#Question id: 12763
#Unit 10. Ecological Principles
#Question id: 13142
#Unit 10. Ecological Principles
The Norway rat (Rattus Norvegicus), a widespread pest, was controlled for about a decade by the anticoagulant warfarin. This chemical substance, placed in food pellets, is absorbed by the intestinal tract and inhibits the clotting of blood. After a population decline for about 10 years, rat populations increased and stabilized. In one European population, as illustrated in the graph below, the percentage of rats resistant to warfarin has remained fairly stable over a number of years.
Resistance to warfarin is governed by a dominant autosomal gene, R. More than 15 percent of the resistant animals are heterozygous at this locus (Rr). The table below indicates the response to warfarin and relative reproductive fitness of individuals that are homozygous or heterozygous for the dominant gene (R). The RR individuals have a 20-fold increase in vitamin K requirement over individuals.
#Question id: 27945
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following statements is true regarding the payoff phase of glycolysis
a. Each molecule of glyceraldehyde 3-phosphate is oxidized and phosphorylated by ATP to form 1,3-bisphosphoglycerate
b. Each molecule of glyceraldehyde 3-phosphate is oxidized and phosphorylated by inorganic phosphate to form 1,3-bisphosphoglycerate
c. Oxidative phosphorylation of 3-Phosphoglycerate produces one NADH
d. Oxidative phosphorylation of glyceraldehyde 3-phosphate, produces one NADH
#Question id: 20026
#Unit 13. Methods in Biology
#Question id: 26369
#Unit 3. Fundamental Processes