AP Biology- Review Test

Which of the following statements is NOT true?

• 1. Water is polar.

• 1. Water can stabilize the temperature of nearby air.

• 1. Water is essential for life.

• 1. Water is the most abundant molecule in the Earth’s atmosphere.

Which of the following explains why the bonds within a water molecule are described as polar covalent bonds?

• 1. Hydrogen is more electronegative than oxygen, generating a partial negative charge near the hydrogen atom.

• 1. Hydrogen is more electronegative than oxygen, generating a partial positive charge near the hydrogen atom.

• 1. Oxygen is more electronegative than hydrogen, generating a partial negative charge near the oxygen atoms.

• 1. Oxygen is more electronegative than hydrogen, generating a partial positive charge near the oxygen atoms.

Which of the following accurately defines water’s property of adhesion?

• 1. a force that allows surface water molecules to escape and vaporize

• 1. the attraction between water molecules and other molecules

• 1. the intermolecular force between water molecules

• 1. the force that keeps particles dispersed in water

Why can some insects walk on water?

• 1. Insects can walk on water because of its high surface tension.

• 1. Insects can walk on water because it is a polar solvent.

• 1. Insects can walk on water because they are less dense than water.

• 1. Insects can walk on water because they are denser than water.

What are three examples of how the characteristics of water are important in maintaining life?

Choose THREE correct answers.

• The lower density of water as a solid versus a liquid allows ice to float, forming an insulating surface layer for aquatic life.

• The high specific heat capacity of water insulates aquatic life or bodily fluids from temperature changes.

• The high heat of vaporization of water allows animals to cool themselves by sweating.

• The higher density of water as a solid versus a liquid allows ice to float, forming an insulating surface layer for aquatic life.

• The low heat of vaporization of water allows animals to cool themselves by sweating.

Why can water be a good insulator within the body of endothermic (warm-blooded) animals?

• 1. adhesive properties

• 1. surface tension

• 1. heat of vaporization

• 1. specific heat capacity

Dehydration synthesis leads to the formation of what?

• 1. monomers

• polymers

• carbohydrates only

• water only

What is removed during the formation of nucleic acid polymers?

• 1. carbon

• 1. hydroxyl groups

• 1. phosphates

• 1. amino acids

During the breakdown of polymers, which of the following reactions takes place?

• 1. condensation

• 1. covalent bond

• 1. dehydration

• 1. hydrolysis

Energy is released as a result of which of the following chemical reactions?

• 1. condensation

• 1. dehydration synthesis

• 1. hydrolysis

• 1. dissolution