Chapter 3, Problem 3.8PS

Wrong Again. For each of the following false statements, change the statement to make it true, and explain why it is false as written:

1. (a) Proteins, nucleic acids, polysaccharides, and lipids are all very long polymers that are synthesized by condensation of individual monomer units.
2. (b) The amino acid proline is not found in α helices because its R group is too large to fit into the α helix.
3. (c) Whereas a protein can be denatured by high-temperature treatment, extremes of pH generally have no effect on tertiary structure.
4. (d) Nucleic acids are synthesized from monomers that are activated by linking them to a carrier molecule in an energy-requiring reaction.
5. (e) α-D-glucose and β-D-glucose are stereoisomers.
6. (f) Fatty acids are important components of all cellular lipids.
7. (g) It is easy to predict the final folded structure of a protein from its amino acid sequence using today’s powerful supercomputers.
8. (h) Most cells contain only three types of RNA: mRNA, tRNA, and rRNA.