1. Cell Structures & Functions
Review Session

2. Topic: Cell Theory Question:
List the 2 of the 3 principles of the cell theory.
Answer:
All organisms are composed of one or more cells
The cell is the basic unit of organization of organisms.
All cells come from pre-existing cells

3. Topic: Cell Types
Question: List 2 characteristics of a Prokaryotic organism.
Answer:
Prokaryotes do not have organelles.
They are single-celled organisms

4. Topic: Cell Structures: Identify the 2 organelles picturedB.
Answers:
Nucleus
Endoplasmic Reticulum

5. Remember: There are 2 types of Endoplasmic Reticulum!!
Rough E. R.
Has ribosomes attached
Protein Synthesis
2. Smooth E. R.
No ribosomes
Lipid Synthesis

6. Topic: Cell Structures:
List the functions of the two organelles below.
Golgi Apparatus: modifies proteins, then sorts them into vesicles to be sent to other parts of the cell
Mitochondria: Provides a usable form of energy for the cell. “battery for the cell”

7. Topic: Cell Structures
Question: Which 2 structures are found in plant cells, but not in animal cells?
Answer: Cell Wall and Chloroplasts

8. Topic: Cellular Transport
The plasma membrane is semi-permeable (or selectively permeable).
Question: What does this statement mean?
Answer: semi-permeable means that the membrane allows some molecules to pass freely through the membrane, while excluding others.
*For the cell, this is determined by size, charge, and concentration gradient*

9. Topic: Cellular Transport
2 part question:
What is osmosis? In what direction do the molecules move?
Answer: Osmosis is the diffusion of water across a semi-permeable membrane. The water molecules move towards higher concentrations of dissolved substances.

10. Topic: Cellular Transport Question: Is the cell on the left hypertonic or hypotonic compared to the cell on the right?
Answer:
The cell on the left is hypotonic because it has fewer salt molecules than the cell on the right.

11. Topic: Cell Transport
Question: What are two major differences between Passive and Active Transport?
Hint: Diffusion and Osmosis are examples of passive transport.
Answer:
Passive Transport: Molecules move with Concentration Gradient, no Energy needed
Active Transport: Molecules move against Concentration Gradient, Energy is needed

12. Good Luck on the Test Tomorrow!!!!