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BIOB10H3 (252)
Aarti Ashok (125)
Lecture

Important Terms and Definitions

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Department
Biological Sciences
Course
BIOB10H3
Professor
Aarti Ashok
Semester
Summer

Description
LECTURE#2 x Covalent bonds are strong bonds; are in nonpolar molecules x An example of nonpolar molecules: Molecules that are made up of C and H are called hydrocarbons x Noncolvalent bonds are interactions between molecules or different parts of a large biomolecule; weaker bonds x An example of a polar molecule is water; partially positive H will interact with partially negative O in a different water molecule (hydrogen bond) x du}ÇZP]vv}v}ou}oµolv}Áv^]}o_ Common linkages between functional groups x Ester: Alcohol +Carboxylic Acid x Amide/Peptide: Carboxylic Acid +Amine x Glucose is a 6-membered ring x Oligosaccharides is a small chain of sugars; oligo = a few x Glycogen is a polymer of glucose with alpha-1,6 and alpha-1,4 glycosidic linkages (alpha means both atoms are located on the same(cis) side x Starch, another polymer of glucose has only alpha-1,4 linkages x Cellulose has beta-1,4 linkages x Chitin, a polymer of N-acetylglucosamine also had beta-1,4 linkages x Fats are normally saturated (i.e. no double bonds) x Phospholipids have a hydrophilic polar head made up of a phosphatidyl choline and a hydrophobic non-polar tail made up of 2 fatty acid chains; also contain a glycerol backbone x There are two types of nucleotides: DNA (deoxyribonucleic acid) and RNA (ribonucleic acid); DNA contains the 5-carbon sugar called deoxyribose, while DNA contains ribose as the 5-carbon sugar x Proteins are made up of amino acids as their monomers; there are 20 different types in which only the R groups are different; amino acids are made up of an alpha carbon, a carboxyl group, an amino group and a side chain x In protein folding: Ribonuclease is an enzyme that chews up RNA x Interactions between neighbouring residues leads to the initial events in folding to the secondary structure of the protein x Chaperones are proteins that aid/help in the folding of newly made proteins by preventing inappropriate interactions x Two types of common folding patterns into secondary structure: alpha-helix and beta-pleated sheets x The quaternary structure of proteins is the linking of multiple proteins to form large complexes Á]Zuµo]o_µµv]_vmultiprotein complexes; includes intermolecular interactions of R groups such as disulfide bonds and mostly noncovalent interactions x Homodimer =2 of the same molecules attached together; haemoglobin is a heterotetramer t www.notesolution.com x Sugar chains can be added t}}]vÁZ]ZZvoo^PoÇ}}]v_ x Protein-protein interactions can be stable and such complexes are involved in important cell functions such as DNA replication www.notesolution.comLECTURE#2 N Covalent bonds are strong bonds; are in nonpolar molecules N An example of nonpolar molecules: Molecules that are made up of C and H are called hydrocarbons N Noncolvalent bonds are interactions between molecules or different parts of a large biomolecule; weaker bonds N An example of a polar molecule is water; partially positive H will interact with partially negative O in a different water molecule (hydrogen bond) N @K} Z2Z]LL}L}oK}o oZlL}LZ^]}oZ_ Common linkages between functional groups N Ester: Alcohol +Carboxylic Acid N AmidePeptide: Carboxylic Acid +Amine N Glucose is a 6-membered ring N Oligosaccharides is a small chain of sugars; oligo = a few N Glycogen is a polymer of glucose with alpha-1,6 and alpha-1,4 glycosidic linkages (alpha means both atoms are located on the same(cis) side N Starch, another polymer of glucose has only alpha-1,4 linkages N Cellulose has beta-1,4 linkages N Chitin, a polymer of N-acetylglucosamine also had beta-1,4 linkages N Fats are normally saturated (i.e. no double bonds) N Phospholipids have a hydrophilic polar head made up of a phosphatidyl choline and a hydrophobic non-polar tail made up of 2 fatty acid chains; also contain a gly
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