Qualification > Sciences
ALL CIE BIOLOGY DOUBTS HERE !!!
Sue T:
--- Quote from: Hamlet on December 09, 2010, 03:05:09 pm ---Each cell in a female's body contains two X chromosomes, but one is 'inactive' or 'turned-off' through a normal process called X-inactivation.Because X-inactivation is random, in normal females the X chromosome inherited from the mother is active in some cells, and the X chromosome inherited from the father is active in other cells.
--- End quote ---
thank u v much both xplanations wer very helpful
Master_Key:
--- Quote from: The Secret on December 09, 2010, 09:43:02 pm ---Question, how do you prepare for a biology practical exam? [Paper 3]
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You performed the practicals once in the classes right?
**RoRo**:
--- Quote from: Master_Key on December 10, 2010, 01:31:26 pm ---You performed the practicals once in the classes right?
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Yup! But I'm asking what do I do before going for my test, at home, like the day before.
Amelia:
--- Quote from: The Secret on December 10, 2010, 02:26:53 pm ---Yup! But I'm asking what do I do before going for my test, at home, like the day before.
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Practice drawing cells-very thin cell walls if it's a plant cell and the more variety of cell structures you draw the better prepared you will be to draw any organelles that you may see on the day which you may recognize from practice.
And also you will be much more likely to label correctly.
- And revise food tests, make sure you know the procedure well and the results of the experiments well.
- Practise Graphs
- Go through your lab manual
Amelia:
--- Quote from: Sue T on December 10, 2010, 09:18:15 am ---thank u v much both xplanations wer very helpful
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My pleasure, Sue. ;)
And sorry for the late reply.
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