Q. You find out a mutant yeast strain that cannot grow while provided with pyruvate as its sole carbohydrate, though it grows normally when given glucose as a carbon energy source; you call this the Pyr- trait. Wild-type yeast can grow well using either carbon source; you designate this Pyr+ […]

1. Sickle-cell and malaria: Sickle-cell anemia is hereditary condition that is common among African-Americans and can cause medical problems. Some biologists suggest that the sickle-cell trait protects against malaria. That would explain why it is found in people whose ancestors originally came from Africa, where malaria is common. A study […]

1. How are drugs sorted into therapeutic groups and classes?A. first by the conditions that they are used to treat. and then by their mechanisms of actionB. first by their mechanisms of action. and then by their therapeutic effectsC. first by their side effects. and then by their therapeutic effectsD. […]

The purity of cytochrome c can be evaluated by the ratio of the molar extinction coefficient (129.1 mM-1cm-1) at 416 nm of the reduced cytochrome c and the molar extinction coefficient (23.2 mM-1cm-1) at 280 of the oxidized cytochrome c. You extracted cytochrome c from yeast in the laboratory and […]