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Search results
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How are Chemistry, Biology and Physics AS marks calculated?
In Chemistry, Biology and Physics, there are 3 components, paper 1, 2 and 3. Paper 1 = 40 Paper 2 = 60 Paper 3 = 40 40 + 60 + 40 = 140 But in grade treshold PDF files available in Xtreme Papers, it says that AS Levels account for 130 marks and A2 account for 130 (which is true with 100 + 30, 2... -
Duaa's to Help in Examinations =)
Thank you for the tag. And may Allah (SWT) grant us all success. -
A level Biology: Post your doubts here!
You forgot to draw the plasmodesmata. -
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A level Biology: Post your doubts here!
1. It does secrete an anticoagulant both times. But the anticoagulant does not contribute to the transmission of Malaria in the first bite of the infected person. It is only significant when the infected mosquito, with the pathogen now having infected it and reached its salivary glands, bites an... -
AS LEVEL BIOLOGY... discuss here AS students only :)
I'm gonna guess that you meant transpiration by "water movement" The potometer measures the rate of water uptake, not the rate of transpiration, and not all the water that the plant takes up is transpired. Some of the water is used in photosynthesis, some to maintain the turgidity of cells, so... -
AS LEVEL BIOLOGY... discuss here AS students only :)
Actually, in one paper, I felt like I was doing Chemistry, they asked to draw two amino acids bonded together in a peptide bond, and describe the peptide bond, and also they asked about the phosphodiester bond. On a side note, does anyone have any problems with those "With reference to... -
A level Biology: Post your doubts here!
70s and 80s are two types of ribosomes, 70s are smaller and are present in bacteria ( i think :D ) and 80s are larger and present in animals. -
AS LEVEL BIOLOGY... discuss here AS students only :)
Yup they are, and they come pretty often. -
AS LEVEL BIOLOGY... discuss here AS students only :)
Seems everybody masters Biology LOL no one has a doubt. -
A level Biology: Post your doubts here!
Make a thread yourself :P I am AS as well. -
A level Biology: Post your doubts here!
I'm guessing you need that so you can draw the cell to scale. First measure, choose the limits of your drawing, but on one axis only, say you take the height for example, measure a reasonable height on your paper, you can choose this height, but make sure it's taking most of the space given... -
Chemistry : P1 and P2 doubts only (Only AS allowed)
Who here is taking Bio? -
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Chemistry : P1 and P2 doubts only (Only AS allowed)
True, some guy sent me a website for leaked papers, didn't even open it... and reported him, this is just shameful. -
Chem AS p21/22/23
mrnt3250 I don't think F2 can undergo free radical substitution. F-F bond has a very high bond energy to be broken by UV. -
Chemistry : P1 and P2 doubts only (Only AS allowed)
I can't really... Sorry. But check here http://www.chemguide.co.uk/mechanisms/nucsub/hydroxide.html#top -
Chemistry : P1 and P2 doubts only (Only AS allowed)
Depends on the reaction... Whether it is neucleophilic substitution or electrophilic addition. However, I cannot draw it right now, I'm struggling to prepare myself :( -