Which one of the following diseases is a progressive degenerative disorder caused by destruction of dopamine-releasing neurons in the brain that coordinate muscle movement?
A) Alzheimer's disease
B) epilepsy
C) encephalitis
D) Parkinson's disease
E) rabies
D
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Signal amplification relies on:
A. increasing amounts of ligand as signal transduction proceeds. B. a sequential increase in the different components of the signal transduction pathway. C. increasing numbers of cell-surface receptors as the signal is transduced. D. increased activity of protein phosphatases.
To which of the following groups does the organism
in the above figure belong? a. diplomonads, parabasalids, trypanosomes, and euglenoids b. ciliates, dinoflagellates, and apicomplexans c. water molds, diatoms, and brown algae d. chlorophyte and charophyte algae e. none of the above
Bioremediation often requires the gain or loss of electrons as a mechanism to assist the process. Loss of electrons is known as ________
A) reduction B) bioprocessing C) oxidation D) carboxylation E) hydrolysis
In addition to their characteristic cilia, most ciliates contain two types of
A. cysts. B. wood-digesting enzymes. C. flagella. D. chloroplasts. E. nuclei.