Qualification > Sciences

Biology Paper 1

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Kim:
cud sum1 explain  the nitrifying denitrifying nitrogen fixing bacteria?
wat does the nucleus in every body cell of a male contain?
X allele
y allele
y chromosome
y gene

kam:

--- Quote from: me...myself...n...i on June 04, 2009, 03:02:25 pm ---
--- Quote from: abcdef on June 04, 2009, 02:26:41 pm ---There is no paper 1 for biology from May 2002 - May 2000 on freeexampapers or xtremepapers.
Can anyone help me to get those papers ? :)

Thank you.

--- End quote ---

I sent the bio pprs to u..........=]

--- End quote ---

can  u send em to me too

Mastermind:

--- Quote from: kim on June 04, 2009, 03:31:08 pm ---cud sum1 explain  the nitrifying denitrifying nitrogen fixing bacteria?
wat does the nucleus in every body cell of a male contain?
X allele
y allele
y chromosome
y gene

--- End quote ---
Denitrifying bacteria is the bacteria that undo the work done by nitrifying bacteria. They turn nitrates & ammonia in the soil to nitrogen gas, which goes into the atmosphere.
In a male nucleus, there are 46 XY chromosomes. Allele - X Allele - Y
hope that helps xD

Kim:

--- Quote from: Mastermind on June 04, 2009, 03:37:44 pm ---
--- Quote from: kim on June 04, 2009, 03:31:08 pm ---cud sum1 explain  the nitrifying denitrifying nitrogen fixing bacteria?
wat does the nucleus in every body cell of a male contain?
X allele
y allele
y chromosome
y gene

--- End quote ---
Denitrifying bacteria is the bacteria that undo the work done by nitrifying bacteria. They turn nitrates & ammonia in the soil to nitrogen gas, which goes into the atmosphere.
In a male nucleus, there are 46 XY chromosomes. Allele - X Allele - Y
hope that helps xD

--- End quote ---
but its a MCQ i need one answer is it Allele x or y?

Mastermind:
OH ma bad lol
Its Y - Allele

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