Chapter 6: Q9P. (page 177)
Globular proteins are typically constructed from several layers of secondary structure, with a hydrophobic core and a hydrophilic surface. Is this true for a fibrous protein such as α keratin?
Yes, this is true for fibrous protein such as alpha keratin.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Why would you be unlikely to see an α helix containing only the following amino acids: Arg, Lys, Met, Phe, Trp, Tyr, Val?
Draw a cis peptide bond and identify the groups that experience steric interference.
In prokaryotes, the error rate in protein synthesis may be as high as 5 × 10−4 per codon. What fraction of polypeptides containing (a) 500 residues or (b) 2000 residues would you expect to contain at least one amino acid substitution?
Describe the forces that stabilize proteins, and rank their relative importance.
It is often stated that proteins are quite large compared to the molecules they bind. However, what constitutes a large number depends on your point of view. Calculate the ratio of the volume of a hemoglobin molecule (65 kD) to that of the four O2 molecules that it binds and the ratio of the volume of a typical office (4 × 4 × 3 m) to that of the typical (70-kg) office worker that occupies it. Assume that the molecular volumes of hemoglobin and O2 are in equal proportions to their molecular masses and that the office worker has a density of 1.0 g/cm3. Compare these ratios. Is this the result you expected?
What do you think about this solution?
We value your feedback to improve our textbook solutions.
