Chapter_3_Cell_Structure_and_Function_spr09

Chapter_3_Cell_Structure_and_Function_spr09 - Chapter 3...

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Chapter 3 Cell Structure and Function Basic cellular structures: 1. 2. 3. 4. ribosomes- 5. ________________________- found in plants & most prokaryotes; not in animals Two types of cells: 1. Prokaryote simpler lack Bacteria & Archaea 2. Eukaryote larger & more complex __________________________________ (nucleus, chloroplast, mitochondria, etc) algae, fungi, protozoa, plants, animals Viruses Non- Reproduce only Lack many characteristics of Ex. HIV virus, Rhinoviruses (colds) Arrangement of DNA in Microbial Cells genome - a cell's DNA is arranged to form
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Prokaryotes - have a Eukaryotes - _____________________________________ chromosomes Nucleus - membrane-enclosed structure that contains the chromosomes – found in eukaryotes Nucleoid - The Bacterial Cell Cytoplasm surrounded by o Cytoplasm contains DNA in nucleoid Envelope has o Plus structural Bacterial cell structures cytoplasmic membrane - “fluid” selective permeability barrier made of o CM is a o Phospholipid- ______________________________________ group faces cytoplasm or periplasm ______________________________________ fatty acids line up inside membrane o Attraction of nonpolar fatty acid portions of one phospholipid layer for other layer result in ________________________________________ of cell membrane. o Integral membrane proteins- o Peripheral membrane proteins- are bound to o Cytoplasmic Membrane: Functions 1. Permeability barrier:
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a. Prevents ______________________________________ into environment. b. _______________________ (nutrients & waste products) into & out of cell Due to ______________________________________ of membrane, only water can freely diffuse through membrane Other compounds must be transported- usually by 2. Protein anchor- site of many proteins involved in 3. Energy conservation- site of generation & use of the a. Respiration Eukaryotes have mitochondria to generate In prokaryotes, b. Photosynthesis Photosynthetic eukaryotes have Photosynthetic prokaryotes carry out The Bacterial Cell Wall (aka: sacculus) o made of
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