Chapter 2 Practice Test: The Chemistry of Life

Which subatomic particles are found in the nucleus of an atom?

Protons and Neutrons

Which term best describes a substance formed by the chemical combination of two or more elements?

Compound

Which type of bond involves the transfer of electrons?

Ionic

A water molecule is polar because

The oxygen atom is slightly negative and the hydrogen is slightly positive

Cohesion is responsible for

Water molecules sticking together

The pH scale measures

Acidity and Basicity

Which of the following is not a macromolecule?

Water

The monomers of proteins are

Amino acids

Which macromolecule stores genetic information

Nucleic acid

A molecule with a long hydrocarbon chain is mostly likely a

Lipid

Enzymes function by

Lowering activation energy

What happens to enzymes at very high temperatures

They denature and lose function

Which property of water allows insects to walk in its surface

Cohesion

The element carbon can form how many covalent bonds?

4

A solution with a pH of 2 is

Strongly acidic

What is the main function of carbohydrates

Provide short-term energy

Which term refers to the energy needed to start a chemical reaction

Activation energy

The variable that changes the shape of an enzyme’s active site most directly is

Temperature

A polymer is formed through which process

Dehydration synthesis

Which of the following is an example of an enzyme

Amylase