Date 34. Which of the following amino acids can coordinate to a metal ion? a. ar

Question

Date 34. Which of the following amino acids can coordinate to a metal ion? a. arginine b. glutamic acid 35. Which of the following denaturing agents affects hydrophobic regicesi? 36. Which of the following pairs of amino acids can form hydrogen bonds? 37. How many amino acids have an amide side chain? a. detergents b. heat c. heavy metals d urea a. alanine and glutamic acid c. leucine and phenylalanine b. aspartic acid and lysine d. serine and tyrosine 38. Which of the following is true of the isoelectric point of amino acids? a. The isoelectric points of all amino acids are the same b. It is the pll at which an amino acid conducts electricity c. It is the phi at which an amino acid has equal numbers of positive and negative charges d. All of the above are true 39. Antiparallel -sheets have: a. sheets that progress from N to C termaini in the same direction b. usually all of their hydrophobic residues on one side of the sheet c. all hydrophobic residues. d. all hydrophilic residues e. fibers that can be stretched or extended, but are not flexible 40. Alpha helices are stabilized primarily by a. hydrogen bonds between the main chain peptide bond com b. electrostatic interactions between R-groups c. hydrophobic interactions between the a-carbons of the main chain. d. hydrogen bonding between the R-groups e. hydrophobic interactions between R-groups and the solvent water. electrostatic interaction might occur within a protei between which of the following amino acid pairs at typical physiological pH? a. Ser/Asn b. Asp Glu c. Arg Cys d. Lys/Asp e. Valle

Explanation / Answer

Answers:

34:

Option b

glutamic acid

35:

Option a

detergents

36.

Option d

serine and tyrosine

37:

Option b

2

38:

Option d

all of the above are true

40:

Option a

hydrogen bonds between the main chain peptide bond component atoms

41:

Option e

Val/Ile

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