Cyclohexanone on treatment with hydroxylamine gives P, which on treatment with sulphuric acid gives Q. When Q is heated with water at high temperature, R is obtained. Identify R.
a) Nylon-6
b) Caprolactam
c) Amino caproic acid
d) Nylon-6,6
In: Chemistry
What is the pH of a solution that is 0.127 M sodium alaninate? (Sodium alaninate refers to “L-“, the fully deprotonated form of the amino acid alanine. What will be the equilibrium concentration of each of the three alanine species? pKa1 = 2.34 pKa2 = 9.69
pH: _________________
[H2L+]: ____________________ [HL]: _________________ [L-]:
_________________
In: Chemistry
which of the following is not involved in the initiation of translation in bacteria
a- mRNA
b- tRNA carrying N-formylmethionine that will occupy the P site
c- GTP and initiation factors
d- small and large ribosomal subunits
e- tRNA carrying the next amino acid that will occupy the A site
In: Biology
1. Explain what is meant by wobble in regard to translation
2. The following amino acid sequence is found in a tripeptide: Met–Trp–His. Give all possible nucleotide sequences on the mRNA, on the template strand of DNA, and on the nontemplate strand of DNA that could encode this tripeptide.
In: Biology
So far we've learned about a few important cofactors involved with amino acid metabolism. What vitamin is each cofactor also known as? What reactions are each required for? And what are the dietary implications of a deficiency in each cofactor?
In: Biology
The pKa of the α-carboxyl group of phenylalanine is 1.83, and the pKa of its α-amino group is is 9.13.
Calculate the average net charge on phenylalanine if it is in a solution that has a pH of 8.00 (If the charge is positive, you do not need to enter a " +" sign.)
Please show your work.
In: Chemistry
EF-Tu...
A. binds GTP and delivers amino-acyl tRNAs to the A site of the ribosome
B. is hydrolyzed to allow release of initiation factors
C. binds GTP and allows ribosomal movement down the mRNA
D. allows base pairing between the mRNA and the 16s rRNA
In: Biology
Choose the amino acid in the following pairs that would be more likely to appear on the solvent-exposed surface of a protein and explain why you choose that answer.
a) Lys or Leu
b) Ser or Ala
c) Phe or Tyr
d) Trp or Gln
e) Asn or Ile
In: Biology
Lys residues stabilize the ?-helical conformation when they are the carboxyl end more than when they are at the amino end. (a) Briefly explain why, using chemical structure(s) to illustrate your reasoning. (b) How might helices be expected to grow in poly(Lys) molecules?
In: Biology
Amino acid analysis of a nonapeptide yielded the following: Gly2, Glu, Met2, Lys, Arg2, Thr (subscript 2's indicate two glycines, two methionines, and two arginines). Reaction of the intact nonapeptide with Sanger's reagent yielded FDNB-Arg; incubation with trypsin yielded free Arg, free Glu, a tripeptide, and a tetrapeptide. Reaction of the tripeptide with Sanger's reagent yielded FDNB-Gly, and reaction of the tetrapeptide with Sanger's yielded FDNB-Thr. Incubation of the above tripeptide with carboxypeptidase (identifies the C-terminal amino acid) identified Arg. Incubation of the above tetrapeptide with carboxypeptidase identified Lys. Reaction of the intact nonapeptide with cyanogen bromide yielded a tetrapeptide, a tripeptide, and a dipeptide. The dipeptide contained Arg and Glu, and the tetrapeptide also contained an Arg. Given this information, what is the sequence of nonapeptide? Enter the answer using the one-letter code.
In: Chemistry