1. Molecules and Life
Quiz 3C

2. Matter: anything that has mass and takes up space energy: anything that brings about change (can hold matter together or break it apart) The food you eat is matter held together by chemical energy.

3. element:: when something is made up of only one kind of atom (any substance that cannot be broken down into simpler substances) Arranged in a chart called the periodic table of elements.

4. The cell is the smallest unit that can be alive, but there are smaller structures inside the cell. The smallest of these structures are particles called molecules which are made up of smaller units called atoms.

5. atoms: an atom is the smallest unit of an element molecule: a group of atoms held together by the energy of chemical bonds

6. Four categories of molecules that are essential to life
Carbohydrates – made up of CHO
Proteins – made up of amino acids
Nucleic - made up of nucleotides
Lipids (fats)

7. Carbohydrates Made up of CHO Supply energy for cell processes
Some are important parts of cell structures

8. Examples: sugars & starch
Carbohydrates
Examples: sugars & starch
Glucose
6 carbon sugar

9. Found in plant cell walls
Carbohydrates
Examples: sugars & starch
Cellulose
Found in plant cell walls

10. a storage material in plants
Carbohydrates
Examples: sugars & starch
starch
a storage material in plants

11. a storage material in animals & humans
Carbohydrates
Examples: sugars & starch
glycogen
a storage material in animals & humans

12. There are 20 commonly occurring amino acids.
Proteins
made up of amino acids
There are 20 commonly occurring amino acids.

13. Proteins are involved in almost everything that happens in a living cell.

14. Proteins They are building blocks of many structures in organisms.
Your muscles contain large amounts of protein.

15. Proteins are scattered throughout cell membranes.

16. Proteins Enzymes are proteins and they regulate nearly all
chemical reactions in cells.

17. Nucleic Acids made up of nucleotides
Contain all the instructions that living cells need to make proteins and maintain life.

18. Two major types of nucleic acids
DNA
RNA

19. Carries information that directs each cell’s activities
Nucleic Acid: DNA
Carries information that directs each cell’s activities

20. Needed to make enzymes and other proteins
Nucleic Acid: RNA
Needed to make enzymes and other proteins

21. Lipids (fats) do not mix with water
store and release even larger amounts of energy than carbohydrates do
are important to maintain good health
function – energy storage
membranes are made largely of lipids (phospholipids)