Homework Help - Enzymes

[MadGamer]

Right im typing up my project for science (from rough copy) and i seem to have misplaced a sheet on Breaker and Builder enzymes. Does anyone know any sites on where i can obtain info on the mentioned subject?

PS. I have already tried BBC GCSE Bitesize but that didn't help. I have also tried Google.

[MetaWraith]

A possible place to start ?
http://www.worthington-biochem.com/i...roEnzymes.html

[MadGamer]

Originally Posted by MetaWraith

A possible place to start ?
http://www.worthington-biochem.com/i...roEnzymes.html

Nice try but still nothing. Sorry.

[Maggy J]

I've found this.

Here

Hope it helps.

[MetaWraith]

I don't condone using pre-written essays, but you may find some of the info you want in here.
http://www.coursework.info/30/

[Maggy J]

Originally Posted by MetaWraith

I don't condone using pre-written essays, but you may find some of the info you want in here.
http://www.coursework.info/30/

Nice one Metawraithe.

[Plonking]

What exactly is it you need to know about these enzymes?

I did a level biology and did a whole load of stuff about them, but i'm not sure how much would be relevant or useful at GCSE level...?

I don't remember them being called 'builder' & 'breaker' enzymes, when I where a lad

lots of the general theory in Metawraiths first link still applies, though

I share Plonking's curiosity as to what WNA needs to know?

A definition?

- enzymes are proteins which act as catalysts for chemical reactions. all are originally of biological origin, some have recently been produced by the use of genetically modified micro-organisms. They work by lowering the activation energy for the reaction, but are, themselves, unchanged after the process.

-Builder enzymes catalyse constructive reactions, breaker enzymes catalyse destructive reactions.

Examples?

- Breaker enzymes are used to make glucose syrup from starch, the so called 'amylase' enzymes chop up the long starch molecule into smaller pieces.

- Breaker enzymes called 'restriction enzymes' are used in DNA sequencing to chop the DNA strand into smaller pieces, for analysis.

- Builder enzymes are used in the PCR technique, which 'multiplies' DNA from extremely small samples

there is a small animation in this link -

http://www.sciencemuseum.org.uk/exhi.../genes/142.asp

- although it's mainly about DNA, there are other mentions of enzymes in some of the links off the page.

[MadGamer]

Originally Posted by homealone

I don't remember them being called 'builder' & 'breaker' enzymes, when I where a lad

lots of the general theory in Metawraiths first link still applies, though

I share Plonking's curiosity as to what WNA needs to know?

A definition?

- enzymes are proteins which act as catalysts for chemical reactions. all are originally of biological origin, some have recently been produced by the use of genetically modified micro-organisms. They work by lowering the activation energy for the reaction, but are, themselves, unchanged after the process.

-Builder enzymes catalyse constructive reactions, breaker enzymes catalyse destructive reactions.

Examples?

- Breaker enzymes are used to make glucose syrup from starch, the so called 'amylase' enzymes chop up the long starch molecule into smaller pieces.

- Breaker enzymes called 'restriction enzymes' are used in DNA sequencing to chop the DNA strand into smaller pieces, for analysis.

- Builder enzymes are used in the PCR technique, which 'multiplies' DNA from extremely small samples

there is a small animation in this link -

http://www.sciencemuseum.org.uk/exhi.../genes/142.asp

- although it's mainly about DNA, there are other mentions of enzymes in some of the links off the page.

Thank you very much

Originally Posted by WNA

Thank you very much

you're very welcome - now go & read Metawraith's links on effect of pH, temperature & concentration of substrate

[Maggy J]

Right I can't rep homealone so can somone do it for me.Stupid rep system!!

[MetaWraith]

Originally Posted by homealone

lots of the general theory in Metawraiths first link still applies, though

Originally Posted by homealone

you're very welcome - now go & read Metawraith's links on effect of pH, temperature & concentration of substrate

Glad to see somebody did read the first link I posted. Though I must admit when I posted it that it was probably too "high brow" for GCSE.

Hmmmmm I wonder how long it takes before CableForum becomes a top hit in Google and other search engines for "Homework Help".

[MetaWraith]

Originally Posted by Incognitas

Right I can't rep homealone so can somone do it for me.Stupid rep system!!

Done

[Shaun]

I'm always away when chemistry questions come up

[Paul]

Hmmmm anyone want to think up a question to keep Dell happy? I'm sure we can think of a really difficult one if we try