BISC207 Lecture Notes - Lecture 1: Endoplasmic Reticulum, Electronegativity, Cell Wall

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BISC207 Full Course Notes
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BISC207 Full Course Notes
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25 documents

Document Summary

Chemistry in biology: plant and animal cells, plant cell has cell wall, nucleus, vacuoles, cell membrane, cytoplasm, chloroplasts, animal cell has cell membrane, nucleus, mitochondria, endoplasmic reticulum, cytoplasm, ribosomes, cell wall protects the cell, nucleus. Chemistry of atoms determines how they interact with other atoms. Properties of bonds between atoms determines to p. 2 in first orbital, 8 in all others. Atomic number- number of protons in the atom. Atomic weight- used in lab for making molar solutions. Electrons not evenly shared-more closely associated with the oxygen. O is more electronegative than h, so partial charges exist on the o and h atoms. Atoms may have different electronegativities-the strength with which they pull electrons towards themselves. A single water molecule is held together by polar covalent bonds. Not everything is soluble in water-nonpolar covalent bonds-hydrophobic. Amphipathic- molecule that is both polar and nonpolar. Buffers protect against changes in ph- maintain homeostasis.

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