IGCSE Biology Paper 2

I didn't say sterilised and I didn't say growth hormones or that the cells divide :'( and I knew it for paper 1 but I forgot

I thought it was quite easy, what were the two insoluble molecules that gave energy tho???

I put the same,,, but I meant the 4 marker at the top of the right page, why we sweat when exercising or something

Still hopefully you should get minimum 3 out of 5

I just put carbohydrates and proteins.. even though I know they can be broken down

The question was asking why the rate of sweating changes when we exercise more I think:
I said our muscle cells respire more often releasing energy from glucose. This releases of a lot of heat energy which can cause the enzymes to denature (malform the active site). So the body secretes sweat from sweat glands. The sweat glands evaporate using heat energy from the body (latent heat) cooling it down.

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I said starch and proteins. They are both large insoluble molecules which have to be digested. I don't think carbohydrates are right (you could get it) because glucose is a carbohydrate and glucose is small and soluble.


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I really hope so do you know how many marks it usually is for A*?

Around 80% is the A* Mark (fluctuates depending on how many people did), So I would say you would need a minimum of atleast 140

Do you think glycogen is right?

What did everyone get for the question on the 1st page that was like how would the non resistant bacteria produce a bacterium that was resistant to the disease? I put a mutation or something, I didn't really know. Also did you get the percentage to be 0.52 for the biomass question? And also the question about deforestation I out leaching and soil erosion do you think that's ok?

What did everyone get for the question on the 1st page that was like how would the non resistant bacteria produce a bacterium that was resistant to the disease? I put a mutation or something, I didn't really know. Also did you get the percentage to be 0.52 for the biomass question? And also the question about deforestation I out leaching and soil erosion do you think that's ok?

What did everyone get for the question on the 1st page that was like how would the non resistant bacteria produce a bacterium that was resistant to the disease? I put a mutation or something, I didn't really know. Also did you get the percentage to be 0.52 for the biomass question? And also the question about deforestation I out leaching and soil erosion do you think that's ok?

i dunno about deforestation as well, i put surface run off and lack of legumes

I said that genetic mutation can produce resistant offspring and genetic variance from plasmids from resistant bacteria. I do the calculation wrong because I am actually f*cked in the head. Also I think I made a mistake on the deforestation question:
- I said that, soil erosion occurs because all the nutrients have been peaches away (completely wrong or do you think I'll get a mark?)
-I further said the soil might be water logged because the trees aren't there to protect from the rain and absorb the water so flooding overs.

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Are you implying that bacteria reproduce sexually?

I also got 0.52