CHAPTER 3: Question With Correct
Answer New Update
COMPOSITE CELL: - Answer -✔✔- Shows components found in most cells.
3 MAJOR PARTS OF A CELL: - Answer -✔✔- 1. Nucleus
2. Cytoplasm
3. Cell membrane - outer bound area
CELL (PLASMA) MEMBRANE: - Answer -✔✔- - Outer boundary of cell
- Regulates entry and exit of substances meaning it's selectively permeable and makes
decisions on what goes in the cell.
- Consist mainly of lipids.
- Bilayer of phospholipids, cholesterol, and proteins with some carbohydrates.
PERIPHERAL PROTEINS: - Answer -✔✔- - Can stand in the way.
- Outside or inside of cell.
- They're like the gates
- Glucose is peripheral protein (waits outside for sugar) ~ this explains diabetes
INTEGRAL PROTEINS: - Answer -✔✔- - Transverse membrane, can pass through
entire cell membrane.
- Cholesterol prevents what's water-soluble from passing in (only fat-soluble)
- Carbohydrates are markers to the immune system, so that they don't attack
themselves. Autoimmune diseases occurs if carbohydrates aren't there and cells attack
themselves.
CELL MEMBRANE STRUCTURE: - Answer -✔✔- The framework is phospholipid
bilayer
- water-soluble (hydrophilic) heads from surfaces
- water-insoluble (hydrophobic) tails form interior.
BILAYER: - Answer -✔✔- is permeable to lipid-soluble substances, but impermeable
to water-soluble substances.
CHOLESTEROL IN CELL MEMBRANE: - Answer -✔✔- Stabilizes membrane, helps
keep it impermeable to water-soluble substances. Some lipids and proteins can move;
"fluid mosaic" properties.
MEMBRANE PROTEINS HAVE MANY FUNCTIONS: - Answer -✔✔- Pores,
channels, receptors, enzymes cell contact and identification, CAMS (Cell Adhesion
Molecule)
CARBOHYDRATES IN CELL MEMBRANE: - Answer -✔✔- Cell
, recognition/interaction. Self markers !!!
CYTOPLASM: - Answer -✔✔- Consists of networks of membranes and organelles
suspended to cytosol.