The enzyme ________ unzips and unwinds the DNA molecule. A) DNA polymerase B) helicase C) primase D) DNA ligase E) unzipase

Which of the following statements about DNA replication is TRUE? A) the leading strand is replicated continuously, while the lagging strand is replicated discontinuously B) the leading strand is repli

DNA replication results in two identical daughter molecules each consisting of one old (original) strand and one newly-synthesized strand. A) True B) False

Lysosomes are membrane-bound vesicles that arise from the A) nucleus. B) mitochondria. C) endoplasmic reticulum. D) Golgi apparatus. E) cell membrane.

Which of the following properties of water helps move water to the tops of trees? a. high specific heat of vaporization b. adhesion c. high solubility d. high surface tension e. lower density as a sol

Which of the following is not a type of intermolecular force of attraction? a. covalent bond b. London dispersion force c. dipole dipole interaction d. hydrogen bond e. hydrophobic interaction

What is the primary function of the myelin sheath? a. to supply nutrients to the axon b. to carry wastes from the axon c. to increase the speed at which nerve impulses travel d. to conduct active tran

Which of the following does a buffer comprise? a. a strong acid only b. a weak base only c. a strong acid and a strong base d. a weak acid and a weak base e. an alcohol and a base

What makes it possible for an impulse to move from one neuron to an adjacent neuron? a. The axon of one neuron always touches the axon of the adjacent neuron. b. Dendrites of one neuron always touch t

Which of the following polysaccharides contains morea1 6 glycosidic linkages? a. amylose b. glycogen c. cellulose d. chitin e. amylopectin