Dan's Key point Y1

Question 1

Topic: Biological molecules

How to test for reducing sugars?

Answer 1

> Add a small amount of the liquidised form of your sample to a test tube.
Add equal amounts of Benedic reagent.
heat genteelly in a softly boiling water bath.

Question 2

Summery Q: Biological Molecules

Large molecules often contain carbon. Explain why this is?

Answer 2

> readly binds together to form a backbone that can support other molecules.

Question 3

Summery Q:

State the general name for a molecule that is made up of many similar repeating units.

Answer 3

> Polymer

Question 4

Summery Q:

Explain why Benedict’s reagent turns red when heated with a reducing sugar.

Answer 4

> Reducing Sugars donate electrons to the Benedics reagent.

Question 5

Topic: Biological Molecules

what are the three monosucerides that Glucose can bind with, and what do they form?

Answer 5

> Glucose, form maltose
Fructose, forms Sucrose
Galactose, form lactose

Question 6

SQ:

What is the molecular formula of Sucrose?

Answer 6

> C12H22O11 + H2O