FemaleBo55
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#1
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#1
Here we can all help eachother and discuss any problems/questions (relating to biology obviously :P)
I find Unit 2 papers so much for difficult than Unit 1 :/
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Lifeimitatesart
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#2
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#2
Haven't started the unit 2 papers yet :/
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FemaleBo55
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#3
Report Thread starter 7 years ago
#3
(Original post by Lifeimitatesart)
Haven't started the unit 2 papers yet :/
I started them today but i felt like I didnt know the content as I had expected. What I noticed was that unit 2 papers require more application of theories to certain situation
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coolgamer
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#4
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#4
I have a question. Unit 2 how many ester bonds in phospholipid
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coolgamer
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#5
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#5
I am just rewriting notes and recapping and memorising
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Munrot07
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#6
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#6
(Original post by coolgamer)
I have a question. Unit 2 how many ester bonds in phospholipid
3
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coolgamer
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#7
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#7
(Original post by Munrot07)
3
So in a condensation reaction 3 water molecules will be produced
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coolgamer
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#8
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#8
So what is the similarities and difference between triglycerides and phospholipids?
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Munrot07
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#9
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#9
(Original post by coolgamer)
So in a condensation reaction 3 water molecules will be produced
Yep
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Munrot07
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#10
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#10
(Original post by coolgamer)
So what is the similarities and difference between triglycerides and phospholipids?
Similarities - 3 ester bonds, glycerol, 2 fatty acid chains.
Differences - 3rd fatty acid chain on phopspholipid is replaced by a phosphate group, phospholipid is polar a triglyceride is not.
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randoms132
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#11
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#11
Triglycerides have 3 fatty acids and a glycerol molecule

Phospholipids have 2 fatty acids and instead of 3 fatty acids one of them is a phospahte group
A phospholipid is polar meaning it has two different 'poles' ; the hydrophilic head (water loving) and the hydrophobic tail (water hating)
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randoms132
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#12
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#12
Ive been doing quite alot of past papers and ive been getting grades i dont want ( and ive attempted some unit 2 but theyre so hard
anyone got any tips for unit 2

Doing the 'Application' and 'How Science Works' parts in the as aqa bio NT book is worth everything they reallt do help :P
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coolgamer
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#13
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#13
(Original post by Munrot07)
Similarities - 3 ester bonds, glycerol, 2 fatty acid chains.
Differences - 3rd fatty acid chain on phopspholipid is replaced by a phosphate group, phospholipid is polar a triglyceride is not.
Ty
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coolgamer
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#14
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#14
(Original post by randoms132)
Ive been doing quite alot of past papers and ive been getting grades i dont want ( and ive attempted some unit 2 but theyre so hard
anyone got any tips for unit 2

Doing the 'Application' and 'How Science Works' parts in the as aqa bio NT book is worth everything they reallt do help :P
Have you revised everything before u did the paper?
Make sure u know key definitions?
Know the meanings of explain describe state .... You can easily lose marks if u don't read and also look at the no of mArks if it's 2 then they expect 2 points
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coolgamer
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#15
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#15
If coenzymes bind to active site how come shape of active site is not changed?
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coolgamer
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#16
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#16
(Original post by Munrot07)
3
How are you revising ?
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Munrot07
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#17
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#17
(Original post by coolgamer)
How are you revising ?
I'm not :P I'm actually a uni student
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coolgamer
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#18
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#18
(Original post by Munrot07)
I'm not :P I'm actually a uni student
Oh lol.. How did u revise then ?
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Munrot07
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#19
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#19
(Original post by coolgamer)
Oh lol.. How did u revise then ?
Just made extensive notes on everything and did every past question I could find.
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coolgamer
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#20
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#20
(Original post by Munrot07)
Just made extensive notes on everything and did every past question I could find.
Ok I'm doing that
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