IGCSE BIOLOGY DOUBTS HERE !!!!

[Deadly_king]

Thanks heaps man!

Anytime buddy

[WARRIOR]

Hey guys

Can anyone get me proper notes on ' The use of Enzymes in the food industry'?.

Also if possible the functions of all enzymes.

I know this is too much to ask and i should work this out by myself but i need conclusions.

Thanks for your time !!

Kimo

[Vin]

Alright Kimo, I'll fish through my hard-copy notes. I think I have some. Give me some time.

[The Golden Girl =D]

http://www.docbrown.info/page01/ExIndChem/ExIndChema.htm

http://gcse.wikia.com/wiki/Enzyme

http://www.purchon.com/biology/revision.htm

http://www.s-cool.co.uk/gcse/biology/enzymes/enzymes.html

http://www.slideshare.net/Smeggie/gcse-biology-enzymes

http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa/enzymes/

Talk to you later iA

[WARRIOR]

woah gg thanks alot ! i have some reading 2 do !!

and vin tyt but i think gg sorted it out for me already . thanks

[Vin]

and vin tyt but i think gg sorted it out for me already . thanks

I'd already started typing stuff. Thanks a lot GG.

[The Golden Girl =D]

woah gg thanks alot ! i have some reading 2 do !!

and vin tyt but i think gg sorted it out for me already . thanks

Anytime ....Happy to have helped you

I'd already started typing stuff. Thanks a lot GG.

Anytime Sir

[WARRIOR]

Describe the role of the fungus penicillium in the production of the antibiotic penicillin

cheers !

[Deadly_king]

Describe the role of the fungus penicillium in the production of the antibiotic penicillin

cheers !

Penicillin is released by Penicillium fungus when its growth is inhibited by stress. So Penicillium fungus is grown under strictly controlled conditions (of pH, oxygen nitrogen sources and lactose) to induce maximum stress, without killing the fungus, so that penicillin yields are maximised.

If you have time and wanna know more, read this.

[WARRIOR]

yo yo

guys this question is weird , its answer is A

but ..if its 10% sugar , that means it has 90% water and the one in the bag has 80% , so the movement shoudl be the other way round right?

thx

[Amii]

yo yo

guys this question is weird , its answer is A

but ..if its 10% sugar , that means it has 90% water and the one in the bag has 80% , so the movement shoudl be the other way round right?
thx

It's not talking about the diffusion of water(osmosis) - it is about the diffusion of sugar

Since  more sugar diffuses out from the bag into the solution - it shows that the concentration of sugar is higher in the bag than the concentration in the solution (diffusion is the movement of substances from a region of higher concentration to a region of lower concentration)

The concentration of sugar in the solution will be 10% which is less than the concentration of the sugar(20%) in the bag.

Hope you understood - Take care  

[WARRIOR]

cheers thx + rep


another question.. why is it A?

[Amii]

cheers thx + rep


another question.. why is it A?

No problem 

During cold days - the volume of sweat will decrease and the amount of urine will increase.

Less sweating - to prevent heat being lost from the body - as sweating cools down the body when water from the sweat evaporates

Since little sweat is being produced - we tend to produce larger volume of dilute urine.

Hence A - Max volume of urine and least volume of sweat produced

[The Golden Girl =D]

cheers thx + rep


another question.. why is it A?

I kind of forgot Biology But I hope what I say is true :S

Urea is a material that your body produces as a *something that your body has to get rid of just like toxics*
So in sweat there is Urea but since it's a COLD day you won't sweat much cuz you can't lose A LOT of water when your body needs it so NOT much Urea is released/gotten ridden of by your body . Hence for the rest of Urea to get of your body it's goes out as Urine

iA what I said made sense =]

[WARRIOR]

alright cheers thx for ur time

lol thx gg ! i understood it