6 CHARACTERISTICS • Required for all living things: • Cells • DNA • Energy • Grow • Reproduce • Respond
CELL THEORY • All cells come from cells. • Cells are the basic unit of all living things. • All living things are made of cells.
CELLS • Cells are individual units (smallest living unit) surrounded by a membrane. • Specialized for the job it has. • Cells work together to make up organisms (you).
DNA Our genetic code/ Blueprints for life. In ALL Cells. Specific match-up of 4 bases: G = C A = T
CHROMATIN Long strands of DNA ie: spaghetti CHROMOSOME Condensed DNA ie: macaroni -anyone hungry? DNA
BACTERIA cell Single-celled organisms Reproduces asexually. Can be +, -, or neutral. Usually spheres, rods or spirals. PROKARYOTIC
EUBACTERIA -most common -many varieties ie: yogurt, cheese ARCHAEBACTERIA -rare, lives where nothing else can ie: salt flats, depths of ocean, old faithful BACTERIA
PROKARYOTIC -no membrane-covered organelles. (DNA & ribosomes.) ie: bacteria EUKARYOTIC -has membrane-covered organelles. ie: plant & animal TYPES OF CELLS
Cells that have many partsinside to carry out different jobs. Usually in multi-celled organisms. EUKARYOTIC CELLS
CELL PARTS -Separates from environment. -Allows certain things through.
Jell-substance between membrane & nucleus. • Cushions organelles.
ORGANELLES..? • Organelles are parts of the cell that have special jobs to do within the cell. -similar to jobs that people have to run a city. • Organelles look different because of their specific job.
LET’S GET STARTED… NUCLEUS -Boss; directs all w/in the cell. -holds DNA. -has nucleolus (mini-me) that makes ribosomes.
Small & many. Non-membrane organelles. Make proteins. Made inside of nucleus. Pro & Euk cells. RIBOSOMES
E.R. • ENDOPLASMIC RETICULUM • Internal delivery system. • Tubes & passageways to deliver materials throughout the cell. • SMOOTH- deliver lipids • ROUGH- deliver proteins
-Powerhouse; creates energy for cell. -double-membrane for surface area. MITOCHONDRIA
External delivery service. Package & deliver outside of cell. VESICLES- pinched off package. GOLGI BODIES
STORAGE UNIT 1 large in plants Few small in some animal cells. VACUOLE
REVIEW COMMON PARTS • Cell membrane-barrier • Nucleus- boss • Ribosomes- producer • E.R.- Internal delivery • Golgi Bodies- External delivery • Mitochondria- powerhouse. • Vacuole- storage.
CHLOROPLAST- creates food for cell. Double-membrane for surface area. PLANT CELL ONLY
CELL WALL- -gives structure & support. -nonliving -made of cellulose. PLANT CELL ONLY
ANIMAL CELL ONLY LYSOSOME- clean upcrew • Gets rid of waste & dead parts. • Enzyme to break down particles.
CELLS! -good to have.