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A-level Biology Edexcel A(Salters-Nuffield) 2019

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What did people do for the tick and cross-question on brain scans/tumours?? I put both ticks

I remember reading MRI shows tumours so ticked that but wasn’t sure on CT and guessed and put a cross but I think you’re right... wish i ticked it instead ahah

Reply 61

azozarmen

I changed both of them into standard metres cuz it's easier to work with. 2.5cm=2.5x10^-2m, 5nm=5x10^-9m. 2.5x10^-2/5x10^-9 = 5x10^6

Original post by Wado123

x5,000,000?? Lord have mercy the answer was x5000.... 2.5 cm = 25,000 nm... actual size is 5nm, 25,000/5 is 5000.

Five million is like electron micrograph subatomic particle territory...

Reply 62

Stressedoutxxx

How is everyone revising for the scientific article? When answering questions on it will you have to refer to it a lot? I feel like any question they can ask on it will have to be from the spec anyway and you’ll have the knowledge to answer it without looking at the article?

Reply 63

Ccyxxx

2.5cm =25mmx1000= 25000UM micrometres then x1000 = 25000000 nm/ 5= 5000000

Original post by Wado123

x5,000,000?? Lord have mercy the answer was x5000.... 2.5 cm = 25,000 nm... actual size is 5nm, 25,000/5 is 5000.

Five million is like electron micrograph subatomic particle territory...