Keystone Review Practice
Energy Transformations and Cell Reproduction
Characteristic
Produces food
Produces usable energy (ATP)
Occurs in the chloroplast
Occurs in the mitochondria
Occurs in plants
Occurs in animals
Uses sugar / carbohydrates
Produces sugar / carbohydrates
Uses oxygen (O2)
Produces oxygen (O2)
Uses water (H20)
Produces water (H20)
Uses carbon dioxide (CO2)
Produces carbon dioxide (CO2)
Uses sunlight
Photosynthesis
Cellular Respiration
Directions: An arrow going into a diagram represents a reactant. An arrow leaving a diagram
represents a product. Fill in the diagram below using the words below:
CO2
ATP
Glucose
Water
Oxygen
Sunlight
Photosynthesis
Cellular Respiration
1. Write what each portion of the chemical formula of cellular respiration represents below:
C6H12O6 + 6O2  6CO2 + 6H2O + Energy
___________
_________
__________
_________
__________
2. Write what each portion of the chemical formula of photosynthesis represents below:
6CO2 + 6H2O + Light  C6H12O6 + 6O2
___________
_________
__________
____________
________
Examine the diagram below, and then circle the best answer for questions 3-4
3. What macromolecule did the energy come from to power the formation of ATP in the diagram
above?
a. Proteins b. Nucleic Acids
c. Lipids
d. Carbohydrates
4. The ATP in the diagram above was created in the ___________________.
a. Mitochondria
b. Chloroplast
c. Golgi Apparatus
d. Nucleus
Male or Female?
Normal or Trisomy 21?
Directions: Identify if the following characteristics are related to mitosis, meiosis, or both by
placing a “check” in the correct box(es)
CHARACTERISTICS
MITOSIS
MEIOSIS
A type of cell division
Creates diploid (2N) cells
Creates haploid (1N) cells
Cell divides twice , producing four cells
Cell divides once, producing two cells
Makes gametes (sperm and egg)
Makes somatic (body) cells
Chromosome number stays the same (if you start with 46
chromosomes, you end with 46)
Chromosome number is halved (if you start with 46
chromosomes, you end with 23)
Associated with sexual reproduction
Associated with asexual reproduction
Used for growth and repair
Daughter cells are identical to parent cell
Daughter cells are NOT identical to parent cell
Mistakes can cause cancer
Mistakes can cause Trisomy 21
Calculating Chromosome Number
1.
2.
3.
4.
How many chromosomes are in a human body cell? ___________
How many chromosomes are in a human gamete (sperm or egg)? ___________
In fig trees, the haploid ovum contains 10 chromosomes. How many chromosomes will be in the fertilized zygote?
Cows have 52 chromosomes in each somatic cell. If a cow cell undergoes meiosis, how many chromosomes should be
in each gamete?
5. If a fox receives 40 chromosomes from its father’s sperm, how many chromosomes will be present in the fertilized
fox zygote?
6. Each hyena haploid cell contains 28 chromosomes. How many chromosomes does a hyena’s heart celll contain?
7. A mockingbird egg cell contains 9 chromosomes. How many chromosomes are found in a mockingbird’s wing cell?