mEq/L of 2 mM Fe3+ electrolyte solution?
			A)	2 mEq
			B)	3 mEq
			C)	5 mEq
			D)	6 mEq
8			Chemical solutions that resist changes in pH are called _____________.
			A)	stabilizers
			B)	neutralizers
			C)	buffers
			D)	emulsifiers
9			A one molar solution of sodium hydroxide (NaOH-molecular weight 40) would contain one liter of water and how much sodium hydroxide?
			A)	1 g
			B)	180 g
			C)	120 g
			D)	40 g
			E)	80 g
10			When counting items we commonly refer to twelve of something as "a dozen." What is the term used to describe Avogadro's number of 6.023 X 10 to the 23rd?
			A)	a gram
			B)	a cubic centimeter
			C)	a milliliter
			D)	a mole

2.3 Energy and Chemical Reactions

11			For the reaction: CO2 + H2O ↔ H2CO3 ↔ HCO3- + H+, what would result if an acid is added?
			A)	A shift to the left side of the equation would occur producing more CO2 + H2O.
			B)	It would remain at equilibrium.
			C)	A shift to the right side of the equation would occur producing more HCO3-.
			D)	More H2CO3 would remain.
12			When a nicotinamide molecule picks up an extra electron, it becomes
			A)	oxidized.
			B)	reduced.
			C)	entropized.
			D)	radioactivated.
			E)	acidified.
13			The joining of two glucose molecules, with the subsequent removal of water to form maltose is an example of a(n) __________ reaction.
			A)	moiety
			B)	monomerization
			C)	lipid
			D)	dehydration synthesis
			E)	hydrolysis
14			A catalyst would
			A)	reduce reaction time.
			B)	increase reaction time.
			C)	not alter the reaction time.
			D)	stop the reaction.
15			What type of reaction is represented in the following chemical equation? AB ---> A + B
			A)	decomposition reaction
			B)	synthesis reaction
			C)	exchange reaction
			D)	reversible reaction

2.4 Organic Compounds

16			Which of these carbohydrates is impossible for humans to digest?
			A)	cellulose
			B)	amylose
			C)	glycogen
			D)	galactose
17			Which of the following conjugated carbohydrates are attached to cell surfaces?
			A)	glycogen and amylose
			B)	glycolipids and glycoproteins
			C)	cellulose and starch
			D)	All of the answers are correct
18			Which of the following is true about a triglyceride molecule?
			A)	It contains a glycerol molecule.
			B)	It contains three fatty acids.
			C)	It has a neutral pH.
			D)	All of the above.
19			What is the primary function of eicosanoids?
			A)	formation of cell membranes
			B)	chemical signaling between cells
			C)	nervous system functions
			D)	component of nucleus
20			The removal of a phosphate group would yield
			A)	a large amount of energy.
			B)	biological inactivity of the molecule.
			C)	GDP.
			D)	None of the above.