Lecture notes
Unit 2 - B Biological Molecules
- Institution
- CIE
This is the whole chapter in a pdf. Most students have a hard time studying off the text book using the syllabus. This pdf just combines them both to make your life easier.
[Show more]
Content preview
AS LEVELB I O LO GY
,2 Biological molecules .............................................3
2.1 Testing for biological molecules ....................................3
2.2 Carbohydrates and lipids .............................................6
Ring structures .............................................................6
Monomers, polymers and macromolecules ....................7
Carbohydrates ............................................................7
Lipids ........................................................................12
2.3 Proteins and water .....................................................14
Proteins .....................................................................15
Water .......................................................................24
, 2 BIOLOGICAL
MOLECULES
2 .1 T E S T I N G F O R B I O L O G
MOLECULES
Tests for biological molecules can be used in a variety of contexts, such as
contents of mixtures of molecules and following the activity of digestive enz
LEARNING OUTCOMES
C ANDIDATES SHOULD BE ABLE TO:
A. carry out tests for reducing sugars and non-reducing sugars, the iodine
iodide solution test for starch, the emulsion test for lipids and the biuret
to identify the contents of solutions
1. Testing for the presence of reducing sugars
I. Background information
- The reducing sugars include all monosaccharides, such as glucose, and som
disaccharides, such as maltose; the only common non-reducing sugar is su
- Reducing sugars are so called because they can carry out a type of chemica
known as reduction; in the process they are oxidized. This is made use o
Benedict’s test using Benedict’s reagent; Benedict’s reagent is copper (I
an alkaline solution and has a distinctive blue colour. Reducing sugars red
copper sulphate, containing copper (II) ions, to insoluble brick-red copper
containing copper(I); the copper oxide is seen as a brick-red precipitate.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller nazzalmohamedsalim. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53340 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now