Practice Final Exam

Front

Definition of ecosystem

A community of organisms interacting with their physical environment is a(n)

Multiple Choice

• population.

• organism.

• biosphere.

• ecosystem.

• macromolecular community.

Back

• ecosystem.

Front

The classification of a species

The grouping or classification of species is termed

Multiple Choice

• genus.

• kingdom.

• taxonomy.

• biology.

• physiology.

Back

taxonomy.

Front

Atomic number definition

The atomic number of an atom is

Multiple Choice

• the number of protons in the atom.

• the number of neutrons in the atom.

• the number of protons and electrons in the atom.

• the number of protons and neutrons in the atom.

• None of these choices are correct.

Back

the number of protons in the atom.

Front

Isotope definition

Isotopes are different forms of the same element that

Multiple Choice

• are all produced artificially.

• differ in their number of protons.

• cannot form ions.

• differ in their number of neutrons.

• cannot form covalent bonds.

Back

differ in their number of neutrons.

Front

Types of Bonds

When one atom loses an electron to another atom, it results in the formation of

Multiple Choice

• a polar covalent bond and a new molecule.

• a cation and an anion that can form an ionic bond.

• a covalent bond between the two.

• many hydrogen bonds.

• a nonpolar covalent bond that is difficult to break.

Back

a cation and an anion that can form an ionic bond.

Front

Low pH

If orange juice has a pH of 4, then it can be described as

Multiple Choice

• having a concentration of 4.

• an acidic solution.

• an alkaline solution.

• an acidic solution with a concentration of 4.

• None of these choices are correct.

Back

• an acidic solution.

Front

Isomer definition

Two molecules with identical molecular formulas but different structures are called

Multiple Choice

• polymers.

• isomers.

• isotopes.

• monomers.

• dimers.

Back

Isomers.

Front

Glycogen

Glycogen is to animal cells as _________blank is to plant cells.

Multiple Choice

• lipid

• cellulose

• starch

• protein

• sugar

Back

Starch

Front

Bonds between Saccharides

A disaccharide, such as maltose, consists of two molecules of glucose linked by what type of bond?

Multiple Choice

• phosphodiester

• glycosidic

• steroid

• peptide

• hydrogen

Back

glycosidic

Front

Saccharides

Which of the following is considered the largest molecule?

Multiple Choice

• monosaccharide.

• disaccharide.

• polysaccharide.

• glucose.

• sucrose.

Back

polysaccharide.