X1011581001-00102-23279</DOCNO> Lecture Notes for Cell Biology Lecture Notes for Cell Biology I Cellular Biology A) Cell = fundamental unit of biology, building block of all organisms B) Organisms range from unicellular to multicellular 1) Unicellular: 1 cell = 1 organism 2) Multicellular: 1036 cells = 1 organism, different cells for different functions, exhibit division of labor C) Diversity of cells 1) Different types of unicellular organisms (Paramecium and Amoeba) 2) Different types of cells in multicellular organisms (muscle, skeletal, immune, lungs, epithelium, etc...) D) Classification of cells 1) Two major groups - Prokaryotes and Eukaryotes 2) Differences: Prokaryotes - smaller size, simple structure (no membrane bound organelles, no nucleus, DNA in a single strand), primitive (old group of organisms, nearest relatives of first living organisms) E) Structural and functional differences between Prokaryotes and Eukaryotes Function Eukaryotes Prokaryotes Isolation (plants and animals ) cell wall (plants) phospholipid bilayer cell membrane with proteins same but minor chemical differences Support cytoskeleton none Energy (production) chloroplasts (plants) mitochondrion (Krebs cycle) chlorophyll but no covering none (fermentation) Energy (digestion) lysosomes (aging??)
(Organisms; range; from unicellular; to multicellular 1) (phospholipid bilayer cell membrane with proteins same but minor chemical differences Support cytoskeleton none Energy (production) chloroplasts (plants) mitochondrion (Krebs cycle) chlorophyll; lysosomes; )
Organisms phospholipid bilayer cell membrane with proteins same but minor chemical differences Support cytoskeleton none Energy (production) chloroplasts (plants) mitochondrion (Krebs cycle) chlorophyll
range lysosomes
from unicellular to multicellular 1