Nucleophilic attack Study guides, Class notes & Summaries

Classifications of proteins are based on.... correct answer: - position in the cell (membrane/soluble/extracellular) - function (transporter/enzyme/structural/hormone) - other molecules associated w/ it (glycoprotein - sugar, lipoprotein - lipid) A salt bridge is an....bond and is an example of a.....interaction correct answer: ionic, non-covalent Are salt bridges easier to break in biochem? Why? correct answer: - Yes- Interacting w/ surrounding solvent (water) Is an O bonded to a ...

agarose and agar correct answer: polysaccharides used to run DNA gels and for microbial plates bacterial cell walls correct answer: contain polysaccharides in their peptidoglycan layer lectins correct answer: are proteins that bind to sugars protein glycolsylation correct answer: assists in folding and cellular recognition, e.g. ABO blood groups -ose correct answer: indicates a molecule is some kind of carb blood group antigens correct answer: glycoproteins containing differ...

TAMU CHEM 238 FINAL EXAM QUESTIONS AND ANSWERS RATED A+ 1. Reaction of ethyl magnesium bromide with water will generate? a. ethanol b. ethane c. butane d. ethyl magnesium hydroxide e. a peroxide b 2. Under conditions of thermodynamic control, product distribution is governed by: a. the relative stabilities of the products b. the relative energies of the transition states leading to the products c. the rate at which each product is formed d. a and b e. b and c a 3. Which of the followi...

1. Reaction of ethyl magnesium bromide with water will generate? a. ethanol b. ethane c. butane d. ethyl magnesium hydroxide e. a peroxide - b 2. Under conditions of thermodynamic control, product distribution is governed by: a. the relative stabilities of the products b. the relative energies of the transition states leading to the products c. the rate at which each product is formed d. a and b e. b and c - a 3. Which of the following statements is false for the reduction of camphor...

SN1 Reaction - ANSWER- Unimolecular nucleophilic substitution - 2 steps - Starting with enantiomerically pure product tends to result in some degree of racemization - Retention AND inversion at stereocenter (R and S) - 1 nucleophile is replaced by another nucleophile - Carbocation INTERMEDIATE forms - Rate is dependent only on substrate concentration 1. LG leaves, forming a carbocation 2. Nucleophile attacks the carbocation, forming the product SN2 Reaction - ANSWER- Bimolecular nuc...

13.3 Elimination Reactions in HalogenoalkanesHow do halogenoalkanes typically react? By nucleophilic substitution How do halogenoalkanes react under different conditions? By elimination How does elimination reactions occur? A hydrogen halide is eliminated from the molecule, leaving a double bond in its place so that an alkene is formed What is the OH- ion from aqueous sodium or potassium hydroxide? A nucleophile and its lone pair will attack a halogenoalkane at C

AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022. Brown colour removed Goes colourless Allow (orange) brown to colourless Allow purple to colourless 1 (AO3) Question Answers Additional Comments/Guidelines Mark 01.5 As T increases rate (1/t ) increases OR time for completion decreases Exponentially OR By a greater/ increasing factor Many more particles have E ≥ Ea Or rate increases more and more as temp increases i.e. description of exponen...

Cumulated Diene correct answers double bonds are adjacent Conjugated Diene correct answers double bonds separated by 1 single bond Isolated Diene correct answers double bonds separated by more than 1 single bond Heteroatoms correct answers may be involved in conjugated dienes atom that isn't a carbon atom Diene Formation correct answers elimination using a strong, bulky base t-BuOK Single Bonds in Conjugated Diene correct answers shorter than typical will freely rotate allows...

UMICH CHEM 210 - Exam #3 - Reaction Mechanisms 100% Correct SN1 Reaction - ANSWER- Unimolecular nucleophilic substitution - 2 steps - Starting with enantiomerically pure product tends to result in some degree of racemization - Retention AND inversion at stereocenter (R and S) - 1 nucleophile is replaced by another nucleophile - Carbocation INTERMEDIATE forms - Rate is dependent only on substrate concentration 1. LG leaves, forming a carbocation 2. Nucleophile attacks the carbocati...

How is malonyl-CoA formed? correct answer: Carboxylation of acetyl-CoA to form malonyl-CoA requires two steps (both use acetyl-CoA carboxylase). 1. The enzyme, complexed with biotin, acquires CO2 from HCO3 - a. Requires 1 ATP 2. The carbon is transferred to acetyl-CoA to form malonyl-CoA The overall reaction is irreversible and commits the molecule to fatty acid synthesis. Phosphate is added to HCO3 - and then removed so that biotin-carboxylase can grab the carbon. The carbon is donated to...