Lab 3: Chemistry of living things

monosaccharide

simplest form of a carbohydrate or a “simple sugar”

disaccharide

sugars that consist of two monosaccharides linked together

What are the 4 major types of organic compounds?

1.) Carbohydrates

2.) lipids

3.) proteins

4.) nucleic acids

reducing sugar

Benedicts solutions

reagent used to test for reducing sugars

Biuret Solution

reagent used to test for the presence of proteins in foods.

If protein is present, the tested substance will turn_____ when mixed with Biuret reagent

violet

What chemical substance is used to detect the presence of starch?

Iodine

In the reducing sugars test, what are the possible results and what do they mean?

If the results are green then there was little to no presence of reducing sugars.

If Orange, than there was a medium presence of reducing sugars

If Red-Brown, then alot of reducing sugars were present.

In the organic/inorganic compounds test, if the deposit is black than the substance that was left is____

Carbon, and the compound was organic.

In the starch test, If a blue/black color appears then ____ is present. But if a red color is present then that means theres a presence of _____.

Starch; Dextrins

emulsion

mixture of two or more liquids that are insoluble to each other.

emulsifier

a substance that stabilizes an emulsion