Chapter 2

List the four biological molecules commonly found in living organisms.

Describe the structure and function of the subcellular organelles.

Describe the structure and function of the plasma membrane.

Electrons _______ A. are negatively charged; B. along with neutrons comprise the nucleus; C. are attracted to the negatively charged nucleus; D. located closest to the nucleus have the most energy; E. all of the above are true.

Which of the following terms is least like the others? A. monosaccharide; B. phospholipid; C. fat; D. steroid; E. lipid.

Different proteins are composed of different sequences of ____ A. sugars; B. glycerols; \(C\). fats; D. amino acids.

Proteins may function as _____ A. genetic material; B. cholesterol molecules; C. fat reserves; D. enzymes; E. all of the above.

A fat molecule consists of _____ A. carbohydrates and proteins; B. complex carbohydrates only; C. saturated oxygen atoms; D. glycerol and fatty acids.

Eukaryotic cells differ from prokaryotic cells in that ________ A. only eukaryotic cells contain DNA; B. only eukaryotic cells have a plasma membrane; C. only eukaryotic cells are considered to be alive; D. only eukaryotic cells have a nucleus; E. only eukaryotic cells are found on Earth.

Which of the following lists the chemical bonds from strongest to weakest? A. hydrogen, covalent, ionic; B. covalent, ionic, hydrogen; C. ionic, covalent, hydrogen D. covalent, hydrogen, ionic; E. hydrogen, ionic, covalent.

Which of the following is not consistent with evolutionary theory? A. All living organisms share a common ancestor; B. The environment affects which organism survives to reproduce; C. Natural selection always favors the same traits, regardless of environment; D. Species change over time.