Biol 235: Chapter 3 | Q&A Latest 2024/2025 | 100% PASS

Biol 235: Chapter 3 | Q&A Latest 2024/2025 | 100% PASS Define Cell - Answer -Living structural and functional units enclosed by a membrane Cell Biology - Answer -Study of cellular structure and function 3 major components of a cell - Answer -Plasma Membrane, Cytoplasm, Nucleus Plasma Membrane - Answer -Forms cell's flexible outer surface separating internal and external environment Regulates flow in and out of cell Plays role in communication among and between cells and external environment Cytoplasm - Answer -Cellular contents between membrane and nucleus has 2 parts 1) Cytosol --> fluid portion; contains H2O, dissolved solutes, and suspended particles 2) Organelles --> within cytosol Nucleus - Answer -House's cell DNA Lipid Bilayer - Answer -2 back to back layers made up of 3 types of lipids 1) phospholipids (75%)2) Cholesterol (20%) 3) Glycolipids (5%) Occurs because lipids are amphipathic --> polar and non polar molecules and have hydrophobic centers Cholesterol are weakly amphipathic Integral Membrane Proteins - Answer -extends into or through lipid bilayer among fatty acid; tails are embe