Catalase
(a) is an enzyme found in most cells, including liver.
(b) catalyzes the production of hydrogen peroxide.
(c) has as its substrate water and oxygen gas.
(d) is a substance that encourages the growth of microorganisms.
(a) is an enzyme found in most cells, including liver.
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To generate a knockin mouse, a scientist introduces to ES cells a construct with a mutant exon and within an adjacent intron, loxP sites flanking a neomycin resistance gene. What event will occur next?
A) Homologous recombination between the mutant DNA and the corresponding gene in the mouse genome. B) Recombination between the loxP sites. C) Transplantation of cells into host blastocyst. D) Crossing of heterozygous mice to a Cre-expressing strain.
The pancreas is an organ that regulates blood glucose levels. When glucose levels rise above normal, the pancreas
releases insulin to lower blood glucose levels. This is an example of ____. a. evolution b. mutation c. immunity d. homeostasis e. variability
The majority of oxygen present within the blood is
A) bound to hemoglobin within the plasma. B) bound to plasma proteins. C) dissolved within the plasma. D) in the plasma as HCO3-. E) bound to hemoglobin in red blood cells.
All sensory information, with the exception of olfaction, must pass though the ________ as it travels to the cerebral cortex
A) cerebellum B) thalamus C) amygdala D) hypothalamus E) reticular formation