First Semester Final Exam

Front

What is an amino acid?

Back

Amino acids are organic compounds that serve as the building blocks of proteins. They contain an amino group, a carboxyl group, and a unique R group that determines the properties of each amino acid.

Front

How do amino acids differ from one another?

Back

Amino acids differ from one another based on the chemical structure of their R group.

Front

Convert 5 grams to milligrams.

Back

5 grams is equal to 5,000 milligrams.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What defines the atomic structure of an isotope?

Back

The atomic structure of an isotope is defined by the number of protons, neutrons, and electrons it contains.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What event changes an atom into an ion?

Back

An atom becomes an ion through the gain or loss of one or more electrons.

Front

What are lipids?

Back

Lipids are a group of organic compounds that are insoluble in water but soluble in organic solvents, including fats and oils.

Front

What is polarity in molecules?

Back

Polarity refers to the distribution of electrical charge over the atoms joined by the bond. Polar molecules have a partial positive charge on one side and a partial negative charge on the other.

Front

How do lipid molecules interact with water?

Back

Lipid molecules are nonpolar and repel water molecules, which are polar.