cell nucleus

What:

"The cell membrane is the same as a computer chip with individual receptors as the keys on the keyboard. The cell nucleus is like the hard drive that contains the software. If you remove the floppy disk that installed the program, the computer still works and you can select which software program you want to use at the moment."

Writer: Not Stated

LCC:

Where:

Date: Feb 12 2014 12:58 PM

What:

"According to Karp, the RNA polymerase is capable of adding 20 to 50 nucleotides per second to the growing mRNA chain. Electron microscope images suggest that there can be over a hundred RNA polymerases operating simultaneously. So the cell nucleus is like a programmed factory for mRNA with over 100 parallel assembly stations. Each station can build a 400 unit mRNA chain in 10 to 20 seconds."

Writer: Rod Nave, Ph.D.

LCC:

Where:

Date: Feb 12 2014 12:54 PM

What: "I guess you could say the cell nucleus is like city hall in that it is the main information center of the cell. It controls most of the cell or "city" by sending out necessary information for the cell to function. Also, the nucleus or "city hall" governs what can be let in and out of the cell sort of like letting the gatekeepers know what can be let in and out of the city walls."

Writer: Shannen L

LCC:

Where:

Date: Feb 12 2014 1:02 PM

What: "The cell nucleus is like an overcrowded archives, with DNA and proteins wound and twisted into dense packages, called chromatin. Now a series of experimental results, including one reported in this issue (p. 614), is sketching a new picture of this archive and how a protein called the linker histone helps to manage it, by either granting or denying the cell's gene-regulating proteins access to particular sequences."

Writer: Elizabeth Pennisi

LCC:

Where:

Date: Feb 12 2014 1:03 PM