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Author Topic: CHEM AND BIO HELP AND TIPS HERE  (Read 357276 times)

Offline mdwael

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3075 on: June 07, 2010, 04:05:17 pm »
Quote from: aangel42 on June 07, 2010, 03:57:22 pm
I think I can understand what zarkajordan was thinking... Like if the decomposers breaking down the dead organism, nitrogen is released, but that doesn't enter the ATMOSPHERE, right? It enters the soil? Or the decomposer just eats up the nitrogen or something?
Or is decomposing just a type of food intake and it's breaking that down (like we break down carbs to glucose) for its energy so it's using up the nitrogen and other compounds making up the body of the organism, and releasing CO2 and H20?

Sometimes answers may be all correct, but you should choose the closest one and apparently Water and CO2 are always the products from decomposing. And since they mentioned atmosphere, that means nitrogen isnt there cuz ammonium and nitrates form in the soil by some decomposing bacteria.
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Offline The InViSiBlE GIrl (Eva)

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3076 on: June 07, 2010, 04:09:15 pm »
Hey guys is it possible if someone could paste a link of the copy for OCT/NOV 2009 PPR 1 pls!!!!!!! its not opening in FRee exams and even in extreme papers.com
Plssss help
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3077 on: June 07, 2010, 04:09:40 pm »
Quote from: Raywin on June 07, 2010, 03:58:40 pm
I found these hard Qs posted by some guy on SF.. :S i tried them out, prolly some REALY OLD PAPERS. there was NO ms.. :|

Why isn't it A? Now I think its A. Its has to be..
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3078 on: June 07, 2010, 04:10:43 pm »
Quote from: aangel42 on June 07, 2010, 04:07:28 pm
Two samples of a human enzyme were used in an experiment. Before they were used
           • sample X was heated to 80 C and then cooled to 37 C
           • sample Y was cooled to 0 C and then heated to 37 C.
How will this affect their activity?

A Sample X and sample Y are no longer active.
B Sample X and sample Y will be equally active.
C Sample X will be more active than sample Y.
D Sample Y will be more active than sample X.

Answer, please, and why?

D. This is because if sample X has been heated to 80*c, it would have denatured, it is useless. It wont be active. But, sample Y, however is cooled to 0*c, this doesnt denature it, only slows it. Thus, when heated back to 37*c, it will be more active. So the ans is D. :)
[/quote]
« Last Edit: June 07, 2010, 04:13:30 pm by Raywin »
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3079 on: June 07, 2010, 04:11:18 pm »
Quote from: Dizzy on June 07, 2010, 04:09:15 pm
Hey guys is it possible if someone could paste a link of the copy for OCT/NOV 2009 PPR 1 pls!!!!!!! its not opening in FRee exams and even in extreme papers.com
Plssss help

https://studentforums.biz/index.php/topic,54.msg231725.html#msg231725
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3080 on: June 07, 2010, 04:12:43 pm »
Quote from: aangel42 on June 07, 2010, 04:11:11 pm
That's what I was thinking at first too, but that's not tricky, lol, so maybe that's not right.
Raywin, maybe you should PM the guy who posted them or something, that way he'll get an alert and send you the answers? lol

He was a guest, i dont think hell be there.. :'(

:D
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Offline mdwael

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3081 on: June 07, 2010, 04:13:30 pm »
Quote from: aangel42 on June 07, 2010, 04:07:28 pm
Two samples of a human enzyme were used in an experiment. Before they were used
           • sample X was heated to 80 C and then cooled to 37 C
           • sample Y was cooled to 0 C and then heated to 37 C.
How will this affect their activity?

A Sample X and sample Y are no longer active.
B Sample X and sample Y will be equally active.
C Sample X will be more active than sample Y.
D Sample Y will be more active than sample X.

Answer, please, and why?


Answer is D ofcourse cuz x was heated to 80 degrees so it got denatured, Y jkst got cooled, that doesnt damage it it just makes it temporarly inactive and when its heated to 37 degrees it becomes active
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Offline Vin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3082 on: June 07, 2010, 04:13:35 pm »
Quote from: aangel42 on June 07, 2010, 04:11:11 pm
That's what I was thinking at first too, but that's not tricky, lol, so maybe that's not right.
Raywin, maybe you should PM the guy who posted them or something, that way he'll get an alert and send you the answers? lol

So what it ain't tricky.. Vasoconstriction is the decrease in diameter right? So y not straight forward A BOTH DECREASE ..?
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3083 on: June 07, 2010, 04:15:53 pm »
Quote from: ~VIN1094~ on June 07, 2010, 04:13:35 pm
So what it ain't tricky.. Vasoconstriction is the decrease in diameter right? So y not straight forward A BOTH DECREASE ..?

Hmmm, yeah i guess.. :/ i have neva craved this much for a MS.. :P
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3084 on: June 07, 2010, 04:16:20 pm »
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3085 on: June 07, 2010, 04:17:52 pm »
Quote from: aangel42 on June 07, 2010, 04:17:13 pm
true... it's possible...
what about raywin's other question? that's bugging me too now

Buckle up guys, more coming.. :'(
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Offline Raywin

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3086 on: June 07, 2010, 04:19:19 pm »
This one  >:(
:)
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Offline Weaam

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3087 on: June 07, 2010, 04:23:05 pm »
Ello ^^
If there is no trouble, can anyone plaese answer this --> M/J 06 Qs 29, 35, 37 Paper 1.
Thank youu.  ;D
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Offline The Golden Girl =D

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3088 on: June 07, 2010, 04:26:32 pm »
Quote from: Raywin on June 07, 2010, 04:19:19 pm
This one  >:(
:)

i believe it is C , well it's cuz after the person stops , ur depth of breathing is still deep cuz u have oxygen debt

got it ?
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Offline The InViSiBlE GIrl (Eva)

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Re: CHEM AND BIO HELP AND TIPS HERE
« Reply #3089 on: June 07, 2010, 04:28:09 pm »
I believe its C too!!!
Quote from: Raywin on June 07, 2010, 04:19:19 pm
This one  >:(
:)
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