Higher Biology 2013

Does anyone know the answer to the question that was like 'name the process by which plants remove salt?'

I'm pretty sure that it wasnt increasing, the levels were going in opposite directions but i may have looked at it wrong

Yeah it was active transport. Loads of people looked at that and went "huh... a PLANT? Sure you don't mean salt water FISH??"
But if you read carefully, it said that the salt concentration was very high in the surrounding soil and moves into the plant by diffusion naturally, but that the plant cannot live with the salt. It must be active transport, right?
T'was my answer anyway

the cyaglucide or whatever it was called was decreasing - if you read the question the break down of that makes more cyanide. so with that cyaglucide decreasing on the graph, cyanide was actually going up.. sneaky

the bit about aerobic resperation confirmed that.

a) Active transport

b) 'mitochondria is the site of aerobic respiration which produces much ATP, ATP is required for active transport'

the bit about aerobic resperation confirmed that.

a) Active transport

b) 'mitochondria is the site of aerobic respiration which produces much ATP, ATP is required for active transport'

Was light intensity a valid thing to say for the yeast variable question? I think yeast grow best in damp and dark conditions

For the isolating mechanism with the mice(?) was the answer "geographical" or "mountains"? For my answer I put "geographical: mountains" because I wasn't sure if it was asking specifically about the mountains or just in general. Do you think my answer will be okay?

You seem to be getting every answer right! so jealous of you just now haha!

see the one about Gibberelic acid. was it 1) Gibberelic acid and made in the embryo. then the second part alerone it catalyses the reaction starch to maltose. then the advantage was that by alerone catalysing the reaction, maltose is made and thats used as a food source or something

yep GA, Embryo.

think i put 'a-amalyse breaks down starch into maltose' then something along the lines of 'the maltose is used as growth material for germination, so a-amalyse is essential to germination in barley grains'

Oh, and what about the multi-choice question asking about what population density was?

The two options that stood out to me were "the number of a single species per unit area" and "the number of all species per unit area".

Bit of a rubbish question because the term "population density" will only ever be used in a specific context that made the answer clear. For instance you would never just say "the population density was 20/square kilometer" without referring to something!

(I put for a single species, though I maintain it totally depends on context).

I wrote that it breaks down starch to maltose, which the seedling uses for germination. Would i have to put for energy?

If i remember from one of the older past papers I'm pretty sure the word growth substance/ growth material had to be in there, you can't just repeat 'used for germination' if you get me

can someone help me out, for the e-coli (jacob-monod) question where is asked what the process or something was to produce the enzyme. What did everyone briefly write? (worth 2 marks)

Ah, that's fine then because I'm pretty sure that the one I put is correct.

I would really appreciate seeing the paper again, I can't tell if I misread the answers of if I am just misremembering them.

I was surprised that was just a 2 mark question - it's featured in essays before for either 4 or 6 marks (can't remember which, probably 4).

I just remembered "ROSE" from a study book I had (regulator, operator, structural, enzyme) and talked about how the repressor molecules cannot bind to the operator because of lactose, the inducer. Thus the operator turns the structural gene on and the structural gene produces Beta-galactosidase.