BIO SCI 98 Lecture Notes - Lecture 10: Cell Nucleus, Sulfur, Glutamine
1 Sep 2016
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Document Summary
98% of life is made of o, h, and c. Composition of life forms is very diff from that of earth. Tasks of organisms- get enery and use it to maintain balance, reproduce, move, signal, capture. Proteins- (largest part of cell) build 3d molecules that assist their tasks. Rna is not a stable form of storage for genetic info bc it has an extra oh group that could get deporotnated bc it can form a nucleophile. Lipids- not polymers, made of hydrophobic tail and hydrophilic head. Separates inside from outside (barrier) and store energy (oil in plants, fat in animals). Micelles- hydrophobic groups of lipids that increase entropy, sphere(energentically favorible). Carbohydrates- most common=glucose, many glucose molecules linked together can be broken down to harvent energy. Store energy and can be used for recognition (informational). Bioenergetics- analyzes how organisms obtain and utilize energy. 1st law of thermo- energy can"t be created or destroyed.
