Update Unit 2: Biology.md

Grade 10/Science/SNC2DZ/Unit 2: Biology.md

@@ -103,4 +103,42 @@ A person contains roughly 100 trillion cells
 ## Mitochondrion
  - **Plural is "mitochondria"**
  - Contains an inner and outer membrane
- - Processes glucose + oxygen gas to form carbon dioxide + adenosine triphosphate (ATP)
+ - Processes glucose + oxygen gas to form carbon dioxide + adenosine triphosphate (ATP)
+    - ATP allows proteins to do things (e.g., spend 1 ATP break 1 molecule)
+    - ATP cannot be stored
+ - Mitochondria have their own DNA
+
+## Cytoskeleton
+ - Made of protein filaments
+ - Maintains and changes cell structure, much like a human skeleton + muscular system
+    - Moves cells
+ - Chemicals can travel along cytoskeleton, e.g., organelles, vesicles, etc.
+
+## Organelles specific to animal cells
+### Centrioles and centrosomes
+ - Made of same protein as cytoskeleton
+ - A centrosome is a pair of centrioles
+ - Very important to cell division
+    - Split chromosomes apart after DNA has been replicated into daughter cells
+    - Helps regulate cell division
+ - Create cilia and flagella (e.g., small hair-like things that swipe dirt out of lungs and tails of sperm, respectively)
+
+### Lysosomes
+
+## Organelles specific to plant cells
+### Cell wall
+ - Provides structure and prevents cell rupture
+ - Can be tough, flexible, and/or rigid
+ - Permeable to small molecules
+ - Made of cellulose (type of sugar)
+ - Also present in most bacteria, fungi, and protists
+
+### Central vacuole
+ - Extremely large, may take up to 90% of volume in cell
+ - Contains water
+ - Maintains turgor pressure against cell wall (pushes against cell wall in all directions)
+
+### Chloroplasts
+ - Conduct photosynthesis
+ - All chlorophyll is located in chloroplasts
+ - Looks green