A newly discovered amino acid can exist in two conformations; A,
and B. Conformer A is...
A newly discovered amino acid can exist in two conformations; A,
and B. Conformer A is 2.4 kJ/mol higher in energy than conformer B.
Calculate the ratio of the two conformers at 20 o C.
Solutions
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(b) After the newly formed protein leaves the ribosome the first
amino acid in the protein, methionine, is removed. What specific
type of enzyme catalyzes this reaction?
(c) When benzo[a]pyrene is formed in the burning of meat. What
substance(s) in the meat is the source of the aromatic rings in the
product?
(d) How do drug manufacturers make most drugs water soluble?
(e) What is the name of the reaction that would convert a RNA
nucleoside into a DNA nucleoside?
Two amino acids are either not a standard alpha- amino acid or
in the S configuration. Which
residues are they, and how are they different? Illustrate your
reasoning with chemical
structures
The amino acid glutamic acid has the molecular formula C5H9NO4,
and the amino acid isoleucine has the molecular formula C6H13NO2.
Determine how many moles of isoleucine contain the same number of
atoms as 1.96 mol of glutamic acid.
“Protein A” is phosphorylated at one amino acid by a kinase,
“protein B”, and dephosphorylated by a phosphatase, “protein
C”.
You have purified all three of these proteins and want to
determine the structural changes that occur when protein A is
phosphorylated or dephosphorylated. Explain in detail how you would
go about designing and conducting this investigation.
“Protein A” is phosphorylated at one amino acid by a kinase,
“protein B”, and dephosphorylated by a phosphatase, “protein C” You
want to determine the mechanisms of protein B and C. What
experimental information would you need in order to propose a
reasonable mechanism? Explain.
Two newly discovered planets follow circular orbits around a
star in a distant part of the galaxy. The orbital speeds of the
planets are determined to be 44.3 km/s and 59.8 km/s. The slower
planet's orbital period is 6.92 years. (a) What is
the mass of the star? (b) What is the orbital
period of the faster planet, in years?
Two newly discovered planets follow circular orbits around a
star in a distant part of the galaxy. The orbital speeds of the
planets are determined to be 42.6 km/s and 53.6 km/s. The slower
planet's orbital period is 6.30 years. (a) What is
the mass of the star? (b) What is the orbital
period of the faster planet, in years?
Two newly discovered planets follow circular orbits around a star
in a distant part of the galaxy. The orbital speeds of the planets
are determined to be 44.2
km/s and 57.5
km/s. The slower planet's orbital period is 7.50
years.
(a) What is the mass of the star?
kg
(b) What is the orbital period of the faster planet, in
years?
1.The amino acid serine is classified as a(n)
_________________________________________________ amino acid.
2.A type of chromatography that fractionates proteins based on
differences in their size is ____________________________________
chromatography.
3.
In Anfinsen's experiments on the structure and function of
RNase, he found that non-covalent bonds were key in determining the
_________________________ structure of the enzyme.
4.
A type of reversible enzyme inhibitor that binds to the active
site of an enzyme and prevents the substrate from binding the
active site is is...