The location on a bacterial chromosome where DNA replication begins is ________, and the binding of ________ opens up the double helix
a. oriC / DnaA
b. oriC / DNA gyrase
c. oriG / DnaA
d. oriG / DNA gyrase
Answer: A
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Which statement best describes what ultimately happens to the chemical energy that is not converted to new biomass in the process of energy transfer between trophic levels in an ecosystem?
A) It is undigested and winds up in the feces and is not passed on to higher trophic levels. B) It is used by organisms to maintain their life processes through the reactions of cellular respiration. C) Heat produced by cellular respiration is used by heterotrophs for thermoregulation. D) It is eliminated as feces or is dissipated into space as heat, consistent with the second law of thermodynamics. E) It is recycled by decomposers to smaller and smaller forms until it finally breaks down to form soil.
Single-celled eukaryotic organisms that lack chlorophyll are called
A. Algae. B. Protozoa. C. Chlorophyta. D. Salmonella.
How many thoracic vertebrae are in the spinal column?
a. 5 b. 7 c. 12 d. 4 e. 15
Which of the following genes of the pGLO plasmid allow it to grow in the presence of the selective agent used in this lab?
A) bla gene B) GFP gene C) araC gene