Qualification > Sciences

AS biology edexcel help!!!!!!!!!!!!!!!!!!!!!!!!!!!!

<< < (2/2)

Dreams <3:
Transcrption:
-when RNA polymerase attached to the double helix of the DNA in a region of the gene that is being expressed
-hydrogen bonds are broken down, part of DNA unwinds
-a strand acts as a template and is copied by base pairing nucleotides so a complemantary polyneucleotide strand of mRNA (caused by RNA polymerase)
-mRNA is detached from the coding strand of DNA, it leaves the nucleus through pores into the cytoplasm to the ribosomes.

Translation:
-mRNA attaches to the ribosomes and held in such a way that codons are exposed
-tRNA carry a specific amino acid
-anticodons on tRNA bind to codons on mRNA forming peptide bond between amino acises
(ribosomes move relative to mRNA until a stop codon is reached)

Hope I helped

Kim:
hey u guyz thank u so much!!!!!!!!!!!!
u guyz are life savers
ROCK ON!

Navigation

[0] Message Index

[*] Previous page