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A level Biology: Post your doubts here!

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yes it does not finish as the absorption goes to plateau above the zero value
I think you didn't understand what I'm trying to say. The thing is DCPIP becomes colourless but in the presence of chlorophyll shouldn't it remain green? As a result, the absorption will be at a higher level than zero. Also, the plateau reaches constant value of 0.6 au (I think) at 7.9 (or earlier) right?
 
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I think you didn't understand what I'm trying to say. The thing is DCPIP becomes colourless but in the presence of chlorophyll shouldn't it remain green? As a result, the absorption will be at a higher level than zero. Also, the plateau reaches constant value of 0.6 au (I think) at 7.9 (or earlier) right?
yes i understood and i wrote something to that affect.
 
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guys who did p22.....what was the order of the numbers? was it 3-4-5? and was cell 1 in telophase or was it anaphase?
 
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The whole exam was kinda weird, with so many suggest questions, it was quite tricky
it wasn't bad man...honestly i havent spent too much time studying bio and i expected to write utter shit in the exam (excuse my words) but it turned out really well (ofc some mistakes here and there) but hopefully the Marking Scheme is in our favor (same with the threshold and paper 1)
 
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what i wrote is it is a carbohydate macromolecule made up of amonomers knows as monosaccharide
BUT YOU had to refer to glyosidic bonds and thingy
Not necessary for glycosidic bonds, it was for only 2 marks
I wrote about it being formed by condensation reaction by the liniking of monosachrides with the removal of water molecule
 
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what did to guys write about the respiratory system
Trachea- C shaped windpipe with cartillage
Bronchus-Structures with smooth muscles and some cartillage
Bronchiole-Does not contain cartillage and smooth muscle
Alveoli- Greater surface area for gaseous exchange, contains elastic fibres and collagen. Elastic fibres stretch to allow greater diffusion of gases
 
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