Atom molecule electrons carbon is the only element that can form so many different compounds because each carbon can form four chemical bonds to other atoms is just the right size small size to fit in comfortably as parts of very large molecules
The nuclues is the control center of the cell
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(B) They Bind to receptor proteins on the surface of the postsynaptic neuron.
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In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
