Can you help me with a study guide?

I have an organic chemistry final coming up...help! We were given some example questions and I could really use some help with these questions (from my text)...

What are the building blocks of complex carbohydrates?

Compare the building blocks found in complex carbohydrates with those found in protiens

How are hydrocarbons similar? how are they different?

What are 3 kinds of carbon chains found in hydrocarbons?

Compare the structural formulas of butane and isobutene.

Give an example of a difference between butane and isobutane that is due to their structural formulas.

What is a substituted hydrocarbon?

What kind of substituted hydrocarbons react to form an ester?