How to prepare for your annual encounter with confusion. Daylight Saving Time ends Sunday at 2 a.m., which means that weâre all going to spend a few minutes scratching our heads trying to figure out whether weâre gaining or losing an hour of sleep. Save yourself the trouble and let TIME break it down for you.
For example, plasma membrane proteins carry out functions as diverse as ferrying nutrients across the plasma membrane, receiving chemical signals from outside the cell, translating chemical signals into intracellular action, and sometimes anchoring the cell in a particular location (Figure 4).
Translation is the first step in the system by which cells build proteins. It is part of the overall procedure that allows the expression of genes contained in the DNA and is critical for the continuation of cellular life. The entire process is made possible by an extremely small cellular organelle known as the ribosome.