CELL LAB REVIEW. ALL EUKARYOTIC CELLS LEAF; CORK; ONION; SKIN CELLS FROM CHEEK AND ARM What organelles are visible with the light microscope? How is each.

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Presentation transcript:

CELL LAB REVIEW

ALL EUKARYOTIC CELLS LEAF; CORK; ONION; SKIN CELLS FROM CHEEK AND ARM What organelles are visible with the light microscope? How is each cell’s structure related to its function?

PLANT CELL LEAF CORK ONION What organelles do they have in common? What organelles are different? How are the similarities and differences in STRUCTURE related to the FUNCTION of these plant parts?

Elodea 100X There are 2 layers! Use fine adjustment to focus on just 1.

cell wall chloroplast cytoplasm Where is the cell membrane?

elodea 400X vacuole

?

cyclosis

Onion 40X ?

Onion 100X

Onion 400X

BULB – fleshy leaves on a short stem Carbohydrate storage LEAF photosynthesis

Onion

CORK 400X CELL WALL

CORK 400X CELL WALL

Holes are empty Only cell wall remains Reminded Robert Hooke of small rooms or CELLS

ANIMAL CELL CHEEK CELLS SKIN CELLS How are the like each other? How different? How are they like the plant cells? How are they different from plant cells?

CHEEK CELLS unstained

CHEEK CELLS 40x

CHEEK CELLS 100x

CHEEK CELLS 400x

cytoplasm cell membrane nucleus

CHEEK CELLS 400x THESE CELLS ARE ALIVE

SORRY NO PHOTO FOR YOUR SKIN CELL SLIDE! Function: To cover and protect a surface These are dead cells – heavily keratinized (keratin is a protein) Like “floor tiles”

SEM OF SKIN CELLS

PROKARYTOTIC CELLS What organelles do they possess? Compare them to eukaryotes.

E. coli X1000 Staphlococcus aureus X400 unknown

DIAMETER TYPICAL PROKARYOTE μm TYPICAL EUKARYTOE μm

RIBOSOME Prokaryote – 20 nm Eukaryote – nm MEMBRANE WIDTH 7-10 nm NUCLEUS DIAMETER 0.01 nm

LIES MY TEXT BOOK TOLD ME Are animal cells spheres? Are plant cells box-shaped? Are cells colorful? What determines the shape of any cell type?

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