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  1. A

    A-levels---help needed!

    Maths is okay, it's durable ( at least that is what I think) and since you like Maths,it should be fine and I would recommend you to take it. Like what the others say, keep your option wide. =) All the best!
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    Chemistry: Post your doubts here!

    They are two different things. Hydrogen bond is stronger than the latter. Hydrogen bond is define as an electrostatic attraction between a hydrogen atom and an unshared pair of electron from a very electronegative atom such as NITROGEN, OXYGEN AND FLUORINE ( only these three).
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    Chemistry: Post your doubts here!

    Ans: 1 and 2 [size=50]Ans: C[/size How to do the above questions? They are from Nov 08.
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    A level Biology: Post your doubts here!

    click here
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    A level Biology: Post your doubts here!

    Well, if cells are to divide whenever they want, they would grow into an irregular mass of cell, meaning a tumour would be formed. So elaborate that a lil. ^^
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    A level Biology: Post your doubts here!

    Thank you! Goodluck to you too!! Sleep early so you have adequate energy and sleep early can also reduce your anxiety...in a way.
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    Paper 53 Nov2011 chemistry answer discussion!!!!

    The funny thing is the anomalous point for divided by 16 and divided by 32 are the same. O_O
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    Paper 53 Nov2011 chemistry answer discussion!!!!

    At first I plotted that...but then I sensed something fishy and changed it back to divide the mass over 16. ..And table with pencil is fine!
  9. A

    Chemistry: Post your doubts here!

  10. A

    What's on your mind?

    Exams. >__< I am a inborn nervous-wreck!! Am finding a way to deal with it!
  11. A

    Chemistry: Post your doubts here!

    How do we identify which E cell equation to use? Some, for example Fe, has 3 E cell equations.Which one should i choose? Depending on what type of criteria?
  12. A

    Chemistry: Post your doubts here!

    When reacted with a small quantity of water, SiCl4 produces an oxychloride X, SixClyOz. The mass spectrum of X shows peaks at mass numbers of 133, 149, 247, 263 and 396. (You should assume that the species responsible for all these peaks contain the 16O, the 35Cl and the 28Si isotopes only.)...
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    A level Biology: Post your doubts here!

    I am not sure if I reply late but I thought O is always the recessive. It would barely shows unless it is recessive. As for a single base deletion, point mutation I'll call it. Base deletion will produce frame shift in a code. It might delete the gene coding for the shape of the active site or...
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    A level Biology: Post your doubts here!

    I think it is the chemical diffuses down the stem and passes from cell to cell via active transport to the lateral bud.
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    A level Biology: Post your doubts here!

    Before mitosis takes place, the chromosome number is doubled. Originally, cells that practice mitosis will have 46 chromosomes. Before mitosis, they would have 92 chromosome. And the the number would be halved by the end of mitosis. In telephase, two daughter cells are formed, each having 46...
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    Hello everyone, a Chinese Girl new here!

    Hey there~ I am somewhat new here also. 看到汉字，我可兴奋了。你好啊！
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    BIOLOGY practicals help

    The control for enzyme related experiment is not to involve enzyme in the experiment.
  18. A

    A level Biology: Post your doubts here!

    Is process of gene sequencing in the syllabus?
  19. A

    BIOLOGY practicals help

    How to draw a plan plant cell diagram? Any examples for that?
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    grades help in mathematics AS pure and mechanics read below

    Re: grades help in mathematics AS pure and mechanics read be Well, it depends. If your grade for Maths Paper 1 is a strong B, meaning 75 and above. You will have the chance to get an A, provided that you did well in Mechanics. The mark percentage taken for mechanics is actually smaller than...
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