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Chapter 4 CELLS

Across
Surrounds plasma membrane
Dark-staining region of the nucleus
Fills interior of cell
Water-soluble
Energy-capturing centers; surrounded by 2 membranes
Cell that lacks a nucleus
First described cells in 1665
Forms boundary of the cell
Water-insoluble
Membrane-bounded storage centers
Cells are made of these
Hollow tubes made up of the protein tublin
Analysis of tissues using microscopy
Down
Long, threadlike structure of protein fibers that extend from cell surface
Made of organelles
Cellular powerhouses
Has a nucleus and has internal membrane-bounded compartments
States importance of cells to life
Short structure aiding in exchanging genetic information between cells
Membrane-bounded compartment for DNA