Feedback: Multiple Choice Quiz 5
All of the correct answers have a green check mark.
Incorrect answers have the "red-lit" button next to your choice.
- Table 3.2 in Campbell lists all of the values. Ignore the detailed differences, but remember the values shown here.
- Only the Trp & Tyr combination is aromatic, a necessary feature for UV absorption.
- Asp is acidic while Ile and Pro are non-polar and hydrophobic. See Fig. 3.3 in Campbell.
- The isoelectric point is defined on pg 67 in Campbell.
- At pH 7.3, the amino group is positively charged and the carboxyl group is negatively charged.
- The incorrect answers all have significant errors. Can you change one word in each of these four statements so that they accurately refer to the peptide bond?
- The correct answer takes account of the fact that nine (9) waters are liberated during the condensation reactions.
- The first and fourth statements are incorrect. In the case of d, the α-carbon is not involved in the peptide bond.
- In the cis form, the two α-carbons on adjacent residues are really too close to each other.