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Unformatted text preview: basal bodies Organelles
Nucleus= lrg organelle; houses genetic material of cell
• Single (anuclear) –vs- multinucleate
• Nuclear envelope, nuclear pores, nucleoplasm, chromatin
(‘threads’ of DNA & protein), & nucleoli (ribosome synthesis)
(‘threads’ Endoplasmic reticulum (ER)= ‘little network w/in cytoplasm’
• 2 portion of the ER- rough & smooth ER
• Presence/absence of ribosomes embedded in membrane
Presence/absence ribosomes • Interconnected channels (cisterinae)
• Rough ER= ‘‘stacks’ of flattened sac w/ ribosomes; continuous
w/ nuclear envelope of nucleus
• Smooth ER= llacks ribosomes; channels become more tubular
& branched • Makes steroids & lipids, phospholipids for cell membranes,
& proteins (rough ER); detoxifies alcohol & drugs, stores
Ca2+ (smooth ER)
Ca2+ Organelles (cont.)
Ribosomes= granules of protein + RNA
• Located in nucleoli & cytosol, on surface of rough ER &
• Read mRNA & then synthesizes proteins
• Remember transcription & translation?!
Remember transcription translation Golgi complex= small system of cisternae that make carb’s &
modify (‘finish’) proteins & glycoproteins
• ‘stack of pita bread’; ~6 flattened sacs that modify proteins
synthesized in ER…packages them in golgi vesicles
• G.vesicles ‘pinch off’ membrane of g.complex
• Some travel towards p.membrane & fuse w/ cell membrane
Some form lysosome...
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This note was uploaded on 01/12/2014 for the course ZOO 250 taught by Professor Staff during the Fall '08 term at S.E. Louisiana.
- Fall '08