1. .....Each of the following is an example of an inorganiccompound, except

   		bases.
   		rocks.
   		salts.
   		acids.
   		water.

A.... Carbohydrates, lipids, and proteins are classified as

		organic molecules.
		bases.
		acids.
		salts.
		inorganic molecules.

B .... Which of the following substances would be mostacidic?

		white wine, pH = 3
		tomato juice, pH = 4
		urine, pH = 6
		lemon juice, pH = 2
		stomach secretions, pH = 1

C ... A(n) ________ removes hydrogen ions and a(n) ________releases hydrogen ions.

		base; acid
		compound; element
		molecule; acid
		element; compound
		acid; base

D ... Because water has a high heat of vaporization it

		serves as an excellent lubricant
		participates in chemical reactions
		dissolves many substances
		provides an excellent cooling mechanism

E...If a substance has a pH that is greater than 7, it is

		acidic.
		a salt.
		a buffer.
		neutral.
		alkaline.

F ....The primary high energy molecule formed and used in thecell is

		ATP
		DNA
		glucose
		RNA

G...Hydrophilic molecules readily associate with

		water molecules.
		hydrophobic molecules.
		lipid molecules.
		both A and B
		all of the above

H...All of the following are true concerning enzymes,except that they

		have an active site
		are proteins.
		are consumed during the reaction.
		affect the rate of a chemical reaction.
		function as biological catalysts.

I....Which of the following statements about water isnot correct?

		can dissolve many substances
		is responsible for much of the mass of the human body
		is composed of polar molecules
		contains hydrogen bonds
		has a relatively low heat capacity