Epidemiologists can use (direct immunofluorescent/immunochromatographic/serological) assays to track infectious disease.

Fill in the blank(s) with the appropriate word(s).


serological

Biology & Microbiology

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Densely staining regions of highly compacted chromatin that are generally not transcribed are:a

heterochromatin. b. homochromatin. c. histone-dependent chromatin. d. primary chromatin. e. heterochromatinization

Biology & Microbiology

A person who cannot make enough of the plasma protein ________ might have problems with water balance

Fill in the blank(s) with correct word

Biology & Microbiology

MicroRNAs (miRNAs)

A. are long RNA molecules. B. are cut by an enzyme called transcriptase. C. silence the expression of specific mRNAs. D. are found only in animals.

Biology & Microbiology

The outside of a neuron is positively charged at resting potential. Why do K+ ions leave the cell when K+ channels open during an action potential?

A. Negatively charged proteins leave the cell at the onset of the action potential. B. The diffusion gradient is the only factor that affects ion movement. C. K+ ions are actively pumped out by the sodium-potassium pump acting in reverse. D. Voltage-gated K+ channels open when membrane potential reaches +50 mV during the depolarization phase. The diffusion gradient and electrical force cooperate to drive K+ ions out of the cell.

Biology & Microbiology