Aresearcher synthesizes a new molecule called inhibitor x that inhibits the activity of phosphofructokinase (pfk), the enzyme that phosphorylates fructose 6-phosphate during glycolysis. inhibitor x competes with atp for binding to the pfk active site. the researcher determines that the michaelis-menten constant (km) with respect to atp is 40 μm. when 2 μm inhibitor x is added to the purified pfk reaction, the apparent km for atp increases to 48 um. calculate the dissociation constant of the pfk-inhibitor complex (k1).

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and descendants and depicting the relationships in a cladogram. which of the following best describes a challenge in classifying organisms this way? a. there are millions of species on earth, and a cladogram is not a practical means for classifying all of them. b. it is impossible to tell which organisms are most closely related to each other using a cladogram. c. cladograms are detail-oriented and do not provide a useful understanding of evolutionary relationships. d. there is a limited number of ways to organize the information, so most cladograms end up looking very similar.