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BCHM 307 Quiz 2- All Questions100% Solved with Verified Solutions
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BCHM 307 Quiz 2- All Questions100% Solved with Verified Solutions
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BCHM 307 Quiz 2- AllQuestions100% Solved with Verified
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what is the prominent type of secondary structure observed in myoglobin? -
Answer alpha-helices
Each kinesin head contains a binding site for ______ and a binding site for ______. -
Answer Tubulin; ATP
Ascorbic acid is required for the production of _______ in collagen. - Answer
Hydroxyproline
What is the most prevalent secondary structure observed in the proteins
of intermediate filaments? - Answer alpha-helices
a plot of the binding oxygen to myoglobin as a function of pO2 gives a _______ shape; a
similar plot for hemoglobin gives a _______ shape. - Answer hyperbolic; sigmoidal
Each myosin head contains a binding site for _____ and a binding site for _____. -
Answer Actin; ATP
,Proteins such as hemoglobin are known as _______ proteins since binding of a molecule
to one site alter binding to other sites. - Answer allosteric
The side chain of serine could interact with the side chain of ___ using a(n) _____. -
Answer Histidine; Hydrogen Bond
At physiological pH, all amino acids have at least ____ charged groups. - Answer 2
When a peptide bond forms, a(n) ______ reacts with a carboxylate group. - Answer
Amine
Since there are 20 standard amino acid, the number of possible linear polypeptides
of length N can be expressed as _____. - Answer 20^N
Which of the following amino acids has a nonpolar side chain? - Answer Val
What level of protein structure is characterized by the amino acid sequence? -
Answer Primary
Which of the following amino acids has a thiol group in its side chain? - Answer Cys
Salt bridges, Hydrogen bonds, hydrophobic interactions, and sulfide bonds are
all involved in what level of structure? - Answer Quaternary
At a pH above its pKa, the phenolic group of tyrosine is __________. - Answer
deprotonated and negatively charged
Disulfide bonds form between two residues of which amino acid? - Answer Cys
, At pH 3, how many charged groups are present in the pentapeptide Ala-Asp-His-Ser-Lys?
- Answer 4
What is the C-terminal amino acid in the pentapeptide Val-Leu-Arg-Ser-Gly? - Answer
Gly
The formation of a dipeptide from two amino acids requires ______. - Answer Loss of
H2O
If a protein underwent a mutation such that a Glu residue was changed to another
amino acid, which of the following amino acids would least likely result in a change
in the overall structure of the protein? - Answer Asp
At a pH above its pKa, the R-group of Asp is ______. - Answer Deprotonated and
negatively charged
The predominant non-covalent interaction seen in alpha-helices and beta-sheets
is______. - Answer Hydrogen bonds
Molecular chaperones assist proteins in the formation of _______. - Answer Tertiary
Structure
alpha-helices and beta-sheets comprise ______ structure - Answer Secondary
While the composition of hemoglobin an adult humans a alpha2beta2, in the
developing fetus, _________ is observed. - Answer alpha2gamma2
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