Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012

i should be revising for chemistry unit and 2 but here i am instead on TSR ........... defiantly not the key to success

lol,haha me too.
you should come on later after you have revised...we usually ask each other questions and then mark them from a mark scheme..
that way revision is less boring and you get to chat

lol thanks around what time?

yeah,thats fine
i'll ask joey if he wants to do some questions

yeah,thats fine
i'll ask joey if he wants to do some questions

explain 3 differences between DNA and RNA.-3marks

DNA has T but rna has Uracil
RNA single stranded and DNA double helix
DNA deoxyribose and rna ribose

when are you going to start on chemistry?

Perfect
exactly my answer...
got any bio unit 2 questions?

sure ok

A student suggests that if a person eats high in saturated fats this would increase the risk of heart disease. Suggest why the student thought this and explain how heart disease is caused due to high intake of saturated fats (5 marks)

we have not learnt this yet...can you give a simple summary please

The student thought this because the person gets tired , fatigue and dizziness.

heart disease is caused due to hardening of arteries , build up of fats which forms athermona and are deposited in the wall of the artery and under endothelium.,

thankyou

your welcome mate my turn can u give me more on suggest questions and then we do chem

we can start at 9.

Give me 6 reasons for conserving biodiversity 6 marks

sure so do u mean revise chem at 9pm?
- maintain biodiversity
- beautiful creatures
- tourism
- potential for making new medicines
- education to teach people
- for selective breeding to produce high yield of food

great.
we can start now