Quora User, learning lessons from life. 1  one who knows every strong point of you, as well as weak!!! 2  one who knows every problem of yours. 3  one who always ready to listen you. 4  one who always with you outside class just because you will be bore there alone. 5  one who always teases you and you don't get angry and viceversa.
Function and structure. Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative reaction pathway of lower activation energy. Like all catalysts, enzymes take part in the reaction - that is how they provide an alternative reaction pathway.
Detective quantum efficiency. The detective quantum efficiency (often abbreviated as DQE) is a measure of the combined effects of the signal (related to image contrast) and noise performance of an imaging system, generally expressed as a function of spatial frequency.