Biology 1A - Lecture 6: Cellular metabolism and biological c

General Biology Lecture

Category:

Education

Tags:

• uc
• berkeley
• ucberkeley
• webcast.berkeley
• cal
• Spring 2010

[SharathCK]

Undergrad teachers at Berkeley are really good in comparison to other colleges (*cough* MIT *cough*). Makes me wish I applied here.

[TheMarlon2012]

I'm in high school taking AP Biology and this video really help to understand better about this stuff. Thumbs up. :)

[ForeverHidden626]

i hate you. i hate you. i hate you. my brother loves u but i hate you. he wants to marry you. i hate both of you. have a nice hunny moon suckers!!!!!!!!!!!!!!!!!!!!!!1

[ForeverHidden626]

@TheMarlon2012 I'm in highschool & nobody give's a shit fool. shut up!

[NorthForkFisherman]

@MsAgnosticatheist "Molecular Biology Made Simple and Fun, 3rd ed" By Lewis is a good one. And of course, this string of videos. They use the same book (Campbell, but slightly different ed) at JCCC, here in Kansas.

[chroniclerofthe70s]

@MsAgnosticatheist I suggest a college freshman level Biology textbook which are generally comprehensive and often include an introductory chapter(s) on general chemical structures and principles. I suggest supplementing with semi-technical publications such as Scientific

American, Discover, or Popular Science. Good luck.

[MsAgnosticatheist]

@chroniclerofthe70s What are some good books, videos, etc. sources you recommend for layman?

[Denkverbrecher]

Cool, i have cut a fly in half with my scissors! What a dumb ass of a fly sitting on my shooldesk! But she is fine! She only cant fly anymore.

Now we can learn togheter! :)

[farzanatasneem]

By current estimates, there are approximately 1000 genes in humans that encode miRNAs. Transcription of miRNA genes produces primary microRNA transcript (pri-miRNA), which is processed within the nucleus to form another structure, called pre-miRNA.With the help of specific transporter proteins, pre-miRNA is exported to the cytoplasm. Additional "cutting" by an enzyme, appropriately called Dicer, generates mature miRNAs that are about 21 to 30 nucleotides in length.(hence the name "micro").

[farzanatasneem]

A very large number of genes do not encode proteins. Instead, their products play important regulatory functions. The most recent among this class are genes that encode small RNA molecules, so-called microRNAs (miRNAs). miRNAs, unlike other RNAs, do not encode proteins but instead inhibit gene expression..Silencing of gene expression by miRNA is preserved in all living forms from plants to humans and therefore must be a fundamental mechanism of gene regulation.

[chroniclerofthe70s]

@farzanatasneem Correction of your statements? Why embarrass yourself any further to other YT readers with your comments.

Protein synthesis takes place only in the cytoplasm.

First, histones must be dissociated from DNA in chromatin as part of eukaryotic DNA replication,

synthesis, and transcription.

Secondly, mRNA is processed by removal of introns and strand end modifications before it is

transferred into the cytoplasm.

Prokaryotic cells do not contain organelles.