BISC 3521 Study Guide - Midterm Guide: Van Der Waals Force, Aromatic Amino Acids, Relative Permittivity
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5 Sep 2018
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Living systems require a limited variety of atoms and molecules: oxygen, hydrogen, carbon. Central dogma describes basic principles of bio info transfer: crick: dna rna protein. Chapter 2: water, weak bonds, generation of order out of chaos. Many weak bonds can result in large stable structures. Weak bonds allow transient interactions, allow dynamic interactions. Transient (weak and reversible) chemical interactions form basis of biochemistry and life. Thermal motions power biological interactions: brownian motion: due to random fluctuation of energy content of environment; thermal noise, in cell, water is most common medium for thermal noise. Building blocks of proteins, act as signal molecules (such as neurotransmitters), and are precursors to other biomolecules (such as hormones, nucleic acids, lipids) Essential amino acids must be obtained from diet: microorganisms can synthesize 20 amino acids but humans can only make 11, lack of can lead to disease such as kwashiorkor, lack of protein in blood.
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