Question posted by omega7001

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Questions Posted by omega7001

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$0.25 Closed, closed Chemistry Biochemistry If placed in water which of the following would yield the greatest number of hydrogen ions?
If placed in water which of the following would yield the greatest number of hydrogen ions and why? a.glycine b.leucine c.threonine d.oxalic acid e.arginine 		Sep. 01, 2011
$0.25 Closed, closed Chemistry Biochemistry What amino acyl has the highest positive charge at pH2?
MET-VAL-LEU-GLY-ARG-GLU-ASP-LYS-ILE   1. What amino acyl has the highest positive charge at pH2? 2. What amino acyl has the highest negative charge at pH10? 		Aug. 29, 2011
$0.25 Closed, closed Chemistry Biochemistry Where would the hydrogen bon in this peptide be?
An alpha-helix of sperm whale myoglobin has the sequence: ser-glu-gly-glu-trp-gln-leu-val-leu-his-val-trp-ala-lys-val-glu. The carbonyl oxygen of the histidine residue is hydrogen bonded to the amide... 		Aug. 29, 2011
$1.00 Closed, closed Chemistry Biochemistry Titrations
Using the attached graph: Write N if there is no solution. 1. Point at which the net charge is -1. 2.Point at which the net charge is +2. 3. Point at which the net charge is 0. 4. Point at which... 		Aug. 23, 2011
$2.00 Closed, closed Chemistry Organic Chemistry How many chiral centers does each amino acid have?
How many chiral centers does each amino acid have. Please list each amino acid and put the number of chiral centers behind it. Does arginine have more than 1 chiral center? 		Aug. 23, 2011
$3.00 Closed, closed Biology Evolution Genetics question (Weismann's hypothesis)
1. Propose 3 hypotheses to explain why sexyual reproduction has evolved. 2. Propose a way to test a hypothesis listed above. For Q3 and Q4: There is a snail that lives in New Zealand lakes that... 		Aug. 20, 2011
$1.00 Closed, closed Chemistry Biochemistry How many isomers does each of the 20 amino acids have?
How many isomers does each of the 20 amino acids have? 		Aug. 16, 2011
$2.50 Closed, closed Chemistry Inorganic Chemistry 4 Questions on solutions. Find grams, ionic strength, kw
4 Questions on solutions. YOU MUST SHOW ALL WORK FOR FULL CREDIT. Explanations would be helpful also 		Aug. 12, 0000
$1.00 Closed, closed Mathematics Algebra How to use summation notation when i is something other than 1
Summation notation question. I basically need to know how you solve the question without using a calculator when i is something other than 1. an=a1 + (n-1)d sn=n(a1 + an)/2 You have to use these... 		Jul. 30, 2011
$1.00 Closed, closed Chemistry Organic Chemistry E1, E2, SN1, SN2 dont understand. multiple choice test.
Big test coming up. Can any breakdown how to recognize E1, E2, SN1, and SN2 on a multiple choice test. I need the simple explaination. Can't seem to understand what to look for. Please be as specific... 		Jul. 28, 2011