What is the metabolic abnormality that underlies the characteristic symptoms of diabetes mellitus, such as frequent urination?
A) a failure of the kidney tubules to reabsorb enough glucose from the urine
B) a failure of the gastrointestinal epithelium to absorb enough glucose from food
C) an inability of the body's cells to retain glucose they have absorbed from the blood
D) an inability of the body's cells to absorb enough glucose from the blood
D
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A nucleotide consists of
A) three sugars for every phosphate. B) three phosphates for every sugar. C) one deoxyribose sugar, one nitrogenous base, and one phosphate group. D) three DNA bases.
The reaction that takes place in the fuel cell of the Alcosensor converts ethyl alcohol to ___ ___.
Fill in the blank(s) with the appropriate word(s).
In a certain breed of chicken, an incompletely dominant gene controls color. The homozygous black (BB), when crossed with the homozygous splashed-white (bb), produces an intermediate gray color pattern referred to as blue. A second gene controls the shape of the comb. The dominant allele (R) produces rose, whereas the recessive allele (r) produces single. A cross between a true-breeding black with a single comb and a true-breeding splashed-white with a rose comb will produce a total of _______ different phenotypes in the F2 generation.
Fill in the blank(s) with the appropriate word(s).
When referring to attenuation in regulation of the trp operon, it would be safe to say that when there are high levels of tryptophan available to the organism, ________
A) translational termination is likely B) the trp operon is being transcribed at relatively high levels C) tryptophan is inactivating the repressor protein D) ribosomes are stalling during translation of the attenuator region E) transcriptional termination is likely