Qualification > Sciences
CHEM AND BIO HELP AND TIPS HERE
mdwael:
--- 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?
--- End quote ---
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.
The InViSiBlE GIrl (Eva):
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
Vin:
--- 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.. :|
--- End quote ---
Why isn't it A? Now I think its A. Its has to be..
Raywin:
--- 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A Sample X and sample Y are no longer active.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?
--- End quote ---
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]
Vin:
--- 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
--- End quote ---
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