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lola sweet yup..Did you see how stupid cie can be sometimes..i went haywire seeing the ms..https://docs.google.com/viewerng/vi...wp-content/uploads/2012/11/9700_s14_qp_21.pdf
https://docs.google.com/viewerng/vi...wp-content/uploads/2012/11/9700_s14_ms_21.pdf
Q4)b)i) I dnt get hw this qs and the markscheme answer is related
I mean why isnt it abt the b cell dividing into plasma cells and all
why this
Midnight dream is this the same qs?
Nope it was there but they removed it
ikr but Alhamdulillah i got itlola sweet yup..Did you see how stupid cie can be sometimes..i went haywire seeing the ms..
still confused abt it?
Thanks bro
thnksNope it was there but they removed it
ikr but Alhamdulillah i got it
I personally hated this question.
You probably chose C as well, since minimum membranes CO2 passes through should be 4, (2 through capillary, 2 through squamous epithelial cell of alveolar wall). We learnt the three modes of CO2 transport, and the molecule remaining in blood plasma would be the case of minimum membrane crossing situation.
And oxygen, I thought, should be 5 since we're taught it goes into red blood cell and binds with haemoglobin. However, here's what the examiner's gotta say:
"Those candidates who realised that the question asked for the minimum number of cell membranes crossed by a molecule of oxygen and a molecule of carbon dioxide when passing to or from the alveoli to the capillary knew that 4 was correct for both. Option C was incorrectly selected by many candidates, but oxygen only passes through 5 membranes when it enters the red blood cell."
I might be over-reacting but come on! We never learnt oxygen had the choice to just not go into the RBC and choose not to bind with haemoglobin!
(Or at least I didn't...)
So you know the formula Magnification=size of image/size of object.
and they stated this 'The length of the chloroplast from X to Y is 5000nm.' and have given you a figure.
So if you measure that length in the figure you would get about 5cm=50mm=50,000micrometer=50,000000 nanometre.
Then this value 50000000 is the size of image and you have been given the size of object as 5000nm, just place them in the formula!
You will get the answer as 10,000. And that would be C.
I hope that helps.
And btw I think Bio ( as compared to others like Physics and Chem) paper is easier, just make sure that you know the chapter properly and make notes when doing MCQ's that helps you to revise important points. ( I made notes for two chapters if you want I can share
I was just confused with the conversions. :/ Yes, please share! That'd be even more helpful. HiHey, thanks! Yeah, I find bio the least hard
This helped clarify that so thank you!
Welcome.
i lost all the 4 marksNope it was there but they removed it
ikr but Alhamdulillah i got it
i did too :/ But it happens
i did too :/ But it happens
before u 2 do anything, no chat room againYou lose some and gain some.
Keep working hard!
Yes,because that's to be done my wall hain? XDbefore u 2 do anything, no chat room again
i m sorryPlease no please no
Don't make FOUR pages of chats!
Hahahaha u kinda didLol it's okay sorry if I sounded too serious
Okay they do decrease by 60%, but then why not B :S
the ms answers are too weird
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