12. A chlorine atom becomes a chloride ion when it _____.
gains an electron
loses an electron
gains a neutron
loses a proton
13. The total number of atoms in a molecule of sucrose, C12H22O11, is _____.
11
12
22
45
14. An unsaturated lipid contains _____.
more oxygen than hydrogen
double bonds
ionic bonds
only one fatty acid
15. A plasma membrane is made up of a
_____.
cholesterol layer
enzyme bilayer
lipid bilayer
protein layer
16. Water moves into a cell placed in a _____ solution.
osmotic
hypertonic
hypotonic
isotonic
17. Which of the following explains why a cell's size is limited?
Volume increases faster than surface area.
Surface area increases faster than volume.
Homeostasis is disrupted by a cell that is too large.
both a and c
18. By the end of prophase, each of the following has occurred except _____.
tighter coiling of the chromosomes
breaking down of the nuclear envelope
disappearing of the nucleolus
lining up of chromosomes in the cell
19. Energy from sunlight is trapped by chlorophyll located in the _____.
citric acid cycle
mitochondria
electron transport chain
thylakoid membranes
20. Which of the following equations best represents photosynthesis?
C + O2 + H2O —> CO2 + HOH
6CO2 + 6H2O —> C6H12O6 + 6O2
6C + 6H2O —> C6H12O6
C6H12O6 —> 6CO2 + 6H2O
21. When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs.
crossing over
mutagenesis
hybridization
fertilization
22. The _____ produced by each parent are shown along the sides of a Punnett square.
zygotes
offspring
gametes
hybrids
gains an electron
loses an electron
gains a neutron
loses a proton
13. The total number of atoms in a molecule of sucrose, C12H22O11, is _____.
11
12
22
45
14. An unsaturated lipid contains _____.
more oxygen than hydrogen
double bonds
ionic bonds
only one fatty acid
15. A plasma membrane is made up of a
_____.cholesterol layer
enzyme bilayer
lipid bilayer
protein layer
16. Water moves into a cell placed in a
_____ solution.osmotic
hypertonic
hypotonic
isotonic
17. Which of the following explains why a cell's size is limited?
Volume increases faster than surface area.
Surface area increases faster than volume.
Homeostasis is disrupted by a cell that is too large.
both a and c
18. By the end of prophase, each of the following has occurred except _____.
tighter coiling of the chromosomes
breaking down of the nuclear envelope
disappearing of the nucleolus
lining up of chromosomes in the cell
19. Energy from sunlight is trapped by chlorophyll located in the _____.
citric acid cycle
mitochondria
electron transport chain
thylakoid membranes
20. Which of the following equations best represents photosynthesis?
C + O2 + H2O —> CO2 + HOH
6CO2 + 6H2O —> C6H12O6 + 6O2
6C + 6H2O —> C6H12O6
C6H12O6 —> 6CO2 + 6H2O
21. When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs.
crossing over
mutagenesis
hybridization
fertilization
22. The _____ produced by each parent are shown along the sides of a Punnett square.
zygotes
offspring
gametes
hybrids