Cells

What do all cells have?

What do all cells have?

genetic info, cytoplasm & cell (plasma) membrane

Prokaryotic cells

no nucleus; DNA floats around, less complex, unicellular, ribosomes may be present for making proteins, may have a few other parts: cell wall, flagella, just bacteria

Eukaryotic Cells

has a organized nucleus with DNA inside, more complex, unicellular or multicellular, organelles: plants, animals, fungi, etc. …

Nuclear matrix

network of proteins that maintain shape of nucleus

nuclear membrane (envelope)

encloses cell DNA

nuclear pores

tiny holes in membrane that allow passage of other materials

nucleolus

location where ribosomes are made and partially put together

Chromatin

combination of DNA & protein

chromosomes

form from coiled chromatin when cell is ready to divide

cytoplasm

contains all organelles as well as cytosol

cytosol

gelatin-like watery fluid that has dissolved salts, minerals, & organic molecules

selectively permeable

allows some things to pass through and others not

lipid bilayer

the two layers of cell membrane