Bch210 - Study guides, Class notes & Summaries

Which ONE of the following amino acids may be linked covalently to an oligosaccharide via an O-glycosidic bond? A. Glc B. Tyr C. Thr D. Asp correct answer: C - Thr has an OH side chain Which ONE of the following statements is CORRECT regarding the role of thermodynamics in glycolysis? A. It is spontaneous in the forward direction due to the cleavage of glucose into 2 molecules. B. ATP is required as the pathways is unfavourable under standard conditions. C. Thermodynamically favourabl...

Membranes (both outside and inside the cell) correct answer: Not a static structure, very important for cell function. They contain proteins that are very complex and vital to cell life. Mitochondria membranes correct answer: Very vital for the cell, has both an inner and outer membrane. What drives membrane formation? correct answer: A decrease in ionic interactions with water / limiting the hydrophobic interactions drives membrane formation. Lipid tails are ... correct answer: Hyd...

proteins correct answer: polymers of amino acids linked in a linear chain by peptide/amide bonds (polypeptides) polysaccharides correct answer: polymers of sugars (mono-saccharides) linked in linear and branched chains by glycosidic bonds DNA correct answer: polymers of nucleotides linked in linear chains by phosphodiester bonds protein enzymes correct answer: Linkages (bonds) are formed/broken by _______? sickle cell anemia correct answer: a single amino acid change in hemoglob...

What is the formula for a monosaccharide? Use an example to describe how monosaccharides link to form disaccharides correct answer: (CH2O)*n, where n is the number of carbons and must be greater than 3 (e.g. glucose has 6 carbons, C6H12O6). Glucose and fructose are both monosaccharides, which link through a glycosidic bond to form sucrose, a disaccharide Name, classify and describe the two simplest monosaccharides (3 carbons) correct answer: Glyceraldehyde: Aldo-triose, aldehyde on one end ...

Name three factors responsible for membrane formation correct answer: Decrease in ionic interactions with water Decrease in membrane entropy Non-covalent interactions between lipids and proteins What membrane structures allow the cell membrane to modulate cell-cell recognition? correct answer: Glycoproteins and glycoplipids What non-covalent forces drive spontaneous membrane assembly? correct answer: Hydrophobic effect, hydrogen bonds and van der Waals What is the most important re...

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BCH210 TESTED QUESTIONS WITH REVISED ANSWERS – UPDATED cross linker can be used in what techniques - Answer-stabilize X ray structure limitation of BiOID - Answer-can only proximate, maybe the proteins are just passing by the POI beads connect to what in BiOid - Answer-biotin released by ligase what is PDI - Answer-protein disulfide isomerase a kind of chaperon, isomerase structure of DE at pKa, why - Answer-C=O no - charge because protonated are cofactors proteins - Answer-...

Which AA likes to form alpha helix? correct answer: Glutamate Which AA likes to form beta sheet correct answer: Valine Which amino acids have aliphatic side chains? correct answer: alanine, glycine, valine, leucine, isoleucine, which amino acids have aliphatic hydroxyl side chains? correct answer: serine and threonine which amino acids have aromatic side chains? correct answer: phenylalanine, tyrosine, tryptophan which amino acids are sulfur containing? correct answer: cyste...

What does Rotenone and amytal do? correct answer: Inhibit electron flow from complex I to CoQ What does antimycin A do? correct answer: blocks complex III What does Cyanide, azide and Co do? correct answer: Inhibit complex IV what does oligomycin do? correct answer: inhibits ATP synthase, by binding to c subunit of ATP synthase blocking the flow of protons What are uncouplers? correct answer: disconnect ATP synthesis from electron flow, have ability to transport protons across i...