Bio Water and Macromolecules Quiz

1. Water molecules are polar, with the

• oxygen side being slightly positive and the hydrogen side being slightly negative

• oxygen and hydrogen sides being slightly positive.

• oxygen and hydrogen sides being slightly negative.

• oxygen side being slightly negative and the hydrogen side being slightly positive.

Why does ice float in liquid water?

• The liquid water molecules have more kinetic energy and thus support the ice.

• The ionic bonds between the molecules in ice prevent the ice from sinking.

• Ice always has air bubbles that keep it afloat.

• Hydrogen bonds stabilize and keep the molecules of ice farther apart than the water molecules of liquid water.

• The crystalline lattice of ice causes it to be denser than liquid water.

Based on your knowledge of the polarity of water molecules, the solute molecule is most likely

• positively charged.

• negatively charged.

• without charge.

• hydrophobic.

• nonpolar.

1. The unique attractive forces that keep molecules of water together are called:

• strong forces.

• adhesion.

• hydrogen bonds

• cohesion.

• weak nuclear forces.

The property of water whereby molecules tend to stick to one another is called:

• cohesion

• polarity

• dissolving ability

• adhesion

• viscosity

Tags

NGSS.HS-ESS2-5

1. The property of water whereby molecules tend to stick to objects is called:

• cohesion

• polarity

• dissolving ability

• adhesion

• viscosity

Tags

NGSS.HS-ESS2-5

1. Water is unique because its solid phase is ____ the liquid phase.

• denser than

• similar to

• less dense than

• less dense than or similar to

• none of these

Tags

NGSS.HS-ESS2-5

1. Which of the following compounds would NOT be classified as a carbohydrate?

• Starch

• Glucose

• Enzymes

• Cellulose

• Deoxyribose

1. Carbohydrates are made of carbon, hydrogen and oxygen atoms. What is the typical ratio of these atoms to each other?

• 3:1

• 1:2:1

• 2:2:2

• 4:2:4

• 9:3:3:1

1. Which of the following is not a lipid?

• Oil

• Fat

• Glycerol

• Monosaccharide

• Triglyceride