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?

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#Question id: 2682

#Unit 2. Cellular Organization

DNA fingerprinting recognizes the differences in

TLS Online TPP Program

#Question id: 24518

#Unit 10. Ecological Principles

Some nonnative parasites are introduced deliberately for the biological control of pests, which of the following are necessary attributes of a good agent of biological control?

a. low rate of increase relative to the host’s

b. Good dispersal ability

c. High searching capacity for hosts

d. Minimal time lag effects

e. Maximal time lag effect

f. General adaptability to the environment

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#Question id: 3412

#Unit 11. Evolution and Behavior

What will be frequency of inbreeding coefficient between G and H?

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#Question id: 15658

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

Next, you isolate a third mutant, MelC–, which gives constitutive melibiase expression. The MelC– mutation is closely linked to Mel1 and MelB–. Genetic tests of the MelC– mutation yield the following:

 

As above, classify the MelC– mutation in terms of its basic genetic properties and explain how you arrived at your conclusions.

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#Question id: 11145

#Unit 7. System Physiology – Animal

Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.