#Question id: 2411
#Unit 2. Cellular Organization
Three major groups of filament systems comprising the cytoskeleton are all composed of polymers of assembled subunits, which vary in thickness when assembled. Which is the correct order, from smallest to largest, of the filament systems?
#Question id: 1756
#Unit 4. Cell Communication and Cell Signaling
Which of the following is the cytokine that is most involved in the class switch to IgE production?
#Question id: 375
#Unit 1. Molecules and their Interaction Relevant to Biology
The aqueous solution with the lowest pH is:
#Question id: 5952
#General Aptitude
If a 4-digit year is chosen randomly, what is the probability that it is a leap year?
#Question id: 11211
#Unit 7. System Physiology – Animal
The following steps refer to various stages in transmission at a chemical synapse.
1. Neurotransmitter binds with receptors associated with the postsynaptic membrane.
2. Calcium ions rush into neuron's cytoplasm.
3. An action potential depolarizes the membrane of the presynaptic axon terminal.
4. The ligand-gated ion channels open.
5. The synaptic vesicles release neurotransmitter into the synaptic cleft.
Which sequence of events is correct?