Name: ______________________ Date: 3/25/11 Period: _______ Page #: ________
Cell Transport, Energy, and Division Review Sheet
Review Sheet Due Date: Monday, April 4th
Quiz Date: Thursday, April 7th
Cell Transport: Use your book (Chapter 1, section 4), notes, and labs
1. What is passive transport? What are the two types we discussed?
PT: Movement of particles from an area of high concentration to
an area of low conc. without the use of energy.
Examples: Diffusion and Osmosis
2. Describe diffusion and osmosis. What is the difference between them?
Diffusion: Molecules move from high to low concentration
Osmosis: Diffusion of water molecules through a selectively
permeable membrane.
Osmosis is diffusion, but it is the diffusion of water through a
membrane.
3. What is active transport?
AT: The movement of particles through a membrane using
ENERGY. They move from low to high concentration (up the
gradient)
4. How is active transport different from passive transport? Give 2 reasons.
1. Active transport uses ENERGY, passive does not.
2. Active = Low to High Concentration
Passive = High to Low Concentration
3. Active = Up the concentration gradient
Passive = Down the concentration gradient
5. Complete the table below:
Lab Title
(Subject)
Carrot Lab
Air Freshener
Type of Passive
Transport
Osmosis
Diffusion
How do you know?
The water moved from
a high conc. to a low
conc. (through the
carrot).
The air freshener
moved from high to
low conc., but it did
not pass through a
membrane.
Diffusion
Food Coloring
Iodine & Cornstarch
Osmosis
Gummy Bears
Osmosis
The food coloring
moved from high to
low conc., but not
through a membrane.
The iodine/water
solution passed
through the bag
(membrane) and
changed the color of
the cornstarch.
The water went from a
high conc. in the
beaker to a low conc.
in the gummy bear –
the gummy bear grew!
6. Compare and contrast endocytosis and exocytosis.
Similarities: Both are active transport; both use energy and move
large particles.
Differences:
Endocytosis: Moving materials into the cell
Exocytosis: Taking materials out of the cell
Photosynthesis: Use your book (chapter 2, section 1) and notes
1. What is photosynthesis?
The process by which a cell captures energy from sunlight and uses it
to make food.
2. Rewrite the photosynthesis equation. Label the raw materials and the
products.
Sunlight
Carbon Dioxide
+
Water ⇒ Glucose
Raw Materials
+
Oxygen
Products
3. Why is sunlight written above the arrow and not on either side of the
equation?
Sunlight is neither a raw material or a product, but it is necessary in
order for the reaction to take place.
4. What is chemical energy?
Energy stored in the bonds between atoms.
5. What is glucose?
Glucose is a sugar molecule produced during photosynthesis.
6. In which organelle does photosynthesis take place?
Chloroplasts
7. What is chlorophyll?
A green pigment found in chloroplasts.
8. How does carbon dioxide enter the plant?
Through the stomata: small openings on the underside of a leaf.
Respiration and Fermentation: Use your book (chapter 2, section 2) and notes
1. What is respiration?
The process by which cells break down simple food molecules and
release the energy they contain.
2. Rewrite the respiration equation. Label the raw materials and the products.
Glucose + Oxygen ⇒
Carbon Dioxide
Raw Materials
+ Water + Energy
Products
3. How is fermentation different from respiration?
Fermentation does not require oxygen, but respiration does.
Respiration produces more energy than fermentation.
4. Name and describe the two types of fermentation.
Alcoholic Fermentation: Occurs in yeast. Produces alcohol, carbon
dioxide, and a small amount of energy.
Lactic Acid Fermentation: Occurs in humans and animals when the
muscle cells use up oxygen faster than it can be replaced while
breathing.
5. Respiration is a two-stage process. What happens in each stage and where
does each stage occur?
a. Stage 1: Cytoplasm: Glucose molecules are broken down
into smaller molecules
b. Stage 2: Mitochondria: Small molecules are broken down
even more. Requires oxygen and a great deal of energy is
produced.
Cell Division: We will discuss this in more detail after spring break. You can use your
textbook (Chapter 2, section 3) to help you answer these questions.
1. What is the cell cycle?
The regular sequence of growth and division that cells undergo
2. What are the three stages of the cell cycle?
a. Stage 1: Interphase
b. Stage 2: Mitosis
c. Stage 3: Cytokinesis
3. Briefly describe what happens during interphase.
The cell grows to its mature size, makes a copy of its DNA, and
prepares to divide into two cells.
4. Briefly describe what happens during mitosis.
One copy of the DNA is distributed into each of the two daughter
cells.
5. Briefly describe what happens during cytokinesis.
The cytoplasm divides, distributing the organelles into each of the
two new cells.
6. Why is DNA replication important?
It ensures that each daughter cell will have all of the genetic
information it needs to carry out its activities.