Biochemistry ACS UPDATED
QUESTIONS WITH CORRECT
ANSWERS
Nonpolar, aliphatic AA's - CORRECT ANSWER✅✅✅gly, ala, pro, val, leu, ile, met
Aromatic AA's - CORRECT ANSWER✅✅✅phe, Tyr, trp
What wavelength do aromatic aa's absorb light? - CORRECT ANSWER✅✅✅280 nm
Polar, uncharged aa's - CORRECT ANSWER✅✅✅Ser, Thr, Cys, Asp, Glu
Are Disulfide bonds hydrophobic or hydrophilic? - CORRECT ANSWER✅✅✅hydrophobic
Polar, Positively charged (basic) aa's - CORRECT ANSWER✅✅✅Lys, Arg, His
Polar, negatively charged (acidic) aa's - CORRECT ANSWER✅✅✅Asp, Glu
What is the pI formula? - CORRECT ANSWER✅✅✅(pK1 + pK2)/2
When pH is below pI what is the net charge? - CORRECT ANSWER✅✅✅positive
For a hydropathy index, what does it show and what does a large, positive index indicate? -
CORRECT ANSWER✅✅✅hydrophobicity, very hydrophobic
Naming of a polypeptide begins at which end? - CORRECT ANSWER✅✅✅the amino end
,How much does an amino acid weigh in a peptide? by itself? What accounts for the difference? -
CORRECT ANSWER✅✅✅110 Daltons and 128 Daltons. 18 Da of water
A protein with all the same subunits - CORRECT ANSWER✅✅✅homomeric
a protein with 2 or more difference subunits - CORRECT ANSWER✅✅✅heteromeric
Non-amino acid components of a protein, tightly or covalently bound - CORRECT
ANSWER✅✅✅prosthetic groups
Non-amino acid components of a protein, loosely bound - CORRECT
ANSWER✅✅✅coenzymes
general name for Non-amino acid components of a protein - CORRECT
ANSWER✅✅✅cofactors
How many molecules of ATP per molecule of glucose (after glycolysis)? - CORRECT
ANSWER✅✅✅2
Glycolysis turns glucose into _____? How many? - CORRECT ANSWER✅✅✅pyruvate, 2
In anaerobic conditions, pyruvate undergoes which two kinds of _______? - CORRECT
ANSWER✅✅✅ethanol or lactic acid fermentation
In aerobic conditions, 2 pyruvate is turned into ______? How many? By product? - CORRECT
ANSWER✅✅✅acetyl-CoA, 2, 2CO2
Acetyl-CoA enters the ________ and produces ____ and ____ - CORRECT
ANSWER✅✅✅citric acid cycle, 4CO2, 4H2O
, Ethanol fermentation produces ____ and ____ - CORRECT ANSWER✅✅✅2 ethanol and 2
CO2
Lactic Acid Fermentation produces - CORRECT ANSWER✅✅✅2 Lactate
During stage 1 of glycolysis, one glucose molecule is converted into 2 ____ by consuming 2
____ - CORRECT ANSWER✅✅✅GAP molecules, ATP
During stage 2 of glycolysis, 2 GAP molecules are converted to 2 _____ and produce a total of 4
______ and 2 ______ - CORRECT 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. - CORRECT ANSWER✅✅✅Native Conformation
What are the three weak interactions that hold proteins in their stable conformations? -
CORRECT ANSWER✅✅✅hydrophobic interactions, hydrogen bonding, ionic bonding
What is a strong interaction that stabilizes protein conformation? - CORRECT
ANSWER✅✅✅disulfide bonds
What is the name of the bond angle associated with the bond between the alpha carbon and
amide nitrogen? - CORRECT ANSWER✅✅✅Phi
What is the name of the bond angle associated with the bond between the alpha carbon and
carbonyl carbon? - CORRECT ANSWER✅✅✅Psi
This structure occurs when each dihedral angel phi and psi remain nearly the same throughout
the segment. - CORRECT ANSWER✅✅✅Secondary Structure
QUESTIONS WITH CORRECT
ANSWERS
Nonpolar, aliphatic AA's - CORRECT ANSWER✅✅✅gly, ala, pro, val, leu, ile, met
Aromatic AA's - CORRECT ANSWER✅✅✅phe, Tyr, trp
What wavelength do aromatic aa's absorb light? - CORRECT ANSWER✅✅✅280 nm
Polar, uncharged aa's - CORRECT ANSWER✅✅✅Ser, Thr, Cys, Asp, Glu
Are Disulfide bonds hydrophobic or hydrophilic? - CORRECT ANSWER✅✅✅hydrophobic
Polar, Positively charged (basic) aa's - CORRECT ANSWER✅✅✅Lys, Arg, His
Polar, negatively charged (acidic) aa's - CORRECT ANSWER✅✅✅Asp, Glu
What is the pI formula? - CORRECT ANSWER✅✅✅(pK1 + pK2)/2
When pH is below pI what is the net charge? - CORRECT ANSWER✅✅✅positive
For a hydropathy index, what does it show and what does a large, positive index indicate? -
CORRECT ANSWER✅✅✅hydrophobicity, very hydrophobic
Naming of a polypeptide begins at which end? - CORRECT ANSWER✅✅✅the amino end
,How much does an amino acid weigh in a peptide? by itself? What accounts for the difference? -
CORRECT ANSWER✅✅✅110 Daltons and 128 Daltons. 18 Da of water
A protein with all the same subunits - CORRECT ANSWER✅✅✅homomeric
a protein with 2 or more difference subunits - CORRECT ANSWER✅✅✅heteromeric
Non-amino acid components of a protein, tightly or covalently bound - CORRECT
ANSWER✅✅✅prosthetic groups
Non-amino acid components of a protein, loosely bound - CORRECT
ANSWER✅✅✅coenzymes
general name for Non-amino acid components of a protein - CORRECT
ANSWER✅✅✅cofactors
How many molecules of ATP per molecule of glucose (after glycolysis)? - CORRECT
ANSWER✅✅✅2
Glycolysis turns glucose into _____? How many? - CORRECT ANSWER✅✅✅pyruvate, 2
In anaerobic conditions, pyruvate undergoes which two kinds of _______? - CORRECT
ANSWER✅✅✅ethanol or lactic acid fermentation
In aerobic conditions, 2 pyruvate is turned into ______? How many? By product? - CORRECT
ANSWER✅✅✅acetyl-CoA, 2, 2CO2
Acetyl-CoA enters the ________ and produces ____ and ____ - CORRECT
ANSWER✅✅✅citric acid cycle, 4CO2, 4H2O
, Ethanol fermentation produces ____ and ____ - CORRECT ANSWER✅✅✅2 ethanol and 2
CO2
Lactic Acid Fermentation produces - CORRECT ANSWER✅✅✅2 Lactate
During stage 1 of glycolysis, one glucose molecule is converted into 2 ____ by consuming 2
____ - CORRECT ANSWER✅✅✅GAP molecules, ATP
During stage 2 of glycolysis, 2 GAP molecules are converted to 2 _____ and produce a total of 4
______ and 2 ______ - CORRECT 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. - CORRECT ANSWER✅✅✅Native Conformation
What are the three weak interactions that hold proteins in their stable conformations? -
CORRECT ANSWER✅✅✅hydrophobic interactions, hydrogen bonding, ionic bonding
What is a strong interaction that stabilizes protein conformation? - CORRECT
ANSWER✅✅✅disulfide bonds
What is the name of the bond angle associated with the bond between the alpha carbon and
amide nitrogen? - CORRECT ANSWER✅✅✅Phi
What is the name of the bond angle associated with the bond between the alpha carbon and
carbonyl carbon? - CORRECT ANSWER✅✅✅Psi
This structure occurs when each dihedral angel phi and psi remain nearly the same throughout
the segment. - CORRECT ANSWER✅✅✅Secondary Structure
