Q1: Which domains contain unicellular organisms?Q2: Which domains contain *many* multicellular organisms? A: Bacteria B: Archaea C: Eucaryota D: A&B E: A&B&C
Q3: Which of these is NOT found in both morphological cell types?? A) phospholipid membraneB) DNAC) ProteinsD) Nucleus
Prokaryotes: Major Characteristics • No nucleus: – Nucleoid – DNA is circular; plasmids • Cell wall peptidoglycan • Simple cytoskeleton • Some have flagella and fimbriae • Simple organelles – Photosynthesis – storage
Eukaryotes: Major Characteristics • Nucleus for DNA storage • Many Compartment- alized organelles – Benefits? • Complex cytoskeleton • Large differences between various kingdoms (animals/plants/ fungi/“protists”)
Nucleus • DNA storage – chromosomes • Nuclear Envelope – 2 phospholipid bilayers – Pores • DNA transcribed to mRNA • Nucleolus – Ribosome biogenesis
Ribosomes • Translate information on mRNA into amino acids • DNA-> RNA -> Proteins • Large and small subunit – Protein & rRNA • Free-floating or attached to rough ER.
Mitochondria ATP • Produces ATP • Double membrane • Contains separate • DNA • ribosomes
Q4: You are studying an unknown cell type and so far, you have found out that it contains DNA, ribosomes, and a cell membrane. Based on this information you….Q5: You later find that it also contains mitochondria. Based on this information you….
The Endomembrane System • Nuclear envelope • Endoplasmic Reticulum (Rough and Smooth) • Golgi Apparatus • Vesicles • Lysosomes • Peroxisomes
Endoplasmic Reticulum (ER) • Rough ER – Ribosomes release proteins into the lumen. – Folding, processing and packaging of proteins for export • Smooth ER – Enzymes for lipid synthesis and/or degradation
Golgi Apparatus • Protein Receiving, packaging, and shipping organelle.
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- Fall '13
- Cell Evolution