Isoelectric point pi - Study guides, Class notes & Summaries

ACS Biochemistry Final Exam Questions with All Correct Answers pKa (chapter 3) - ANSWER measure of the tendency of a group to give up a proton (acidity); tendency decreases tenfold as pKa increases by one unit thioester bond (1) - ANSWER compounds with functional group C-S-CoA-C (eg, in acetyl-CoA) zwitterion (3) - ANSWER dipolar ion with both positive and negative groups but overall neutral charge; can act as either an acid or base Isoelectric point (pI) (chapter ...

BCH2333 - Building Blocks Part 2 (Thermodynamics, Nucleic Acids, Amino Acids & Peptides, Carbohydrates, and Lipids) Quantitation of pI - Answer- pI can be quantified by Henderson-Hasselbalch equation: (pKa^-1 + pKa^+1)/2 the average of the pKas relates to the ionization of the zwitterion pI of Proteins (polyampholytes) - Answer- Proteins contain up to hundreds of pH-responsive groups; when the net charge of protein is 0, anions balance cations and the pI is reached @pH<pI, net charg...

BIOCHEMISTRY FINAL EXAM QUESTION WITH CORRECT HIGHLIGHTED ANSWERS 2023/2024 GRADED A+ 1. The β -pleated sheet forms when two or more peptide chain, called strands, line up side by side with the C=O and N-H bonds in the plane of the sheets A. true a. false 2. when the amino acid alanine (the R group is ـCH3) is added to a solution with a pH of 7.3 alanine become A. zwitterion B. nonpolar C. cation D. anion 3. the α amino acid have a carboxyl group with a pK around _____ and a...

Biochemistry Exam #2 (Module 3) questions and answers 100% verified. (Exam question 21) Dialysis - correct ates small molecules from large molecules (Exam question 30) When a protein is 'salted-in', it precipitates and is removed form a solution. - correct answers.False When we purify protein, we are going against the natural tendency toward disorder (we are fighting against entropy). - correct answers.True When centrifuging sub-cellular structures, what organ...

pKa (chapter 3) correct answers measure of the tendency of a group to give up a proton (acidity); tendency decreases tenfold as pKa increases by one unit thioester bond (1) correct answers compounds with functional group C-S-CoA-C (eg, in acetyl-CoA) zwitterion (3) correct answers dipolar ion with both positive and negative groups but overall neutral charge; can act as either an acid or base Isoelectric point (pI) (chapter 3) correct answers the characteristic pH at which the net electr...

ACS Biochemistry First Semester Exam Questions with All Correct Answers Buffer Order and Henderson Hasselbach - ANSWER Water, Buffer, Salt, Base pH = pKa + log(A/HA) pKa decrease as temp increase so pH decrease Ramachandran plots - ANSWER Φ = N-R ψ = C-R optimal angle to prevent steric hinderance Protein structure of a helix, B sheet, reverse turn - ANSWER a: LEMARKHQ B: VICYFTW RT: PSDNG how many amino acids in alpha turn helix - ANSWER 3.6 Supe...

NBME Biochemistry 2024 UPDATED EXAM QUESTIONS AND CORRECT ANSWERS || GRADED A+ Isoelectric point (pI) - ANSWER pH at which the number of positive charges equals the number of negative charges, and the overall charge on the AA is zero? 1st pKa= carboxyl group (pKa ~2) 2nd pKa= side chain (if the side chain is ionizable) 3rd pKa= amino group (pKa ~9) - ANSWER Titration curves of amino acids: 1st pKa corresponds to? 2nd pKa corresponds to? 3rd pKa co...

Buffer Order and Henderson Hasselbach correct answers Water, Buffer, Salt, Base pH = pKa + log(A/HA) pKa decrease as temp increase so pH decrease Ramachandran plots correct answers Φ = N-R ψ = C-R optimal angle to prevent steric hinderance Protein structure of a helix, B sheet, reverse turn correct answers a: LEMARKHQ B: VICYFTW RT: PSDNG how many amino acids in alpha turn helix correct answers 3.6 Super secondary structure correct answers helix turn helix parallel vs. ant...

Native-PAGE - Answer-A polyacrylamide gel electrophoresis method for proteins using NON-DENATURING conditions. Proteins keep their native charge and structure so they are separated based on charge and size. SDS-PAGE - Answer-A polyacrylamide gel electrophoresis method for proteins using DENATURING conditions. Sodium Dodecyl Sulfate denatures the proteins and gives the proteins a uniform charge. This allows them to be separated solely on mass, thus, you can estimate the protein's molecular ma...

ACS GEN CHEM 1 FINAL Exam 166 Questions with Verified Answers The physical material of the universe. It is anything that has mass and occupies space. - CORRECT ANSWER Matter is made up of relatively few elements. - CORRECT ANSWER Matter The smallest building block of matter. Smallest particle that retains the chemical property of the element (O, He, S). - CORRECT ANSWER Atom Each _______ is made of the same kind of atom - CORRECT ANSWER Element Combination of atoms held together i...