Nucleophilic attack Samenvattingen, Aantekeningen en Examens
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BCH210 Midterm Test 1 (OWN), BCH210 Class 2 (+learn this w/ the notes), BCH210 Class 3, BCH210 Class 4, BCH210 Class 5, BCH210 Class 6, BCH210 Class 9
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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 ...
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BCH210 EXAM| 341 QUESTIONS| WITH COMPLETE SOLUTIONS
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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...
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AQA A-Level CHEMISTRY 7405/2 Paper 2 Organic and Physical Chemistry Mark scheme June 2022
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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...
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Tamu Chem 238 Final Exam Questions and Answers 100% Solved | Already Passed
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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...
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13.3 Elimination Reactions in Halogenoalkanes question n answered graded A+ 2023
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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
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UMICH CHEM 210 - Exam #3 - Reaction Mechanisms Accurate 100%
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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...
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TAMU CHEM 238 FINAL EXAM QUESTIONS AND ANSWERS RATED A+
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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...
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CHM 242 EXAM 1 || Questions and 100% Accurate Answers.
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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...
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BIochem final Exam 4 :) Questions With Complete Solutions
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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...
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UMICH CHEM 210 - Exam #3 - Reaction Mechanisms 100% Correct
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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...
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