The synthesis of urea from ammonium cyanate.

• was a critical component of the Miller-Urey experiment.

• requires a protein as a catalyst

• helped dispel the vital force theory

• supported the vital force theory

Which of the following best describes the results of the Miller-Urey experiment

• It proved that DNA is the genetic material

• It produces proteins under conditions simulating the early Earth.

• It created living cells from non-living materials.

• It produced some simple organic compounds from a mixture of gases presumed to have existed in the early atmosphere.

• All of these results of the Miller-Urey experiment.

Which of these kingdoms includes only prokaryotic organisms?

• Animals

• Fungi

• Monera

• Plants

• Protista

Which of the following classes of compounds is hydrophilic?

• Sugars

• Fatty acids

• Amino Acids

• Sugars and amino acids

• All of these

For an endothermic reaction to be spontaneous, which of the following must be true?

• heat must be given off by the reaction

• energy must be added to the reaction

• the temperature must be very low

• the entropy must increase substantially

• none of the above are true

Which of the following has no L or D configuration

• Glyceraldehyde

• Proline

• Glycine

• All of these have an L or D configuration

The amino acids which occur in proteins

• are all of the L-form.

• Are all of the D-form

• can be either the L- or D-form.

• do not have L- and D- forms.

Which of the peptides would absorb light at 280 nm? Ala-Lys-His

• Ser-Gly-Asn

• Ala-Ala-Trp

• Val-Pro-Leu

• Ser-Val-Ile

The intrinsic properties of the 20 amino acids include all EXCEPT:

• a-Carbon is symmetric.

• The capacity to polymerize.

• Novel acid-base properties.

• Varied structure and chemical functionality in side chains.

• Chirality

Which of the following best describes the structure of collagen

• It is composed of a single a-helix.

• It is a double helix

• It is a triple helix

• It is composed primarily of B-sheet.