The circulating substances that affect the hypothalamus and initiate fever are
A) Complements
B) Interferons
C) Leukotrienes
D) Lysozymes
E) Pyrogens
E) Pyrogens
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Nucleic acids have a definite polarity, or directionality. Stated another way, one end of the molecule is different from the other end. How are these ends described?
A) One end has a hydroxyl group on the 2 carbon; the other end has a hydrogen atom on the 2 carbon. B) One end contains a nitrogenous base; the other end lacks it. C) One end has an unlinked 3 carbon; the other end has an unlinked 5 carbon. D) One end has one phosphate group; the other end has two phosphate groups.
It becomes possible to predict evolutionary changes in a population after we have measured two attributes affecting the population in question. What two measures allow us to make such predictions?
What will be an ideal response?
Certain mutations in the regulator gene of the lac system in E. coli result in maximal synthesis of the Lac proteins (?-galactosidase, etc.) even in the absence of the inducer (lactose). Provide an explanation for this observation
What will be an ideal response?
How is DNA linked to the production of proteins?
A) Proteins hold the instructions on how to make DNA. B) DNA is the end point of protein production that allows cells to finish making proteins. C) DNA holds the instructions for the cells on how to make proteins. D) DNA is not linked to the production of proteins.