AP Biology Unit 1 Review

Front

What is a meniscus in a capillary tube?

Back

A meniscus is the curve in the surface of a liquid in a container, caused by the adhesive forces between the liquid and the container being stronger than the cohesive forces within the liquid.

Front

What is dehydration synthesis?

Back

Dehydration synthesis is the process of forming a bond between two monomers by removing a water molecule.

Front

What functional group is found in all amino acids?

Back

The -NH2 group, known as the amino group, is found in all amino acids.

Front

How do phospholipids orient in a cell membrane?

Back

Phospholipids orient in a bilayer with hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward.

Front

What type of fatty acid is more fluid at low temperatures?

Back

Unsaturated fatty acids are more fluid at low temperatures because they have kinks in their structure that prevent tight packing.

Front

What is the role of surface tension in liquids?

Back

Surface tension is the cohesive force at the surface of a liquid that makes it behave like a stretched elastic membrane.

Front

What is hydrolysis?

Back

Hydrolysis is the chemical process of breaking down a compound by adding water.

Front

What is the difference between saturated and unsaturated fatty acids?

Back

Saturated fatty acids have no double bonds between carbon atoms, while unsaturated fatty acids have one or more double bonds.

Front

What is a phospholipid?

Back

A phospholipid is a type of lipid molecule that is a major component of cell membranes, consisting of two fatty acids and a phosphate group.

Front

What is the significance of the hydrophilic and hydrophobic regions in phospholipids?

Back

The hydrophilic region interacts with water, while the hydrophobic region repels water, allowing for the formation of a bilayer in cell membranes.