Peptides/DNA

Insulin is a polypeptide hormone that contains two short polypeptide chains linked by two interstrand disulfide bonds. The most logical order of events to perform in order to sequence this protein would be: A: The peptides are reduced with mercaptoethanol. B: The peptides are sequenced using Edman chemistry . C: The peptides are separated by chromatography techniques. D: The peptides are alkylated with iodoacetamide. a.A, D,C,B b.C,A, D, B c.C, B, A, D d.A, B, C, D Determine the amino acid sequence of the following oligopeptide from the experimental data below: The amino acid composition is found the be ala, Iys, phe, met, cys plus some decompsition products. 2.The ... click for more

Enzymes/III

Which of the designations listed below does not correspond to a major class of enzymes as outlined by the International Union of Biochemistry? a.Hydrolases b.Transferases c.Carboxy lases d.Isomerases A particular oxidoreductase requires F AD as an essential component for its activity. The complete biological unit required for reaction is called a: a.Holoenzyme b.Cofactor c.Coenzyme d.Apoenzyme Most coenzymes are derived from, or are: a.Metal ions b.Carbohydrates c.Amino acids d.Vitamins Given the rate law, rate = k[A][B), the overall reaction order is: a.Zero b.One c.Two d.Cannot be determined The Briggs and Haldane steady state assumption used... click for more

Understanding volume

If I have the mass total and I'm trying to find the volume of one of the items that makes up the total mass? D=M/V

Its about acid and base equilibrium.

A 0.1mol/L aqueous solution of weak monoprotic acid (contains one ionizable hydrogen atom) has a hydrogen ion concentration of 0.001mol/L. The value of the ionization,Ka, for this acid is a) 10^-6 (10 to the power of -6) b) 10^-2 (10 to the power of -2) Ps: I don't know what they are asking for, please show me the work step by step and tell me what they are asking for? Note the way I type the question is the way it's written down in my textbook.

Heat reaction, activation energy, diagram

FOR THE REACTION CO + NO2 ------>CO2 + NO The activation energy for the forward reaction is 135 kj/mol of CO reacted. A) Determine the heat of reaction. B) From the data given and the enthalpy of reaction, determine the activation energy for the reverse reaction. C) Draw and label a potential energy diagram for the reaction. *NOTE: PLEASE CHECK THE ATTACHED FILE