Throughout the course you have heard about the Ras GTPase family. Tubulin is also a GTPase that is distantly related to this family. Tubulin dimers hydrolyze GTP at a very slow intrinsic rate. When incorporated into a microtubule, however, their rate of GTP hydrolysis increases dramatically. As you will remember, […]

Q1. Archeologists discover skeletal remains of humanlike animals in Ethiopia. Examination of the bones suggests that the remains represent four types of individuals. One of the skeletons has a bone density of 30 percent less than those of the other skeletons. The skeleton with the lower bone mass also has […]

A large piano that weighs 4100 N is to be moved into a house by way of an opening that is 1.5 m from the ground. If the movers use an18 m plank as an incline and a force of 600 N, what is the ideal mechanical advantage? A cart […]

Q1. You have collected an air sample by using a pump which draws 1cfm (cubic foot/minute). You collected a sample for 5 minutes directly on appropriate microbiological media. Following incubation you observed an average of 55 colonies on the plates. How various organisms are present in 1m3 of air given […]