Qualification > Sciences
ALL CIE BIOLOGY DOUBTS HERE !!!
$H00t!N& $t@r:
can someone please draw an outline of how you would draw a table for question 1b(i) m/j 2007 31 without the values...just the column headings.
Here is the link: http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_s07_qp_31.pdf
Master_Key:
--- Quote from: $H00t!N& $t@r on May 05, 2011, 08:20:24 am ---can someone please draw an outline of how you would draw a table for question 1b(i) m/j 2007 31 without the values...just the column headings.
Here is the link: http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_s07_qp_31.pdf
--- End quote ---
place 2 cm3 of distilled water in a test-tube.
• add 2 cm3 of starch solution.
• add 0.5 cm3 of amylase and start timing.
• after five minutes add four drops of iodine solution and shake gently.
So we got
Note:- Keep the time for the experiment constant as for example 5 minutes for Amylase to work on Starch.
VOLUME OF STARCH ADDED
VOLUME OF AMYLASE ADDED
CONCENTRATION OF LEAD NITRATE ADDED
TIME TAKEN FOR STARCH TEST TO OBTAIN RESULT / TIME TAKEN FOR BLUE-BLACK COLOUR TO DEVELOP
$H00t!N& $t@r:
Is the concentration of lead nitrate meant to be in % ?
Is it going to be something like this: volume of lead nitrate
---------------------- x 100
volume of (lead nitrate + water)
Master_Key:
--- Quote from: $H00t!N& $t@r on May 05, 2011, 07:33:34 pm ---Is the concentration of lead nitrate meant to be in % ?
Is it going to be something like this: volume of lead nitrate
---------------------- x 100
volume of (lead nitrate + water)
--- End quote ---
If the question has it in % then take it in %.
For eg. 1% CuSo4 is 1% of mass of solution not necessarily volume.
Vampire-Love4ever:
Method of measuring curvature?
Specimen Paper 5-2007, Q2: mentioned in the marking scheme.
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