Title: Biology 10/17/06 Objectives: Class Topics 1/16/2019 Title: Biology 10/17/06 Objectives: To learn about microscopes and scientists that discovered cells and cell parts. Class Topics Hand in lab Measuring with a Microscope before the bell rings. 1A – also hand in “Measurement W.S” Review Chapter 3 Quiz 1 Notes: Eukaryotic cells Cell membrane Organelles “If you make people think they’re thinking, they’ll love you; but if you really make them think, they’ll hate you.” Don Marquis Wednesday, January 16, 2019 6:59 PM

Class Assignments 1A only – Measurement W.S. 10/17/06 1/16/2019 Class Assignments What By When 1A only – Measurement W.S. 10/17/06 Measuring with a microscope 10/17/06 Read 62-66 10/20/06 W.S. 3.3 (DR/Quiz) 10/20/06 Due this class period Due next class period Due in the future

Grade Sheet 1A – SR p. 61 - 5 pts 3A SR p. 42 – 6 pts 1/16/2019 Grade Sheet 1A – SR p. 61 - 5 pts 3A SR p. 42 – 6 pts 2A – Measurement W.S. – 10 pts 4A – SR p. 47 – 5 pts

All cells have… Cell membrane – around outside 1/16/2019 All cells have… Cell membrane – around outside Cytoplasm – fluid of cell Cytoskeleton – structure of cell Ribosomes – make protein DNA – used to make protein Some lose these after time due to specialization

1/16/2019 Eukaryote Organism that has cells with nuclei and internal compartments (membrane bound organelles) ex. animals, fungi, plants, protists Internal membranes connect organelles Vesicles Small cavity to move materials around cell

Cytoskeleton Microtubules (tubulin) microfilaments (actin) 1/16/2019 Cytoskeleton Microtubules (tubulin) thick strands of protein Used to move RNA microfilaments (actin) thin strands of protein Change shape of cell

Cell Membrane Semipermeable (selectively permeable) 1/16/2019 Cell Membrane Semipermeable (selectively permeable) Function (lipid bilayer) Encloses cell Allows material to enter and leave Small polar and nonpolar particles Phospholipid Polar head & nonpolar tail Lipid bilayer Two layers of phospholipids

1/16/2019 Phospholipid Bilayer Hydrophilic Hydrophobic

Membrane Proteins Marker proteins Receptor proteins Enzymes 1/16/2019 Membrane Proteins Marker proteins Advertise cell type Carbohydrates attached Receptor proteins Bind to specific substances (signal molecules) Cause a reaction to occur within the cell Enzymes Catalyze reactions Transport proteins Move larger substances in and out

Functions of the cell membrane 1/16/2019 Functions of the cell membrane Enclose cell Allow transport of materials Small polar and nonpolar Identify the cell Allow transport of larger materials To receive signal molecules To catalyze reactions

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Control Center or main office 1/16/2019 Nucleus Function: to regulate the production of proteins (control center of the cell)!!!! Contains the cell’s DNA Most prominent structure in the cell Control Center or main office Cell as a factory link

Parts of the nucleus Chromatin - DNA uncoiled (w/ protein) 1/16/2019 Parts of the nucleus Chromatin - DNA uncoiled (w/ protein) Found when the cell IS NOT dividing Chromosomes - DNA coiled or condensed - rod shaped Found when the cell IS dividing Nuclear envelope - membrane around the nucleus - has holes called nuclear pores Nucleolus – where the ribosomes are formed

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Ribosomes Site of protein synthesis Made of RNA and protein 1/16/2019 Ribosomes Site of protein synthesis Made of RNA and protein Found in cytoplasm and on ER Workers

1/16/2019 Ribosomes Protein synthesis