REVIEW QUESTIONS What is a prokaryote?No membrane bound organelles What is an example of a prokaryote? Bacteria What are the 3 parts of the cell theory? All organisms composed of cells - cell is basic unit of living things - all cells from pre-existing cells What is a eukaryote?Has membrane bound organelles

REVIEW CONTINUED: What are the functions of the cell membrane? Protect the cell – regulates what enters & leaves the cell What is the process of maintaining the cells environment? HOMEOSTASIS What is the property of a cell membrane that only allows certain things in or out? SELECTIVE PERMEABILITY What is the cell membrane’s structure? PHOSPHOLIPID BILAYER What is the outer boundary of a plant cell? CELL WALL

Which statement about the cell membrane is not true? A – it helps give the cell its shape B – it is found only in animal cells C – it provides some protection for the cell D – it helps maintain homeostasis

PARTS OF THE CELL – CELL ORGANELLES Nucleus control center of the cell – contains DNA – gives directions for making proteins

Nucleolus inside nucleus – makes ribosomes

Chromatin inside nucleus – strands of DNA

Cytoplasm clear, gelatinous fluid inside the cell gives the cell its shape holds or “suspends” the cell’s organelles

Ribosomes site of protein synthesis (where protein is made) can be free floating or attached to endoplasmic reticulum

Endoplasmic Reticulum large “workspace” inside cell – has “folds” for greater surface area 2 kinds of ER1.Rough ER: has ribosomes attached to make protein 2. Smooth ER: no ribosomes attached – other biochemical activities here

Golgi Apparatus sorts proteins to be sent to correct destination flattened system of membranes – (look like pancakes)

Vacuoles function to store materials plants have a LARGE vacuole – animal cells have smaller vacuoles TYPICAL ANIMAL CELLTYPICAL PLANT CELL

Lysosome contains digestive enzymes digests/destroys excess food, viruses, bacteria also can destroy the cell itself if needed

Plastids found in PLANTS ONLY used for storage EXAMPLE: Chloroplasts store energy/food has “folds” for greater surface area

Mitochondria produces energy for the cell has “folds” for greater surface area each type of cell has a different amount of these

Cytoskeleton cell support structure – gives a “framework” to the cell composed of MICROTUBULES & MICROFILAMENTS

Cilia function in movement of the cell or line the cell to move other things cilia are short, hair like – move in waves

Flagella functions in movement of the cell flagella are longer – move like a whip

ANIMAL CELL – PLANT CELL COMPARISON PLANT CELL ONLYPLANT & ANIMAL CELLANIMAL CELL ONLY CELL WALL PLASTIDS (EX: chloroplast, leucoplast) LARGE VACUOLE CENTRIOLE ALL OTHER ORGANELLES