Unit 1 Exam Review

Front

Why is water a polar molecule?

Back

Because it has an unequal distribution of charge

Front

How does water form hydrogen bonds?

Back

By the attraction between the positive end of one water molecule and the negative end of another.

Front

Define water’s cohesive and adhesive properties.

Back

Cohesion is water's ability to stick to itself, and adhesion is water's ability to stick to other substances.

Front

How does water form a polar covalent bond within a molecule of water?

Back

By sharing electrons unequally between hydrogen and oxygen

Front

Define the following: ions and isotopes.

Back

Ions are atoms with a different number of electrons, and isotopes are atoms with a different number of neutrons.

Front

List the following bonds in order from weakest to strongest: covalent bond, hydrogen bond, ionic bond, nonpolar covalent bond.

Back

Hydrogen bond, nonpolar covalent bond, covalent bond, ionic bond

Front

Based on the following graph, identify the independent and dependent variable: Independent: Time, Dependent: Number of Plants; Independent: Number of Plants, Dependent: Plant Height; Independent: Plant Height, Dependent: Time; Independent: Time, Dependent: Plant Height

Back

Independent: Time, Dependent: Plant Height

Front

Which process is illustrated below? How can you tell?

Back

Hydrolysis, because water is added

Front

Which of the following is a characteristic of prokaryotic cells?
Options:
They have a nucleus.
They lack membrane-bound organelles.
They are larger than eukaryotic cells.
They contain multiple chromosomes.

Back

They lack membrane-bound organelles.

Front

What is the primary function of carbohydrates in biological systems?

Back

To serve as a primary energy source.