Bio unit 1, doubts, notes and discussion :D

[U stalking ME]

ok ppl so who is giving bio on monday
Oh and check this site, it has some bio notes and answers to target sheets;
http://www.brain-freeze.co.uk/biologynotes.html

 

[¦HaLo¦]

meh

 

[nilu]

moi

 

[Simona]

awesome ...
i am =]
i cant fail this one ! x[
i have trouble with dna rna mrna and stuff like that !!!

 

[U stalking ME]

awesome ...
i am =]
i cant fail this one ! x[
i have trouble with dna rna mrna and stuff like that !!!

yea inshallah u wont
Go through the link mentioned above. Its quite helpful for dna, mrna etc

 

[DANGERBP]

=)

 

[U stalking ME]

=)

hows the prep?

 

[Simona]

bless you !

 

[U stalking ME]

bless you !

Thank u!!

 

[DANGERBP]

hows the prep?

goin okay ! =p you ?

 

[U stalking ME]

goin okay ! =p you ?

same here

 

[DANGERBP]

same here

kool =p=p

 

[xIshtar]

Good luck to everyone

Lets hope it's a good paper, like the January one xD

 

[Simona]

well if the january paper was easy, im afraid this 1 would be KILLING !
i have a question people ... i really dont understand the DNA REPLICATION thingy =[
any1 can help ?

 

[xIshtar]

well if the january paper was easy, im afraid this 1 would be KILLING !
i have a question people ... i really dont understand the DNA REPLICATION thingy =[
any1 can help ?

DNA replication, do you mean the steps which are involved in protein synthesis, or semi conservative replication?

 

[Simona]

the steps

 

[U stalking ME]

Good luck to everyone

Lets hope it's a good paper, like the January one xD

Good luck to u too and everyone else
Inshallah

 

[xIshtar]

the steps

mRNA is created from the antisense strand of the DNA, and is complementary to it. The DNA itself is unzipped, and nucleic acids line up against the DNA with hydrogen bonds forming between complementary bases. This part is called Transcription. Then, the mRNA moves out of the Nucleus and enters the ribosome, where anti codons on the tRNA are used to create a replica of the original DNA from the complementary RNA strand. These tRNA have amino acids attached to there other ends. Peptide bonds form between these amino acids, creating a protein. Which is translation.

If you want more details, just ask

 

[Simona]

i got it .. but like there is this experiment ryt ???
"meselson and this other dude's experiment .... now in may 2011 question 4 i have to draw some stuff .... how am i supposed to know were to do the lines and how ?

 

[xIshtar]

i got it .. but like there is this experiment ryt ???
"meselson and this other dude's experiment .... now in may 2011 question 4 i have to draw some stuff .... how am i supposed to know were to do the lines and how ?

Thats semi conservative replication

Which is when DNA helicase unzips the DNA, and the two strands are seperated. Then, free nucleotides which are complementary join up, forming hydrogen bonds, and creating a double helix due to DNA polymerase and ligase creating bonds.