What does it mean when we say that dna replication is semiconservative? a. each old strand is used as a template for a new strand for the daughter cell. b. the daughter cell receives the old dna while the parent cell gets a new copy. c. the daughter cell receives the new copy while the parent cell keeps the old dna. d. nothing in the dna is ever changed.

This class has taught you that the use of science and medicine in practical ways has become an international endeavor. one of the greatest examples of an international science accomplishment is which allows the profiling of human dna, useful not only to science but also medicine. a) forensic science b) the fbi c) the human genome project d) bioterrorism

In the practice of science, this type of reasoning is used to develop explanations.

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit. there is a precise compatibility between the active site and the lactose molecule. specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed. reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.