1. Go to the link http://media.hhmi.org/biointeractive/click/shells_online/index.html and work through the lab sorting sea shells based on morphological characteristics to study evolutionary relationships. 2. Please take notes for your laboratory report. You will add an introduction later. Write a short note describing each step of identifying and selecting snails as you […]

Think about these two facts: a) The alpha-subunit of the G-protein trimer has an intrinsic GTPase activity, which is important in terminating the action of G-protein coupled systems.  b) The CFTR is activated by cAMP.  Here’s the question: If you introduced a toxin into the intestinal cell that blocks the intrinsic GTPase […]

A. Discuss the limitations upon cell size imparted by unfavorable changes in the surface area to volume (SA/V) ratioas cells have become larger in evolutionary time. B. There are two structural adaptations of eukaryotic cells that enable them toattain larger sizes than prokaryotic cells. One of them is compartmentalization. You […]

An enzyme with a Km of 0.36 mM was assayed using substrate concentrations of 3 x 10E-7 M, 9.5 x 10E-5 M, 1.5 x 10E-4, 1.16x10E-3, 3 x 10E-3 M, 0.01 M, 0.08 M. At a substrate concentration of 0.08 M, the initial velocity was 192 nM/min. Calculate the initial […]