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biology paper 1 doubts
ive seen it in a past paper it is telophase and btw for the membrane question, to put it in simple terms, 02 and co2 CAN diffuse thru the membrane so the function of the phospholipids is to allow the passage of these 2 gases, hence option a was wrong. the question asked what is NOT a property... -
biology paper 1 doubts
how was the option phrased exactly? i forgot anyways nothing we can change -
biology paper 1 doubts
yea i chose d as well, u see water channels are beyond the scope of our syllabus (its my first time hearing bout them). i quote from a level bio textbook: "the respiratory gases, 02 and co2, cross membranes by diffusion. they are uncharged and non-polar, and so can cross thru the phospholipid... -
biology paper 1 doubts
no water is the only ionic substance that can diffuse thru, and co2 + o2 pass thru by diffusion, ive seen that before in past papers and ive learnt that as well -
biology paper 1 doubts
i chose the option where it said it bind to water to stabilise the membrane. this function is carried out by the glycolipids and not the phospholipids. thats why they borught 2 options we were not familiar with -
biology paper 1 doubts
pressure in veins was b the 1 where skeletal muscles dont contract at rest the 1 with a graph for pressure of heart the answer was b the last 1 was d the type of immunity for dead bacteria was artificial active immunity the 1 for the plant in solution x and then y, the answer was a the... -
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Last 3 days for Physics P4- Post your doubts
what is the '2006,2008,2009' pattern -
Last 3 days for Physics P4- Post your doubts
change in potential energy (height) is what we are looking for and not the total potential energy after so there is no need to add. you could work out total potential energy before then total after and find difference, in that case the final potential energy is f(r+4cm) -
HOW WAS CHEMISTRY PAPER 22 ?
how can carbon form 6 bonds if its an aldehyde :S -
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HOW WAS CHEMISTRY PAPER 22 ?
yea maan only b had a colour change xD.. for equilibrium it was (2x)^2/(0.02-x)^2=59 right? and decrease in temperature favours the forward reaction, pressure has no effect ey? -
HOW WAS CHEMISTRY PAPER 22 ?
exactly what i said :)..and there was only 1 colour change for organic? -
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Stats 62 today!
i think max loss is 2.. 1 mark for saying 8!, 1 mark for x5 and 1 mark for correct answer. so u might lose 2 -