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The Ras protein functions as a molecular switch that is set to its on state by other proteins that cause it to bind GTP. A GTPase-activating protein resets the switch to the off state by inducing Ras to hydrolyze its bound GTP to GDP much more rapidly that it would […]

Q1. 21st century tool, identify two potential causes for DNA mutation. Identify which part of the cell cycle these mutations most likely occurred. Clarify how those mutations can potentially result in cancer. Ensure you list all references used for information and images. Q2. What are the three main ions that […]

Q1. What chemical do secondary cells walls contain that is not found in primary walls and how does it affect strength and digestibility of the secondary walls? Q2. Terry suffers from dissociation of memories from their emotional content as the result of an automobile accident. What system of the brain […]

A 26 years old patient initially presented with a history of fatigability dating back to early childhood. Even very mild exercise resulted in a rapid exhaustion. After 4 minutes on a bicycle ergometer, the patient’s blood lactate concentration rose from 0.8mM to 10mM;it dropped slowly after the end of the […]