Which chemical elements does a protein contain?

As well as carbon, hydrogen, oxygen and nitrogen, DNA also contains the element       .

Which four main types of molecule in living organisms all contain carbon?

What are the smaller units (monomers) that make up proteins?

Starch, glycogen and cellulose are all made from many      molecules.

Define a triglyceride.

What is formed when two glucose molecules join together?

Define a nucleotide.

All amino acids share the same basic structure but differ in their    group.

True or False? A small change in the order of amino acids produces a different protein.

What are lipids (fats and oils) made from?

What reagent tests for starch, and what is a positive colour change?

What reagent tests for glucose (a reducing sugar), and what is a positive colour change?

What reagent tests for protein, and what is a positive colour change?

Describe the ethanol emulsion test for lipids and its positive result.

A positive iodine test for starch changes colour from orange-brown to       .

The        test for glucose must be heated in a water bath to show a colour change.

True or False? The Benedict's test for glucose gives a positive result at room temperature without heating.

Biuret solution turns from blue to      when protein is present.

When describing a food test in an exam, what two things must you always give?

Define the emulsion test.