Search found 12 matches

by Daniel01
Mon Feb 02, 2009 7:52 pm
Forum: Cell Biology
Topic: Hydrolyzing of disaccharides and amino acids
Replies: 1
Views: 2332

Re: Hydrolyzing of disaccharides and amino acids

basically water is added to break the bonds in both molecules. So for Carbs water would break the glycosidic bond and in Proteins water would break the peptide bonds.
by Daniel01
Wed Jan 21, 2009 9:05 pm
Forum: Cell Biology
Topic: What exactly does the term 'Induced Fit' mean?
Replies: 1
Views: 11317

Re: What exactly does the term 'Induced Fit' mean?

It suggests that the enzyme is not rigid and that it actually changes its shape slightly to fit the profile of the substrate. The enzyme will mould its self around the substrate as it does this it puts strain on the substrate molecule. The strain distorts a particular bond and lowers the activation ...
by Daniel01
Sat Jan 10, 2009 6:50 pm
Forum: Cell Biology
Topic: How Are ISA Experiments Marked?
Replies: 1
Views: 3759

what exam board are you?, it will explain on the website. Here a mark scheme for an AQA ISA http://www.aqa.org.uk/qual/gce/pdf/AQA- ... SMS-07.PDF. They are important because they account for 20% of your AS grade and 10% of your A2.
by Daniel01
Tue Jan 06, 2009 9:30 pm
Forum: Cell Biology
Topic: Got a Biology Test back, had a question
Replies: 4
Views: 4080

I had this question on my mock exam paper but it was out of 7 marks. You needed to mention ion channels, facilatated diffusion with concentration gradient, active transport (ATP) against conc gradient, protein pores and what type of substances get let through eg. ions. I also mentioned the type of p...
by Daniel01
Sat Jan 03, 2009 5:41 pm
Forum: Cell Biology
Topic: a possible typo??????????
Replies: 3
Views: 3373

Re: a possible typo??????????

well i dont think the Smooth ER connects the Rough ER to the Golgi apparatus i thought its functions were synthesis of lipids and steroids, metabolism of carbohydrate and attachment of receptors on cell membrane proteins. Have you checked in another book?
by Daniel01
Mon Nov 24, 2008 5:38 pm
Forum: Cell Biology
Topic: Don't understand recombinant chromosomes
Replies: 1
Views: 3340

Because there is some crossing over of DNA when the chromosomes segregate, alleles on the same chromosome can be separated and go to different daughter cells. There is a greater probability of this happening if the alleles are far apart on the chromosome, as it is more likely that a cross-over will ...
by Daniel01
Wed Nov 19, 2008 5:45 pm
Forum: Cell Biology
Topic: Sodium-Potassium pump
Replies: 1
Views: 3245

Sodium-Potassium pump

The role of absorption of glucose involves the sodium-potassium pump being used along with facilitated diffusion and active transport, what does the potassium ion actually do in the process?
by Daniel01
Wed Nov 19, 2008 5:15 pm
Forum: Cell Biology
Topic: Cell Osmosis Question
Replies: 1
Views: 5737

The water potential of the cell would be less negative compared to the fresh water, which would cause the cell to burst. So the solution would be hypotonic. Also i think Protozoa actually lack a rigid cell wall so their cell would burst instead of becoming turgid.