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AQA BIOL2~3rd June 2013~AS Biology (Now Closed)

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how many marking points do you think there will be for the 6 marker? because i didn't have time to write about cohesion tension, so I just wrote about apoplast, symplast and root pressure.

I forgot about apoplast and symplast :frown:

I done that exact question as a practice 2 weeks ago and got full marks from my teacher so do you think apoplast and symplast are neccessary?

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Reply 3741

hello96

anyone got the paper or photos of it yet?? or any complete unofficial mark schemes? :smile:

Reply 3742

Secret.

Original post by BingTaoBing

HEY GUYS!

In the question about snakes, it said "snakes are predators that lay eggs," and then it went on to talk about the mating of garter snake. BUT...garter snakes are ovoviviparous, which means they give birth to live young and they do not "lay" eggs. TAKE THAT AQA! A ****ING ERROR!

Anyone going to try and complain :tongue:

Reply 3743

GTSwattsy

Original post by harjshavin

what did people put about why there would be no affect to the adult if fetal haem... was produced??.

I put that because they were still producing adult haemoglobin the production of fetal haemoglobin would have no effect.

Reply 3744

Blobar

Original post by harjshavin

what did people put about why there would be no affect to the adult if fetal haem... was produced??.

I wrote little change between adult and fetal haemoglobin but had no idea really.

Reply 3745

dooobie_

Original post by GTSwattsy

There was a question about the role of helicase wasnt there?

Yeah there was!

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Reply 3746

science-oliver

Guys do people reckon 17% at 4kPa will be in the range of answers? I'm quite scared although its one mark?

(edited 10 years ago)

Reply 3747

dooobie_

Original post by Starlight94

What did everyone put for the haemoglobin questions with the curves?

I bombed out on these questions.. I didnt have a clue!

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Reply 3748

rac1

Original post by amar96

I think you're lying

Reply 3749

purple_panther

Original post by BingTaoBing

oh nice one. well spotted

Reply 3750

GTSwattsy

Some people still confused about the 6 marker.

You did not need to talk about the symplastic or apoplastic pathways.

Reply 3751

StudentTalk

Original post by GTSwattsy

There was a question about the role of helicase wasnt there?

Yep. It breaks down the hydrogen bonds between the DNA strands therefore enables it to unwound and reveal the unpaired bases for free nucleotides (in semiconservative rep.) :smile:

Reply 3752

jamie.wiles

Original post by Blobar

I wrote little change between adult and fetal haemoglobin but had no idea really.

no change cause it has adult haemoglobin as well =)

Reply 3753

The Lawful T.J

Original post by Blobar

I wrote little change between adult and fetal haemoglobin but had no idea really.

I put that there wasn't much difference!:P

Reply 3754

laithmo96

Original post by violetiz

But I'm pretty sure asked how it gets from the epidermis to the xylem, and then up to the leaf

Yeah I recall that too, it was something like root>epidermis>xylem>leafs

Reply 3755

MyNameIsTaken :(

Original post by laithmo96

Why is gas exchange more efficient with the muscles?

I put maintains a steep diffusion gradient, as it said, muscles force air in and out of the insect.

Reply 3756

harjshavin

Original post by jamie.wiles

no change cause it has adult haemoglobin as well =)

yh i put that, was an odd question.!

Reply 3757

StudentTalk

Original post by science-oliver

Guys do people reckon 17% at 4kPa will be in the range of answers? I'm quite scared although its one mark?

The graph wasn't that hard to read but i think they will probably allow 15%-17% as the answer was 16%. If they're generous, the range may be a bit bigger... but i doubt it