Definitions for Jan 11

For those of you who didn't do your homework and look up the definitions on part 4b:

Transcription - synthesis of RNA using strand of DNA as the template; transcription begins with a strand of DNA. It is divided into several important regions. The largest of these is the transcription unit. This portion of the DNA will be used to produce RNA. Several complexes, known as transcription factors, are required for successful transcription. These complexes prepare the DNA for the successful binding of RNA polymerase. One RNA polymerase is bound, and other transcription factors complete the mature transcription complex. Now, energy must be added to the system for transcription to begin. This energy is provided by the reduction of ATP into ADP and Pi. RNA polymerase then synthesizes an RNA template from the strand of DNA. Most factors are released after transcription begins. When the end of the transcription unit is reached, the RNA polymerase dissociates, and the newly formed strand of RNA is released.

Translation – synthesis of a protein (polypeptide). Takes place on ribosomes, using the information encoded in messenger RNA

ATP (adenosine triphosphaate) – an energy-storage compound containing adenine ribose, and three phosphate groups. When it’s formed from ADP, useful energy is stored; when it it’s broken down (to ADP or AMP), energy is released to drive endergonic reactions

Phospholipids – lipid containing a phosphate group; important constituents of cellular membranes

Phospholipids bilayer cell membrane - a thin membrane made of two layers of lipid molecules.; these membranes are flat sheets that form a continuous barrier around cells.

The above definitions either came from the textbook glossary or:

Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License