Cell Structure

-no nucleus -unicellular -no membrane bound organelle -0.1-5.0 micrometers

-contains nucleus -membrane bound organelle 10-100 micrometers

-Seperates contents of nucleus from the rest of the cell - fuses with inner nuclear membranes in some regions to allow ribosomes + dissolved substances through

Where ribosomes are made

-control centre of cell -stores organisms genome -transmits genetic info and stores instructions for protein synthesis

-series of flattened sacs -Provides large SA for ribosomes -folds and processes proteins

-System of membrane bound sacs -contains enzymes that catalyses reactions involving lipids- produces and processes

-fluid filled, flattened and curved sacs -processes and packages proteins and lipids -produces enzymes

-oval shaped, bound by double membrane called the envelope -inner membrane folded- called cristae with matrix on inside -contains all enzymes needed for respiration

-hollow cylinders -contains a ring of microtubules arranged at right angles to eachother -involved in cell division

-composed of two subunits -site of protein synthesis

-vesicle containing digestive enzymes bound by a single membrane

-site of chloroplasts- converts solar energy to chemical energy

Filled with water and solutes to help maintain cell stability

-strong -prevents cell from bursring when turgid

Peptidoglycan

Protective slimy layer which helps the cell retain moisture and adhere to surfaces

Circular pieces of dna which float around the bacteria

Tail like structure which rotates to move the cell

Hair-like structuree which attach to other bacteria cells

-microfilaments -intermediate filaments -microtubules

-made of actin -contract (help move cell or divide during cytokinesis) -used for support and mechanical strength -used for cell movement to keep cell shape stable

-made of a number of dif proteins -strengthens cell and stabilises tissue -anchors nucleus within cytoplasm

-made of tubulin -move organelle around cell -form spindle fibres for mitosis & meiosis -complex network determines complex shape of cell -form track motor proteins use to move organelle