Which is a major function of the plasma membrane?
A. storing calcium ions
B. storing organic chemicals for metabolism
C. providing genetic information
D. generating ATP
E. regulating the passage of molecules into and out of the cell
E
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Which compound has the lowest molecular weight?
A) Ammonia B) Urea C) Uric acid D) Protein
At any level of production, ceftiofur is more economical than penicillin
Indicate whether the statement is true or false
Select the first step for synaptic signaling when the action potential arrives at the axon terminal of a presynaptic neuron
a. A neurotransmitter is released by exocytosis. b. Calcium flows into the synaptic knob. c. The neurotransmitter combines with a protein receptor on the subsynaptic membrane. d. The permeability is altered in a postsynaptic neuron. e. The axon terminal depolarizes.
In which structure are subunits of ribosomes manufactured?
A. Peroxisomes B. Endoplasmic reticulum C. Flagellum D. Golgi apparatus E. Nucleolus