1. Answers to the text questions.
Organic Molecules
Answers to the text questions.

2. Introduction
What is the difference between an organic compound and an inorganic compound?
Organic compounds are based on carbon and are found in living things. Exceptions to this are: CO2, and CO.
Inorganic compounds are other molecules.

3. Carbohydrates
Draw a glucose molecule.
6 carbons

4. Carbohydrates
Draw a ribose molecule.
5 carbons

5. Carbohydrates Give three examples of the following: Monosaccharide
Glucose
Fructose
Galactose

6. Carbohydrates Give three examples of the following: Disaccharide
Maltose
Lactose
Sucrose

7. Carbohydrates Give three examples of the following: Polysaccharide
Starch
Cellulose
Glycogen

8. Carbohydrates
In animals, what are the functions of: a. glucose b. lactose c. glycogen
Glucose is used in cellular respiration to create ATP.
Lactose is a milk sugar, which serves to store glucose.
Glycogen serves as a short-term way to store glucose. It is stored in our liver.

9. Carbohydrates
In plants, what are the functions of: a. fructose b. sucrose c. cellulose
Fructose is the sugar found in fruits. Plants use it to form sucrose, which will form starch, plants’ energy storage molecule.
Sucrose is a soluble sugar that is transported in sap, which will be converted to starch.
Cellulose provides structural support in the cell wall.

10. Lipids
Draw the basic structure of a fatty acid.

11. Lipids Give 3 functions of lipids. Energy storage Thermal Insulation
In animals, energy is stored as fat (triglycerides).
In plants, energy is stored as oil
Thermal Insulation
A layer of fat beneath the skin, called the subcutaneous, insulates against heat loss. This is not a triglyceride.
Buoyancy
Lipids are less dense than water, so therefore helps animals float.

12. Lipids
Compare the use of lipids and carbohydrates in energy storage.

13. Proteins Draw the basic structure of an amino acid. An amino group
An R Group
A carboxylic acid

14. Making and Breaking Polymers
Define condensation
A chemical reaction that combines two monomers into a polymer, and in the process creates a water molecule.
Define hydrolysis
A chemical reaction that breaks down polymers, and in the process splits a water molecule.

15. Seeing the difference!