Most automated nucleotide sequencing machines detect bands by ________.
A. autoradiography
B. measuring incorporated radioactivity
C. laser induced fluorescence
D. sizing DNA fragments produced by base specific chemical cleavage reactions
Answer: C
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Aldosterone stimulates the reabsorption of sodium ions here
A) glomerular capsule B) proximal convoluted tubule C) loop of the nephron D) distal convoluted tubule and collecting duct
Which of the following is the advantage that plants in arid habitats experience when they keep their stoma closed during hot daytime hours?
A. It brings minerals up the plant. B. It gives plants a needed rest. C. It prevents sugar transport to the guard cells. D. It helps to conserve water. E. It prevents loss of CO2.
After repeated exposure to foreign material, nonspecific immunity _______.
A. begins to react less strongly B. involves a wider range of cells and mediators C. reacts more quickly and intensely D. continues to react the same way
When incubated at 45.5° C, E. coli broth is selective for E. coli.
A) True B) False