Fever develops when ____ stimulate the brain to release prostaglandins
a. cytokines
b. histamines
c. interferons
d. complement
e. histamines
A
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If one were to double the amount of enzyme in a reaction with an initial ?G of -5 kcal/mole, what would the ?G be?
A. +10 kcal/mole
B. -20 kcal/mole
C. +5 kcal/mole
D. -10 kcal/mole
E. -5 kcal/mole
Consider the following genetic study involving two autosomal genes. One of these, eye colour, has the dominant allele (R) for red eye colour and the recessive allele (r) for yellow eye colour. The other has the dominant allele (T) leading to paws with thumbs, while the recessive allele (t) codes for paws without thumbs. Presuming no linkage between the genes, what should be the phenotype ratio of the offspring produced by a testcross (RrTt ? rrtt)?
a. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs b. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs c. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs d. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thum
Organisms that evolved the ability to use H2O as a donor of electrons and hydrogen for the photosynthesis conversion of CO2 to organic compounds radically changed Earth by producing
a. sugar. b. cellulose. c. O2. d. H2.
How would the results be different if this organism was Salmonella?
a. It would be a rod. b. It would not ferment lactose. c. It would produce hydrogen sulfide. d. It would not tolerate oxygen.