BIOA01H3 Lecture Notes - Lecture 2: Cell Wall, Vacuole, Liposome

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Aarti Ashok

Document Summary

Lipids are composed of fatty acid chain, chemical structure is varied names change depending on # of. Cells can be eukaryotes or prokaryotes, vary in organelles euk have. Composed of lipids, proteins, and carbs, plasma membrane is. Carbons fatty acid chain makes lipid hydrophobic double bonds = unsaturated = less rigid = more fluid. Cell membranes selectively permeable e(cid:374)do(cid:373)e(cid:373)(cid:271)ra(cid:374)e syste(cid:373), prok do(cid:374)"t includes the nuclear envelope, golgi apparatus, endoplasmic reticulum, lysosomes, vesicles, and plasma membrane. Mitochondria and choloroplasts are energy harnessing organelles likely evolved from free-living prok cell drawing) Micelle phospholipids found in cell membrane are amphipathic, have hydrophobic tail (fatty acid, non polar) and hydrophilic head (glycerol, phosphate and polar group) bilayer. Liposome lipids associate w/ each other w/ van der waals interactions (non-covalent) between their tails b/c weak interactions, membranes are fluid, indiv. At normal cell temp. , interaction of rigid cholesterol with fatty acid tails reduces mobility and fluidity of membranes.