AP Biology Fall Exam Review

Front

How do two water molecules most likely interact?

Back

A hydrogen bond will form between the hydrogen atom of one water molecule and the oxygen atom of the other water molecule.

Front

A new dish soap claims that it is able to remove grease from pots and pans while still fully dissolving in the dishwasher water. Which of the following best explains the ideal structure of the dish soap molecule?

Back

The dish soap molecule must be nonpolar at one end to dissolve grease, and polar at the other end so it can dissolve in water.

Front

Why is water an effective solvent?

Back

Water’s polarity allows it to dissolve ionic and polar compounds.

Front

What gives water its cohesive properties?

Back

Hydrogen bonds between the hydrogens in one water molecule are attracted to the oxygens of other water molecules.

Front

Given the structure of water, H₂O, which of the following must be true?

Back

Each water molecule can form four hydrogen bonds.

Front

Why does ice float on the surface of a pond?

Back

The increased number of hydrogen bonds in ice compared to liquid water causes the water molecules in ice to be further apart.

Front

Which observation could be best explained by water’s high surface tension?

Back

A leaf floats on the surface of a puddle.

Front

Which of the following best describes water's ability to dissolve certain substances such as glucose, but remain separate from other substances such as oils?

Back

Water molecules are polar, consisting of two partially positive hydrogen atoms, and one partially negative oxygen atom.

Front

Role of water in the reaction where two amino acids form a dipeptide?

Back

Water is a product that forms as a result of a dehydration synthesis reaction between the two amino acid monomers.

Front

The human body is capable of digesting the complex polymer starch into simpler subunits. This digestive process requires the presence of water and the enzyme amylase in order to break down starch into maltose. This is depicted below. Which of the following statements best describes the digestion of starch into maltose?

• This is a dehydration synthesis reaction that produces water when forming a complex polymer from simpler subunits.
• This is a hydrolysis reaction that requires water to break down a complex polymer into simpler subunits.
• This is a dehydration synthesis reaction that requires water to form a complex polymer from simpler subunits.
• This is a hydrolysis reaction that forms water by breaking down a complex polymer into simpler subunits.

Back

This is a hydrolysis reaction that requires water to break down a complex polymer into simpler subunits.