1. Chapter 2, section 2
Review

2. Four things all organisms need:
Water
Air
Food
A place to live

3. Organisms get their food in different ways.
Some make their own food. They are
Producers

4. Organisms get their food in different ways.
Some eat other organisms for food. They are
Consumers

5. Organisms get their food in different ways.
Some consumers get food by breaking down dead organisms or waste. They are
Decomposers

6. Proteins
Large molecules made up of small molecules called
Amino acids

7. Jobs of proteins
Protect cells
Repair cells
Help cells grow

8. Two special proteins:
The protein that binds to oxygen to deliver and release oxygen throughout the body:
hemoglobin
The protein that starts or speeds up chemical reactions in cells:
enzymes

9. Carbohydrates
Molecules made up of
Sugars

10. Jobs of carbohydrates Give energy Store energy
Release energy when they are broken down.

11. Types of Carbohydrates
Have one sugar molecule. Easy to break down:
Simple carbohydrates
Have hundreds of sugar molecules. Take longer to break down:
Complex carbohydrates

12. Lipids Are compounds that can’t mix with Water Examples:
Butter, margarine, olive oil

13. Jobs of Lipids Store energy: Fats and oils
Form the membranes of cells:
Phospholipids

14. Nucleic Acids Contain the energy to make: Proteins
Large molecules made up of molecules called:
Nucleotides
The nucleic acid that gives direction and information to cells is:
DNA

15. Review
Plants store extra sugar as lipids, starch, proteins, or nucleic acids:
STARCH!

16. Review
Fats and oils are proteins, lipids, carbohydrates, or nucleic acids.
LIPIDS!

17. Review
The protein ________________________ delivers and releases oxygen throughout the body.
HEMOGLOBIN!

18. Review
_____________________________ are made up of one sugar molecule or a few sugar molecules linked together
SIMPLE CARBOHYDRATES!