1)

Water has a high boiling point and low freezing point, highself-cohesion, and lower density in the solid phase than in theliquid phase. All these properties can be attributed to______________.

		the ability of water molecules to hydrogen bond with oneanother
		repulsion of hydrophobic (nonpolar) solutes by watermolecules
		the ability of water molecules to form covalent bonds with oneanother
		the inability of water molecules to interact with amphipathicsolutes

2)

Based on your knowledge of relative electronegativities amongthe elements common in living cells, which of these chemical groupscontaining hydrogen would be most likely to participate in forminga hydrogen bond? \"R\" represents the rest of themolecule.

		R-S–H
		R-C≡C–H
		R-H2C–H
		R-HN–H

3)

In the lining of your stomach, ATP is hydrolyzed to ADP andphosphate ion by a transporter, releasing energy that is used topump protons (H⁺) from interstitial fluid into thestomach lumen. We learned that energy can make a mass accelerateover a distance. What is the mass and what is the distance in theH⁺ transport system?

		Phosphate ion is the mass and ATP→ADP is the distance
		ATP is the mass and ATP-binding site→ADP-release site is thedistance
		H+ is the mass and interstitial fluid→lumen is thedistance
		The transporter is the mass and interstitial fluid→transporteris the distance