ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Biology => Topic started by: MisterTransistor on October 29, 2012, 10:34:29 pm

Title: Transcription Help
Post by: MisterTransistor on October 29, 2012, 10:34:29 pm

During transcription, when a section of the double stranded DNA molecule in the nucleus is unwound, is RNA polymerase responsible for this unwinding? Or is there another enzyme involved? The reason I ask is because I've always been under the impression that RNA polymerase was responsible for this, but I just recently read in the Neap Biology Unit 4 advantage book that helicase unwinds and unzips DNA during transcription., so I'm sort of confused now.

Title: Re: Transcription Help
Post by: ggxoxo on October 29, 2012, 10:44:39 pm

Anyways my post disappeared... so basically your right...

DNA replication it is helicase that unwinds DNA

For transcription it is RNA polymerase

As far as my TSFX notes, Knox book are concerned... :)

Title: Re: Transcription Help
Post by: MisterTransistor on October 29, 2012, 10:57:41 pm

Awesome. It looks like they've made an error in the neap book then.

Title: Re: Transcription Help
Post by: curry_bro on October 31, 2012, 09:09:34 am

i got a bit confused as well. i consulted a first year uni bio book and found the answer.
helicase is only for dna replication, and as ggxoxo said, rna polymerase unwinds dna during transcription