SkyAye

Whooo.... Just got on MSN at last

i could be wrong but form what i remeber form bio a-level its the enzymes that are denatured by heat or high Ph not the substrate. and as yeast is a living organism unlike an enzyme i would assume it can die. I am currently studying A level Biology and have not long finished that unit. I'm now starting my coursework in biology and I'm doing in on Yeast. The title is "To see how temperature effects the rate of respiration in yeast" During my research and what I have studied already, I have found out that as the temperature increases, the rate of respiration decreases meaning that the substrate has denatured and cannot fit into the active site that causes the reaction occur. It is the substrate that denatures not the Enzyme. Because of the speed they travel as the temperature increases, the friction causes the substrate to denature and no longer fit into the active site. The yeast does not die. Because the substrate no longer fits into the active site, it cannot produce Carbon Dioxide but it is still able to move as the temperature increases or decreases accordingly. Hope that Jogs some memories Aye

The yeast does not die, it de-natures. This means that the substrate will not fit into the active site on the enzyme (in this case, yeast). Essentially the substrate fits into the enzyme like a jigsaw. Once it reaches a certain temperature (also known as the optimum temperature), the substrate is moving at such a speed that it starts to change shape. This then means that the substrate will not fit into the enzyme like a jigsaw (de-natures), but it is still moving. Because it can't fit into the enzyme, no chemical reaction can occur meaning that Carbon Dioxide cannot be released, and the rate of respiration will decrease. The Enzyme will continue to move without the release of Carbon Dioxide but it cannot die. Once it has heated up again, the substrate will try and fit into the active site of the enzyme but no chemical reaction will occur as it is essentially the wrong shape. This process will continue every time the yeast is heated up and then left to cool down meaning it will not die. Hope that makes sense Aye

Happy Birthday Natty. Glad you've had a good day. Love Aye xxx

I've been looking around for various different quotes on different cars and I've found that the "Moneysupermarket" is the best place to get an online quote. You don't need to eneter many details and they've come back with some really cheep quotes for someone who's just passing their test. Hope that helps you, Aye:)

Still nothing here in N. Wales. Oh I do hope it snows... Seriously can't be bothered with 6th form tomorrow :( Aye

That’s usually the case though Mav. Great winds, great tides and something crops up either work related or school related. Typical. Ah well. Maybe we’ll get lucky here in sunny Wales and the wind will be bob-on shore, the tides will be afternoon and the sun will be shining No harm in living a fantasy is there See you all soon, :)Aye:)

HAPPY BIRTHDAY SI!! Hope you have a good day and don't forget to share your caterpillar cake Love aye xx

Like it! Very clever.

Hi Guys. Nice to see you all at last. Its been too long Hopefully we can get out a bit more often now. Shame the wind was a little cross shore but at least we got to get the landboard sandy at last See you all soon Aye

wwww. She's going to kill you for that one And yeah; you did manage to embarrasse me ...I'll get you back though:P

you are going to pay for that simon moore... People I am sooooo sorry (Practicly crying with embarrassment)

Oh yes he would.... He's currently picking them out now as we speak... I'm sorry for this guys. I'll never live it down :o (Seriously embarrasing)

I have a funny feeling its going to be me next..... I'm sorry if these pictures scare you.

Brilliant Leto... I thought you might like that one. I think its fair to say you're even now... Untill next time that is. Oh and people... this photo was taken at shell and it really was as funny as it looks:D Aye