BICH 410 EXAM 2 COMBINED SET
QUESTIONS WITH COMPLETE
SOLUTIONS
Why is the peptide bond planar? - Answer- It contains partial double-bond character,
preventing rotation
Formation of a peptide bond produces ______ as a product - Answer- water
The sequence of the above structure is: - Answer- HAT
Calculate the net charge of above structure at pH 7 - Answer- 0
The structure above exists at the ionization state shown when the pH is equal to -
Answer- 1
Which of the following best represents the backbone arrangement of part of a
polypeptide? - Answer- Calpha-Co-N-Calpha-Co-N
At pH=0, the net charge on the following peptide will be negative - Answer- None of the
above
To sequence a protein made of two, short peptides, A and B, linked by an inter-
molecular disulfide bond: - Answer- First,DTT. Second, IOAc. Third, chromatography.
Fourth, Edman's reagent.
The pH closest to the isoelectric point of TEST is - Answer- 3
What level of protein structure is characterized by backbone H bonds? - Answer-
Secondary
All of the following characteristics describe the beta sheet EXCEPT - Answer- Parallel
beta sheets containing fewer than five chains are the most common.
Quaternary structure refers to - Answer- a multisubunit structure
Where are turns and loops found? - Answer- On the protein surface
Which of the following amino acid residues would most likely be buried in the interior of
a globular protein? - Answer- F
QUESTIONS WITH COMPLETE
SOLUTIONS
Why is the peptide bond planar? - Answer- It contains partial double-bond character,
preventing rotation
Formation of a peptide bond produces ______ as a product - Answer- water
The sequence of the above structure is: - Answer- HAT
Calculate the net charge of above structure at pH 7 - Answer- 0
The structure above exists at the ionization state shown when the pH is equal to -
Answer- 1
Which of the following best represents the backbone arrangement of part of a
polypeptide? - Answer- Calpha-Co-N-Calpha-Co-N
At pH=0, the net charge on the following peptide will be negative - Answer- None of the
above
To sequence a protein made of two, short peptides, A and B, linked by an inter-
molecular disulfide bond: - Answer- First,DTT. Second, IOAc. Third, chromatography.
Fourth, Edman's reagent.
The pH closest to the isoelectric point of TEST is - Answer- 3
What level of protein structure is characterized by backbone H bonds? - Answer-
Secondary
All of the following characteristics describe the beta sheet EXCEPT - Answer- Parallel
beta sheets containing fewer than five chains are the most common.
Quaternary structure refers to - Answer- a multisubunit structure
Where are turns and loops found? - Answer- On the protein surface
Which of the following amino acid residues would most likely be buried in the interior of
a globular protein? - Answer- F
