Following a meal glucose must move from the gut lumen where there is a high glucose concentration into the intestinal cell where there is a relatively low level of glucose. This movement is called
A. passive diffusion.
B. facilitated diffusion.
C. active transport.
D. endocytosis.
E. exocytosis.
B. facilitated diffusion.
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The disinfectant action of phenol and phenolic derivatives mainly is due to
A. extraction of lipids from membranes. B. oxidation of disulfide bonds in proteins. C. membrane damage and protein denaturation. D. damage to nucleic acids and proteins caused by free radicals. E. its inherent detergent action.
Sympatric speciation often occurs in animals through polyploidy
a. True b. False
The electrons that are released by the splitting of H2O molecules during photosynthesis ultimately end up in: -glucose.
-ATP. -H2O -NADPH. -rubisco.
An enzyme that has been isolated from retroviruses and is used to generate cDNA is
A. reverse endonuclease. B. recombinant RNase. C. RNA polymerase. D. transverse ligase. E. reverse transcriptase.