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A dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material
Characteristic for an atomic nucleus are the number of protons and neutrons. Tha atomic nucleus is always positive.
alpha particle, He nucleus
it is a gun
The nucleus is the powerhouse of the cell; it contains the DNA and RNA and controls the rest of the cell. So yes, it is in a way like the brain.