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Biochemistry ACS Exam Study Guide

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Biochemistry ACS Exam Study Guide Nonpolar, aliphatic AA's - Answer-gly, ala, pro, val, leu, ile, met Aromatic AA's - Answer-phe, Tyr, trp What wavelength do aromatic aa's absorb light? - Answer-280 nm Polar, uncharged aa's - Answer-Ser, Thr, Cys, Asp, Glu Are Disulfide bonds hydrophobic or hy...

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  • October 15, 2024
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EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.




Biochemistry ACS Exam Study Guide

Nonpolar, aliphatic AA's - Answer✔✔-gly, ala, pro, val, leu, ile, met


Aromatic AA's - Answer✔✔-phe, Tyr, trp


What wavelength do aromatic aa's absorb light? - Answer✔✔-280 nm


Polar, uncharged aa's - Answer✔✔-Ser, Thr, Cys, Asp, Glu


Are Disulfide bonds hydrophobic or hydrophilic? - Answer✔✔-hydrophobic


Polar, Positively charged (basic) aa's - Answer✔✔-Lys, Arg, His


Polar, negatively charged (acidic) aa's - Answer✔✔-Asp, Glu


What is the pI formula? - Answer✔✔-(pK1 + pK2)/2


When pH is below pI what is the net charge? - Answer✔✔-positive


For a hydropathy index, what does it show and what does a large, positive index indicate? -

Answer✔✔-hydrophobicity, very hydrophobic


Naming of a polypeptide begins at which end? - Answer✔✔-the amino end


How much does an amino acid weigh in a peptide? by itself? What accounts for the difference?

- Answer✔✔-110 Daltons and 128 Daltons. 18 Da of water


A protein with all the same subunits - Answer✔✔-homomeric

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,EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.



a protein with 2 or more difference subunits - Answer✔✔-heteromeric


Non-amino acid components of a protein, tightly or covalently bound - Answer✔✔-prosthetic

groups


Non-amino acid components of a protein, loosely bound - Answer✔✔-coenzymes


general name for Non-amino acid components of a protein - Answer✔✔-cofactors


How many molecules of ATP per molecule of glucose (after glycolysis)? - Answer✔✔-2


Glycolysis turns glucose into _____? How many? - Answer✔✔-pyruvate, 2


In anaerobic conditions, pyruvate undergoes which two kinds of _______? - Answer✔✔-ethanol

or lactic acid fermentation


In aerobic conditions, 2 pyruvate is turned into ______? How many? By product? - Answer✔✔-

acetyl-CoA, 2, 2CO2


Acetyl-CoA enters the ________ and produces ____ and ____ - Answer✔✔-citric acid cycle,

4CO2, 4H2O


Ethanol fermentation produces ____ and ____ - Answer✔✔-2 ethanol and 2 CO2


Lactic Acid Fermentation produces - Answer✔✔-2 Lactate


During stage 1 of glycolysis, one glucose molecule is converted into 2 ____ by consuming 2 ____

- Answer✔✔-GAP molecules, ATP




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, EMILLECT 2024/2025 ACADEMIC YEAR ©2024 EMILLECT. ALL RIGHTS RESERVED. FIRST PUBLISH OCTOBER 2024.



During stage 2 of glycolysis, 2 GAP molecules are converted to 2 _____ and produce a total of 4

______ and 2 ______ - Answer✔✔-pyruvate, ATP, NADH


Spatial arrangement of atoms in a protein in a cell in its functional form. Stability of a protein

refers to the ability to keep this form. - Answer✔✔-Native Conformation


What are the three weak interactions that hold proteins in their stable conformations? -

Answer✔✔-hydrophobic interactions, hydrogen bonding, ionic bonding


What is a strong interaction that stabilizes protein conformation? - Answer✔✔-disulfide bonds


What is the name of the bond angle associated with the bond between the alpha carbon and

amide nitrogen? - Answer✔✔-Phi


What is the name of the bond angle associated with the bond between the alpha carbon and

carbonyl carbon? - Answer✔✔-Psi


This structure occurs when each dihedral angel phi and psi remain nearly the same throughout

the segment. - Answer✔✔-Secondary Structure


T/F alpha helices and beta sheets are stabilized by hydrogen bonds between H, O, or N's only on

the aa backbone. - Answer✔✔-True


What is a difference of the stabilizing H-bonding between alpha helices and beta sheets? -

Answer✔✔-location of residues


In an alpha helix, how many aa residues away is the amide H atom from the carbonyl O? -

Answer✔✔-4

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