Eukaryotic Cells

Miss Fletcher

January 2013

http://g11-biob1-2011-12.wikispaces.com/(a)+Eukaryotic+cells

2.3.1 Draw, label, annotate and identify organelles in a diagram of the ultrastructure of a liver cell.

Ribosomethe site of protein synthesis

2.3.5 State three differences between plantand animal cells.

Plant cells Animal cells

Cellulose cell wall is present Cell wall absent, cellulose in any form is also absent

Vacuoles are large and prominent Vacuoles absent and if present they are small and temporary and associated with excretion or secretion

Reserve energy source in the form of starch

Reserve energy form is glycogen

Centrioles absent but polar caps participate in cell division instead

Centrioles present

Chloroplasts present Chloroplasts absent

2.3.6 Outline two roles of extracellular components.

Plant cell wall

http://micro.magnet.fsu.edu/cells/plants/cellwall.html

• Found around all plant cells

• Composed of cellulose.• Maintains the shape of

the cell.• Provides structural

support against the force of gravity.

• Prevents excessive uptake of water by the cell

Basement membrane in the kidney

http://www2.niddk.nih.gov/NIDDKLabs/Glomerular_Disease_Primer/NormalKidney.htm

http://click4biology.info/c4b/2/cell2.3.htm#electron

• Basement membrane: a secretion formed from collagen and glycoproteins joined together by a third 'linkage' protein. Their exact composition varies form tissue to tissue.

• Support: the membrane surrounds the tissues of lines ducts. It provides structural support for the integrity of the tissue or organ. Usually found as the basal lamina or basement membrane of epithelial cells.

• Filter : The basement membrane of the kidney glomerulus provides the effective barrier for ultrafiltration

2.3.6 Outline two roles of extracellular components.