Cell Structures & FunctionsReview Session

Topic: Cell TheoryQuestion:

List the 2 of the 3 principles of the cell theory.

Answer:

1. All organisms are composed of one or more cells

2. The cell is the basic unit of organization of organisms.

3. All cells come from pre-existing cells

Topic: Cell TypesQuestion: List 2 characteristics

of a Prokaryotic organism.

Answer:

Prokaryotes do not have organelles.

They are single-celled organisms

Topic: Cell Structures: Identify the 2 organelles pictured

• A.

• B.

Answers:

A.Nucleus

B.Endoplasmic Reticulum

Remember: There are 2 types of Endoplasmic Reticulum!!

1. Rough E. R.

Has ribosomes attached

Protein Synthesis

2. Smooth E. R.

No ribosomes

Lipid Synthesis

Topic: Cell Structures:

Golgi Apparatus: modifies proteins, then sorts them into vesicles to be sent to other parts of the cell

List the functions of the two organelles below.

Mitochondria: Provides a usable form of energy for the cell. “battery for the cell”

Topic: Cell StructuresQuestion: Which 2 structures are found in plant

cells, but not in animal cells?

Answer: Cell Wall and Chloroplasts

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*

Topic: Cellular Transport2 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.

Topic: Cellular TransportQuestion: 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.

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

I hope you learned something!!