The Practical Write Up

Hello 12B :o)

Hope you are all getting on well with the practical write up, you all carried out the experiment exceptionally well regardless of whether or not it worked! Remember graphs, conclusions and evaluations!! Enjoy!

Friday 17th October

Amino Acids

R- group changes to make all the different amino acids

carboxyl group makes it acidic

amine group is the base and it accpets H+ ions

amphoteric - has both acidic and basic properties

they act as pH buffers, they regulate the pH by changing their charge

isoelectric point - ph at which the charge on amino acids is neutral

R-group determines the properties

1.2nd amino group (positively charged, basic)

2. 2nd carboxyl group (negatively charged, acidic)

3. simple hydrocarbon chain (hydrophobic, non-polar)

4. polar hydrocarbon chain (hydorphylic)

protein is determined by the 3D shape

joined together by peptide bonds - requires an enzyme and energy

ionic bond - between charged R-groups

disulphide bond - only between the sulphyl groups of 2 cysteine amino acids

hydrogen bond

Protein Structure

1.Primary (peptide bonds)

2.Secondary (hydrogen bonds)

3.Tertiary (hydrophylic amino acids, hydrogen/ionic/disulphide bonds)

4.Quaternary

Fibrous protein - long chains, strong

Globular protein - irregular structure

Common Assessment One Test

One way in which I would like you to use this blog is to help you be reflective learners. I would like your comments about your test result and what actions you are going to take to help your progress in the subject.

The class average mark was 18/28 (64%)

Think about the following questions:

1) How much background reading have you done to support your lesson notes?
2) How much revision did you do for the test?
3) Did you find it difficult to recall facts, demonstrate understanding or apply your understanding to a new situation?
4) Have you underestimated the challenge and expectations of A Level?

Sharing your comments and ideas on this blog will help each other! I look forward to your comments.

Welcome to your blog

Hello everybody.

I thought it might be useful and fun to have a class blog.

Here we can keep a diary of what we have learnt and I hope to use it for your learning in the future.

If you have any ideas, hints, help, links then post them here, share them with the class. If you want to have a moan, complain, share your worries about the course then post them here (but try to be constructive)

I'll introduce the blog in a lesson soon.