Question

Vectors are
a. molecules that degrade
nucleic acids
b. molecules that help in
replication
c. molecules that are able to
covalently bond to and
carry foreign DNA into cells
d. molecules that protect host
cells from invasion by
foreign DNA

Answer 1

Answer:

At a chemical synapse, one neuron releases neurotransmitter molecules into a small space (the synaptic cleft) that is adjacent to another neuron. The neurotransmitters are contained within small sacs called synaptic vesicles, and are released into the synaptic cleft by exocytosis.

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