- Study guides, Class notes & Summaries

BCH 403 EXAM 1 Questions with Complete Solutions

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10 pages

Written in 2023/2024

Classroom

BCH 403 Exam 1 Questions with Complete Solutions

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12 pages

Written in 2023/2024

Classroom

BCH 403 Exam 1 questions with complete solutions

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24 pages

Written in 2023/2024

Classroom

BCH 403 Exam 2 Questions with Complete Solutions

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12 pages

Written in 2023/2024

Classroom

BCH 403 Exam 2 Questions with Complete Solutions

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29 pages

Written in 2023/2024

Classroom

how are H bonds formed in beta sheets? Correct Answer-- between strands - H-bonds are lateral why do proteins fold if it would lower entropy? Correct Answer-- the hydrophobic effect - deltaH --> all of the interactions happening w/in the protein are favorable + overcome the unfavorable entropy of folding what types of interactions stabilize 3* structures? Correct Answer-- H-bonds - ion pair / salt bridges - van der Waals interactions: weak electrostatic interactions b/t induced dipo...

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7 pages

Written in 2023/2024

Grade A+

cracker

You're using anion exchange chromatography to purify a small globular protein. After passing the mixture through the column, you find that your protein did not "stick" to the resin and flowed right through. What is a plausible reason for this to have occurred? Correct Answer-The pH of the solution is close to the isoelectric point. Oxygen binding that affects the cooperatively of hemoglobin is an example of heterotrophic regulation. Correct Answer-False You have determined that a leucin...

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50 pages

Written in 2023/2024

Grade A+

cracker

Lecture 9 What is the energy of activation delta G knot double dagger? Correct Answer-it is the Energy difference between going from the ground state at the beginning to this high energy state which represents by the transition state what is the delta delta G knot double dagger? Correct Answer-which a reflection of how effective an enzyme which lowers the overall energy of activation. True Correct Answer-T/F Enzymes do not change the Final equilibrium state. But it does help to get int...

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19 pages

Written in 2023/2024

Grade A+

cracker

(T/F) A biochemical reaction, without a catalyst or thermodynamic coupling, takes 50 years to reach a state of equilibrium. Without more information, we cannot make a determination on either the value of the Keq constant or the positive or negative value of the ΔG of the reaction. Correct Answer-False (T/F) Due to its small size, the amino acid glycine can be found in tight turns in a protein structure. Correct Answer-True (T/F) The ΔG of a reaction is defined as the energy required to b...

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12 pages

Written in 2023/2024

Grade A+

cracker

DNA Correct Answer-- Stores genetic information -Genes - Encode RNA -RNA may encode protein -RNA may be regulatory molecule -Bound by proteins or RNA -Polymer of Deoxyribonucleotides -Double stranded (duplex) molecule Deoxynucleotide Correct Answer-Basic building block of DNA Consists of: -Nitrogenous base -Give identity to deoxyribonucleotide - Sugar ring (Deoxyribose) - Phosphate Nitrogenous bases Correct Answer-adenine, guanine, cytosine, thymine, uracail Sugar ring...

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48 pages

Written in 2023/2024

Grade A+

cracker

In E. coli, 5S rRNA is cleaved out of the pre-rRNA operon by: a. RNase III b. RNase E Correct Answer-RNase E The 5' cap: a. Does not play a role in translation b. Interacts with the poly A tail during transport out of the nucleus c. Protects the mRNA from 5' exonucleases d. Is acetylated e. Is sometimes found on E. coli mRNA Correct Answer-Protects the mRNA from 5' exonucleases The addition of the poly A tail: a. Occurs during the elongation phase of transcription b. Occurs during...

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7 pages

Written in 2023/2024

Grade A+

cracker

PeptideT or F? Peptide bonds behave as rigid planes because of partial double-bond character between the carbonyl carbon of one residue and the amide hydrogen of another residue. Correct Answer-FAlSE! B/C Hydrogen can't have a double bond, but if it stayed nitrogen it would be true. T or F? The process by which hydrophobic molecules are driven together, therefore maximizing the entropy of water, is referred to as the Hydrophobic effect. Correct Answer-TRUE! The strong electronegativity is...

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10 pages

Written in 2023/2024

Grade A+

cracker

Keq determined by... Correct Answer-chemical stability of reactants and products Gibbs free energy equation Correct Answer-▲G=▲H-T▲S thermodynamic coupling Correct Answer-pair favorable w/ unfavorable reaction ie hydrolysis of ATP what is driving force in all biochem reactions Correct Answer-water _____________ &_______________ structure depend on H2O interaction Correct Answer-protein and membrane properties of water Correct Answer-high viscosity, high bp, high heat of vap...

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24 pages

Written in 2023/2024

Grade A+

cracker

(T/F) Acid-base catalysis involving free protons or hydroxide ions is thermodynamically favorable because these are already in high concentrations in the cell. Correct Answer-False (T/F) The glycerophosopholipids of a membrane bilayer have been modified to contain additional double bonds. This change will likely lower the activation of adenylate cyclase by a G-protein. Correct Answer-False (T/F) To be inserted, a α-helical integral membrane protein requires at least one helix that is at l...

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12 pages

Written in 2023/2024

Grade A+

cracker

Exam 1 Correct Answer- A reaction consists of a reactant "R" being converted into a product "P". The change in enthalpy of the conversion is 5 kJ/mol, while the change in entropy is 35 kJ/mol. Therefore, thermodynamic coupling is not required for this reaction to reach an equilibrium. True/False Correct Answer-True Which of the following is true regarding a reaction that has a ΔG° = 0. The concentrations of the reactants and products are equal. The reaction will eventually arriv...

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52 pages

Written in 2023/2024

Grade A+

cracker

Why are enzymes really good catalysts? Correct Answer-Because enzyme active sites have evolved to catalyze reactions with maximum efficiency by using several catalytic mechanisms simultaneously Enzymes exhibit maximal activity under what kind of conditions? Correct Answer-Mild conditions, like conditions that exist in cells. Why are enzymes categorized as being extremely specific? Correct Answer-Because an enzyme usually catalyzes ONLY the reaction involving "its" substrate, even though ...

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29 pages

Written in 2023/2024

Grade A+

cracker

(T/F) Anabolic pathways require an energy input to synthesize more complex molecules from less complex molecules. Correct Answer-True (T/F) Phosphoenolpyruvate carboxykinase is found within the mitochondria. Correct Answer-False (T/F) Fructose-2,6-bisphosphate inactivates fructose-1,6-bisphosphatase by directly binding to the active site of the enzyme (i.e it's a competitive inhibitor). Correct Answer-False (T/F) Malate/ Asparate shuttle is used by the liver to transport two electrons ...

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9 pages

Written in 2023/2024

Grade A+

cracker

T or F: A biochemical reaction, without a catalyst or thermodynamic coupling, takes 50 years to reach a state of equilibrium. W/o more information, we cannot make a determination on either the value of the Keq constant or the positive or negative value of the DeltaG of the reaction Correct Answer-False T or F: Due to its small size, the amino acid glycine can be found in tight turns in a protein structure Correct Answer-True T or F: The Delta G of a reaction is defined as the energy requir...

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27 pages

Written in 2023/2024

Grade A+

cracker

BCH 403 Final Exam 2024 Questions and Answers with complete solution 100% PASSBCH 403 Final Exam 2024 Questions and Answers with complete solution 100% PASSBCH 403 Final Exam 2024 Questions and Answers with complete solution 100% PASS

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32 pages

Written in 2023/2024

Grade A+

linokinyua

BCH 403 Final Exam Actual Questions and Answers 2024 with complete solution

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19 pages

Written in 2023/2024

Grade A+

Wiseman