Unit 3 Review

Antibodies that protect against diseases are made of...

• proteins

• carbohydrates

• lipids

• nucleic acids

What property allowed the paper clip to float on top of the water?

• cohesion

• thermal

• solubility

How do pH levels that are too acidic affect enzyme activity?

• They increase the action of enzymes.

• They reduce the action of enzymes.

• They denature enzymes.

You find an unknown organism. After observing it under the microscope, you notice its cells contain a nucleus, cell walls, and chloroplast. Which kingdom does this organism belong to?

• protista

• fungi

• animalia

• plantae

Our sweat is mostly made of water. Why does sweating help us cool off?

• because water freezes at 0 degrees Celsius

• because water has a high heat capacity

• because water is a universal solvent

• because water is cohesive

A water molecule is ________ because it has a positive and negative side.

The oxygen on a water molecule is slightly ________.

Which of the following are examples of proteins?

• hair, fat, and cell walls

• hair, nails, and enzymes

• fats, DNA, and enzymes

• breads, muscles, and DNA

Which macromolecule insulates organisms?

• carbohydrates

• lipids

• proteins

• nucleic acids

What is the monomer for proteins?

• nucleotides

• fatty acids

• amino acids

• glycerol