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March 30, 2024, 12:25:09 am

Author Topic: VCE Biology Question Thread  (Read 3571765 times)  Share 

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Scribe

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Re: VCE Biology Question Thread
« Reply #10455 on: June 11, 2018, 01:13:47 pm »
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Thanks for the clarification PhoenixxFire!  :D

PopcornTime

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Re: VCE Biology Question Thread
« Reply #10456 on: June 11, 2018, 02:07:33 pm »
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When describing transcription and translation, do we need to say that pre-mRNA is synthesised in the 5' to 3' direction?

PhoenixxFire

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Re: VCE Biology Question Thread
« Reply #10457 on: June 11, 2018, 02:16:59 pm »
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When describing transcription and translation, do we need to say that pre-mRNA is synthesised in the 5' to 3' direction?
Yes. You can word it differently depending on how you write it but you need to include it somewhere.
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PopcornTime

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Re: VCE Biology Question Thread
« Reply #10458 on: June 11, 2018, 04:16:55 pm »
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Are there any other reasons as to why the lac operon breaks down lactose apart from using glucose as an energy source?

vox nihili

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Re: VCE Biology Question Thread
« Reply #10459 on: June 11, 2018, 06:49:27 pm »
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Are there any other reasons as to why the lac operon breaks down lactose apart from using glucose as an energy source?

Not that Ican think of
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PopcornTime

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Re: VCE Biology Question Thread
« Reply #10460 on: June 11, 2018, 08:40:03 pm »
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Not that Ican think of

Lactose is made up of glucose and galactose, so do you think galactose is of any use?

vox nihili

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Re: VCE Biology Question Thread
« Reply #10461 on: June 11, 2018, 08:47:40 pm »
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Lactose is made up of glucose and galactose, so do you think galactose is of any use?

Likely yes
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PopcornTime

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Re: VCE Biology Question Thread
« Reply #10462 on: June 13, 2018, 06:28:30 pm »
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When the repressor protein binds to the operator region, does RNA polymerase still bind to the promoter region but it just can't move across the structural genes?

Or would it be better to say that the repressor protein blocks RNA polymerase from binding to operator region?

darkz

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Re: VCE Biology Question Thread
« Reply #10463 on: June 13, 2018, 06:36:51 pm »
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When the repressor protein binds to the operator region, does RNA polymerase still bind to the promoter region but it just can't move across the structural genes?

Or would it be better to say that the repressor protein blocks RNA polymerase from binding to operator region?

The repressor which binds to the operator, hence blocking RNA polymerase from binding to the promoter region
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PopcornTime

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Re: VCE Biology Question Thread
« Reply #10464 on: June 13, 2018, 07:45:00 pm »
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The repressor which binds to the operator, hence blocking RNA polymerase from binding to the promoter region

Does it really block it from binding to the promoter region though? Cause the repressor protein binds to the operator, which is on the right of the promoter. So isn't it more correct to say that the repressor prevents it from moving along the structural genes?

See photo attached.

Scribe

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Re: VCE Biology Question Thread
« Reply #10465 on: June 13, 2018, 08:06:34 pm »
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Does translation occur in the cytoplasm or ribosomes? Which is preferred as an answer?

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Re: VCE Biology Question Thread
« Reply #10466 on: June 13, 2018, 08:08:45 pm »
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Does translation occur in the cytoplasm or ribosomes? Which is preferred as an answer?

Well ribosomes are in the cytoplasm, so if you want to be safe, just say translation occurs on the ribosomes in the cytoplasm
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Sine

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Re: VCE Biology Question Thread
« Reply #10467 on: June 13, 2018, 08:12:09 pm »
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Does translation occur in the cytoplasm or ribosomes? Which is preferred as an answer?
ribosomes should be enough.

Saying ribosomes in the cytoplasm discounts translation occuring in the RER so just saying ribosomes would be more appropriate.

darkz

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Re: VCE Biology Question Thread
« Reply #10468 on: June 13, 2018, 08:14:49 pm »
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Does it really block it from binding to the promoter region though? Cause the repressor protein binds to the operator, which is on the right of the promoter. So isn't it more correct to say that the repressor prevents it from moving along the structural genes?

See photo attached.

Well at a VCE level, I'm pretty sure that you can just say that because the repressor binds to the operator blocking RNA polymerase from binding to the promoter, therefore it is unable to move along the structural genes.
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Re: VCE Biology Question Thread
« Reply #10469 on: June 13, 2018, 08:23:03 pm »
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Could someone list the specific steps in translation that would be approved by VCAA? Thanks as always :D