1. To Do: Title your page “Unit 1 Review” Number down your page 1-23.
AP Bio Unit 1 Review
To Do:
Title your page “Unit 1 Review”
Number down your page 1-23.

2. 1) How many neutrons does the isotope Na - 24 have?
11 Na Sodium 11 23 12 13

3. 2) How many protons and electrons does Na have?
23: 11
12: 11
11: 11
13: 11
11 Na Sodium

4. 3) Nitrogen-12 and Nitrogen-14 are examples of?
ions
neutrons
isotopes
valences
molecules

5. 4) Determine if Sr is a metal or nonmetal and what its ionic charge is knowing its valence electrons.
38 Sr Strontium
Metal: -2
Metal: +2
Metal: -1
Metal: +1

6. 5) DNA is composed of building blocks called _____.
nucleic acids Gs
nucleotides
adenines
amino acids

7. 6) What element is found in all organic compounds?
carbon
oxygen
helium
iron
nitrogen

8. 7) This atom can form up to _____ single covalent bond(s).1 2 3 4

9. 8) Which figure correctly illustrates bonding in H2O?

10. 9) The brackets are indicating a(n) _____ bond.
ionic
polar covalent
single (nonpolar) covalent
hydrophobic
hydrogen

11. 10) Each water molecule is joined to _____ other water molecules by ____ bonds.
two ... hydrogen
four ... hydrogen
three ... ionic
four ... polar covalent
two ... polar covalent

12. 11) Why isn't this insect drowning?
Surface tension.
The insect is very light.
It is difficult to change the temperature of water.
The insect is swimming.
The insect is flying just above the water surface.

13. 12) How does the pH of the solution on the right compare with that of the solution on the left?
The solution on the right is neutral relative to the solution on the left.
Both of these solutions are equally acidic.
The solution on the right is basic relative to the solution on the left.
Both of these solutions are equally basic.
The solution on the right is acidic relative to the solution on the left.

14. 13) Which one of these is an amino group?B D E A C

15. 14) Which one of these is a hydroxyl group?B D E A F

16. 15) Which one of these is a phosphate group?B D E A C

17. 16) Which one of these behaves as an acid?

18. 17) Glycogen is _____. the form in which plants store sugars
a polysaccharide found in animals
a polysaccharide found in plant cell walls
a transport protein that carries oxygen
a source of saturated fat

19. 19) This figure is an example of a(n) _____.
nucleic acid
protein
saturated fat
unsaturated fat
steroid

20. 20) What type of bond joins the monomers in a protein's primary structure?
ionic
hydrophobic
peptide
S—S
hydrogen

21. 21) Which of these illustrates the secondary structure of a protein?

22. 22) Enzymes work by _____. adding a phosphate group to a reactant
decreasing the potential energy difference between reactant and product
adding energy to a reaction
increasing the potential energy difference between reactant and product
reducing EA

23. 23) As a result of its involvement in a reaction, an enzyme _____.
loses a phosphate group
permanently alters its shape
loses energy
is unchanged
is used up