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BCHM 307 Exam | Quizzes and 100% Correct Verified Solutions
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BCHM 307 Exam | Quizzes and 100% Correct Verified Solutions
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BCHM 307 Exam | Quizzes and 100%Correct Verified Solutions
The primary structure of a protein is held together by - Answer peptide bonds
pH= - Answer pH=-log[H+]
detergents are - Answer amphiphilic molecules
hydrogen bonds occur between ___ donors and ___ - Answer occur between polar
donors and acceptors
Glutamate has the following pKa's: 2.2 (alpha-carboxyl group), 4.3 (R group), and 9.7
(alpha amino group). What charge would be present on this molecule at pH 7? -
Answer -1
Water is a dipole because - Answer oxygen is more electronegative than hydrogen
of it non-linear arrangement of atoms
for a molecule that functions as a buffer - Answer -it's buffering capacity is at
the molecule's pKa +/-1 pH unit
-consists of weak acid and conjugate base pair
Most of the common amino acids are chiral because - Answer Their alpha carbon
has four different substituents
,The primary structure of a protein is held together by - Answer peptide bonds
Ultimately all levels of protein structure are dependent on - Answer the amino
acid sequence of the protein
which of the bonds or interactions listed below are important for a proteins
secondary structure? - Answer hydrogen bonds between atoms that are part of the
protein main chain
which of the bonds or interactions listed below are important for a proteins
territory structure? - Answer hydrogen bonds, hydrophobic interactions and charge-
charge interactions involving main chain and R-group atoms
Information about mass sectrpmeters - Answer -Mass spectrometers can be used to
precisely measure the mass of a molecule
-the genome of an organism must be sequenced for identifying a protein based on
its peptide individual masses
-mass spectrometers can be used to determine the amino acid sequence of peptides
Which method would be most appropriate to separate two proteins for an
enzyme assay that had similar molecular weights but different net charges? -
Answer Ion exchange chromatography
The R groups of amino acids in an alpha helix - Answer point toward the outside of the
helix
SDS is used in SDS-PAGE to? - Answer -help denature proteins
-make all the proteins migrate to the positive pole
, Enzymes catalyze biochemical reactions by - Answer decreasing the activation energy
of the reaction
During enzyme mediated catalysis, the unstable intermediate that is no longer
substrate and not quite product is known as - Answer the transition state
A homotetramer - Answer -can be stabilized by hydrogen bonds, ionic interactions,
and hydrophobic interactions
-is made up of four identical subunits
In SDS-PAGE, which proteins exit the gel first - Answer the smallest
Agents that can be used to denature proteins and indicate what bonds it disrupts
- Answer
What types of bonds are used to stabilize substrates in the active site of enzymes?
- Answer -hydrogen bonds
-hydrophobic interactions
-ionic interactions
In gel filtration chromatography, which proteins exit the column first - Answer
the largest
Pathways leading to essential amino acids are good targets for ___ - Answer herbicides
Glyphosphate (Roundup) is an inhibitor of ___, an enzyme of the shikimic acid pathway -
Answer EPSP synthase
Glyphosphate blocks __ - Answer Blocks the production of aromatic amino acids
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