As you know Penicillin is produced biosynthetically from cysteine and valine. If the biosynthetic pathway could accept different amino acids, why do you think penicillin analogs are not formed during the fermentation process, with different amino acids is used?

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point