September 19, 2013

1. September 19, 2013 • Turn in your Reinforcement 3.1/3.3 to in-box • Grab a Biology textbook from the shelf • Study! Quiz is on sections 1.1, 1.3, and 1.5 • Look at the vocab in 1.3 carefully • A hypothesis is a proposed answer for a scientific question. • A theory is a proposed explanation for a wide range of observations and experimental results that is supported by a wide range of evidence. • It is NOT a guess or an assumption.

2. Quiz • Make sure your table is clear of everything except a writing utensil and manila folders. • Prop the manila folders between yourself and your neighbors for privacy. • You have 15 minutes to complete the quiz. • When complete, flip the quiz paper face down. • Good luck!

3. Binder Check • Seven tabs: • Seatwork • Homework • Vocab -> PowerNotes -> Reinforcement • Classwork • Quizzes/Tests • Handouts • EOC Practice • Paper

4. Organelle Foldable • Fold your paper in half. • On one side, write your name. • On the other side, write: • The three principles of cell theory: • All organisms are made of cells. • All existing cells are produced by other cells. • The cell is the most basic unit of life.

5. Organelle Foldable

6. Organelle Foldable • Cell membrane • Cytoskeleton • Cell wall • Nucleus • Endoplasmic reticulum • Ribosome • Golgi apparatus • Vesicle & Vacuole • Mitochondria • Chloroplast • Lysosome • Centriole

7. Cell Membrane • Structure: • Phospholipid Bilayer • Receptor proteins & other molecules • Function: • Boundary between inside/outside of cell • Controls passage of materials

8. Cytoskeleton • Structure: • Network of protein fibers • Function: • Structures & supports cell shape • Aids in cell division & movement

9. Cell Wall • Structure: • Rigid layers of cellulose or chitin • Function: • Provides rigid support to plants, algae, fungi and bacteria cells

10. Nucleus • Structure: • Nuclear membrane • Nucleolus • Chromosomes • Function: • Stores most DNA (genetic information)

11. EndoplasmicReticulum • Structure: • Maze-like structure; Interior is called lumen • Rough (w/ ribosomes) and smooth ER (w/o) • Function: • Produces proteins (rough ER) and lipids (smooth ER)

12. Ribosome • Structure: • Made of proteins and RNA • Some attached to ER, some floating in cytoplasm • Function: • Make proteins

13. Golgi apparatus • Structure: • Layered stacks of membrane-enclosed space • Function: • Processes, sorts, packages, and delivers proteins

14. Vesicle & Vacuole • Structure: • Small, membrane-bound sacs • Vacuoles filled with fluid • Function: • Transport (vesicle) & storage (vacuole) of materials inside cells

15. Mitochondria • Structure: • Bean-shaped • Double layer of membrane • Function: • Converts food into energy using cellular respiration

16. Chloroplast • Structure: • Outer and inner membranes • Contain stacks of disc-shaped sacs called thylakoids • Function: • Convert solar energy to chemical energy

17. Lysosome • Structure: • Membrane sac filled with digestive enzymes • Function: • Digests/breaks down materials • Recycles worn-out cell parts

18. Centriole • Structure: • Cylinder-shaped • Made of microtubules • Found in pairs • Function: • Help coordinate cell division

19. Homework • Use your textbook to complete organelle drawings on inside of third tab of foldable. • Sections 3.4 & 3.5: • Vocab • PowerNotes • Reinforcement

20. Exit Question • What are two organelles that plant cells have that animal cells do not?