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Chapter 3: The Cell
ANPY 101 Ivy Tech
| Question | Answer |
|---|---|
| Parts of Cell | Plasma/Cell Membrane, Cytoplasm (cytosol and organelles except for the nucleus), Nucleus |
| Levels of Complexity | organelles - cells - tissues - organs - organ system |
| Three types of lipid molecules that make up lipid bilayer | phospholipids - cholesterol - glycolipids |
| Which of the three types of lipid molecules in the lipid bilayer are amphipathic molecules? | phospholipids |
| Define amphipathic. | Polar and non-polar parts, the polar "head" pointing out and the non polar tail pointing toward the center of the layer |
| Weakly amphiphotic molecules that are interspersed among other lipids in the lipid bilayer | cholesterol |
| Type of lipid molecules that only appear in the membrane layer which faces the extracellular fluid | Glycolipids |
| Ratio of lipid to protein in plasma membrane. | 50:50 |
| What is the flexible but sturdy barrier that surrounds the cytoplasm of the cell? | Plasma membrane |
| What percentage of lipids in lipid bilayer are phospholipids? Cholesterol? Glycolipds? | 75% - 20% - 5% |
| Type of lipid molecule that is interspersed amount the other lipids in both layers of the cell membrane. | Cholesterol |
| Type of lipid molecule (carbohydrate groups) in cell membrane that forms a polar head only on the side of the cell membrane facing the extracellular fluid. | Glycolipids |
| The polar head of phospholipid is hydrophilic or hydrophobic? | Hydrophilic |
| The polar tail of phospholipid is hydrophilic or hydrophobic? | Hydrophobic |
| Are integral or peripheral proteins found at the inner or outer surface of the membrane? | Peripheral |
| Do integral or peripheral proteins extend into or across the entire lipid bilayer among the fatty acid tails of the phospholipid molecules? | Integral |
| Can integral or peripheral proteins be stripped away from the membrane without disturbing membrane integrity? | Peripheral |
| Are cellular adhesion molecules peripheral proteins or integral proteins? | Peripheral proteins |
| What are the functions of membrane proteins? | Formation of channel Transporter protein Receptor protein Cell identity marker Linker - anchor proteins in cell membrane to other cells -allow cell movement -help maintain cell shape and structure Act as enzyme |
Created by:
spritle
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