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OCR Biology F215 Control, Genomes and Environment Fri 15 June 2012

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Reply 1000
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ds4143
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Original post by otrivine
do you mean the binding sites?


Nope, well binding site is a part of it, but there are 3 specific named parts of the lac operon that do different things.

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Reply 1001
Avatar for Sparkzz
Sparkzz
4
Original post by otrivine
in my book page 24 is on F214?????????
are u using a different book cause in the ocr does not mention !?
more please :wink:
ok let me give you some as well so did i get 7/10 ?
1)Suggest Name 2 ways to treat sickle cell and what amino acid is replaced (3)
2)what do you understand by the term Restriction enzyme (1)


Sorry page 124.


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Original post by ds4143
Nope, well binding site is a part of it, but there are 3 specific named parts of the lac operon that do different things.

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do you mean Z X Y?
Original post by Sparkzz
Sorry page 124.


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oh yes thanks i will revise that page again :smile: can you give me more question
Reply 1004
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ds4143
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Original post by otrivine
do you mean Z X Y?


Lol sorry im not wording the question right. Im talking about the parts if the operon...the structural region, promoter region and the operator region

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Original post by ds4143
Lol sorry im not wording the question right. Im talking about the parts if the operon...the structural region, promoter region and the operator region

This was posted from The Student Room's Android App on my HTC Desire HD A9191


oh sorry :frown:
the functions for promoter region is to bind with RNA polymerase to allow transcription of enzyme B galactosidase and lactose permisrase
Operator region is where the repressor protein binds
Strucutral region is the switiching of genes on or off
Reply 1006
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ds4143
1
Original post by otrivine
oh sorry :frown:
the functions for promoter region is to bind with RNA polymerase to allow transcription of enzyme B galactosidase and lactose permisrase
Operator region is where the repressor protein binds
Strucutral region is the switiching of genes on or off



The promoter region is correct, but the other two are slightly wrong ...

Structural gene - codes for enzymes, b-galactosidase and lactose permease
Operator region - switches the structural genes on or off.

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Original post by ds4143
The promoter region is correct, but the other two are slightly wrong ...

Structural gene - codes for enzymes, b-galactosidase and lactose permease
Operator region - switches the structural genes on or off.

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true about strucutral but operator i wrote is correct according to the book it says is where the repressor protein binds?
Reply 1008
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ds4143
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Original post by otrivine
true about strucutral but operator i wrote is correct according to the book it says is where the repressor protein binds?


Oooh right, I see where your coming from, sorry you are right! But if you can see the bottom on page 112 theres 3 bullet points, check that too if ya want. I think it explains it abit better that what I can

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How much do we need to know about gibberelins page 225? Does anyone have any summary sheets for this because that page rally confuses me!
Original post by ds4143
Oooh right, I see where your coming from, sorry you are right! But if you can see the bottom on page 112 theres 3 bullet points, check that too if ya want. I think it explains it abit better that what I can

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oh yes true :wink:
thanks
ok
State two ways in which we can treat sickle cell anemaia(2)
Reply 1011
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ds4143
1
Original post by otrivine
oh yes true :wink:
thanks
ok
State two ways in which we can treat sickle cell anemaia(2)


Ahh um blood transfusion? Not too sure

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Original post by ds4143
Ahh um blood transfusion? Not too sure

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yes and stem cells
my turn
Reply 1013
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ds4143
1
Original post by otrivine
yes and stem cells
my turn


Ooh okay good question, thanks

Why does apoptosis not damage nearby cells and tissues?

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Original post by ds4143
Ooh okay good question, thanks

Why does apoptosis not damage nearby cells and tissues?

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good question too and is tough

Because it is controlled by cell signalling ?
Reply 1015
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ds4143
1
Original post by otrivine
good question too and is tough

Because it is controlled by cell signalling ?


Hmm I think thats right .. but i checked the answer in the book, and it just says because the hydrolytic enzymes involved in apoptosis are enclosed in vesicles, and are also ingested by phagocytes after the cell has been broken down.

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Original post by chemicalX
sorry for the stupid question but are these ocr?

cheers


Yep, all these question are OCR examples. Some are off the old syllabus as the new one hasn't been around that long.
Reply 1017
Avatar for CGB
CGB
4
Can anyone explain the species concept stuff to me? I've read the spread on pages 142-143 loads of times but it's just not going in. None of it makes any sense to me. :frown:
Original post by ds4143
Hmm I think thats right .. but i checked the answer in the book, and it just says because the hydrolytic enzymes involved in apoptosis are enclosed in vesicles, and are also ingested by phagocytes after the cell has been broken down.

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so is it acceptable or not ?
Guys, ask me questions! :smile:

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