biology a level help?:(
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lqwerty98
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Reality Check
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(Original post by lqwerty98)
what is the difference between a promoter and a primer?
what is the difference between a promoter and a primer?
A primer can be all sorts of things - a short segment of DNA which allows DNA synthesis to proceed on the lagging strand, something used during the PCR reaction, etc.
A promoter is an area of a gene involved in its expression - the clue to what it does is in the name.
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wolfmoon88
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(Original post by Reality Check)
About the only thing they share is an initial letter.
A primer can be all sorts of things - a short segment of DNA which allows DNA synthesis to proceed on the lagging strand, something used during the PCR reaction, etc.
A promoter is an area of a gene involved in its expression - the clue to what it does is in the name.
About the only thing they share is an initial letter.
A primer can be all sorts of things - a short segment of DNA which allows DNA synthesis to proceed on the lagging strand, something used during the PCR reaction, etc.
A promoter is an area of a gene involved in its expression - the clue to what it does is in the name.
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Reality Check
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lqwerty98
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wolfmoon88
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(Original post by Reality Check)
Yes, that could be a difference between the two
- but without the OP giving us a bit more detail where the question has come from we're not quite sure what response is being sought.
Yes, that could be a difference between the two


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Aplens
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wolfmoon88
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(Original post by Aplens)
In what sense? RNA polymerase attaches to the beginning of the gene?
In what sense? RNA polymerase attaches to the beginning of the gene?
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LennyBicknel
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(Original post by Reality Check)
Yes, that could be a difference between the two
- but without the OP giving us a bit more detail where the question has come from we're not quite sure what response is being sought.
Yes, that could be a difference between the two

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Gerry-Atricks
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(Original post by Reality Check)
About the only thing they share is an initial letter.
A primer can be all sorts of things - a short segment of DNA which allows DNA synthesis to proceed on the lagging strand, something used during the PCR reaction, etc.
A promoter is an area of a gene involved in its expression - the clue to what it does is in the name.
About the only thing they share is an initial letter.
A primer can be all sorts of things - a short segment of DNA which allows DNA synthesis to proceed on the lagging strand, something used during the PCR reaction, etc.
A promoter is an area of a gene involved in its expression - the clue to what it does is in the name.
And the last two ?
And the fourth?
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Reality Check
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(Original post by LennyBicknel)
Semi-relevant question, but what's the difference between an operator and promoter region (i.e. on an operon)? I written down that, as you've said, a promoter is the side where RNA polymerase binds for transcription, whilst the operator turns the genes on and off..? How does that work? I know that repressor proteins can bind to the control site, but beyond that I don't particularly understand operators..
Semi-relevant question, but what's the difference between an operator and promoter region (i.e. on an operon)? I written down that, as you've said, a promoter is the side where RNA polymerase binds for transcription, whilst the operator turns the genes on and off..? How does that work? I know that repressor proteins can bind to the control site, but beyond that I don't particularly understand operators..
Have a look at the lac operon - this is quite a common example.
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Reality Check
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Gerry-Atricks
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(Original post by Reality Check)
(bell-end). How are you doing, buddy? Finished your exams yet, or still more to go?

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Reality Check
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#14
(Original post by glad-he-ate-her)
8 more to go , made a dent and done 5 and thanks for the pet name, suits me
8 more to go , made a dent and done 5 and thanks for the pet name, suits me

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Gerry-Atricks
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(Original post by Reality Check)
I knew you'd like it - because you don't take yourself too seriously.
. Hope they're going well.
I knew you'd like it - because you don't take yourself too seriously.

Whats the point in taking yourself seriously?
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