F215 - Revision thread 13th June 2011

My guess would be something to do with the resulting lower pH being optimal for the enzymes that break down the cell cytoskeleton. Also the protons interfering with hydrogen bonds in the cell.

I've done the same as you!

Doesn't seem "too" bad in fairness. I have a solid idea of what will come up :-)

I predict these essay questions:

- How is Insulin produced..( refering to recombinant DNA etcetc )
- PCR
- MUSCLES
- Brain

I'll get a chinese before my exam

What do you mean by 'how is insulin produced'?

What do you mean by 'how is insulin produced'?

when teh sarcoplasmic reticulum release calcium this binds to the troponin which changes shape moving the tropomyosin away from the to actin binding sites.

this allows a myosin head group to attach to the thin filament and this forms a cross bridge

the head group bends causing the thin filament to be pulled along and overlap the thick filament. adp n pi are released

the cross bridge breaks as new atp attaches to teh myosin head

head groups move back an attach as a result

movement of actin filaments = muscle contraction. the contraction cycle continues if atp is available and calcium level in teh sarcoplasm is high.. atp is only available for 2 secs in the muscle other sources are aerobic respiration which needs 02, anaerobic resp and phosphate creatine

Sorry if it's been asked before but does anyone have the mark scheme for the Jan 2011 paper it'd be a massive help!

send it to me?

send it to me?

Ignore the PM thing, i've done it on here

For anyone else that wants them too, I've *hopefully* covered everything on the spec, although some things may need a bit more detail
Good luck tomorrow!

Thanks! I shall read this in the morning

Ignore the PM thing, i've done it on here

For anyone else that wants them too, I've *hopefully* covered everything on the spec, although some things may need a bit more detail
Good luck tomorrow!