Look at the following images, what are some similarities and differences between the cells?

Name the two different types of cells Prokaryotic Cells Eukaryotic Cells

Unit 3: Cells Objective: To be able to compare and contrast the differences between Prokaryotic and Eukaryotic Cells.

The Cell Theory All living things are composed of cells (unicellular or multicellular). Cells are the basic units of structure and function in living things. New cells are produced from existing cells.

Types of Cells Two kinds of cells depending on whether they have a nucleus Eukaryote Prokaryote

Prokaryotes The ONLY prokaryotes in the world are BACTERIA.

Prokaryotes Genetic material (DNA) is not contained in a nucleus, it is free floating PRO = No Nucleus Usually small and simple

What is the most important thing to remember about Prokaryotes?

Eukaryotes Includes protists, fungi, plants and animals. Eu = You Usually larger and more complex than prokaryotes. May be unicellular like an amoeba or multicellular like a plant or human.

Eukaryotes Contains a NUCLEUS, to hold genetic information Contains dozens of specialized structures called organelles.

What is the most important thing to remember about Eukaryotes?

You have 3 minutes to complete your Venn Diagram on Prokaryotic cells and Eukaryotic cells, then check your answers with your neighbor.

Types of Cells Two kinds of cells depending on whether they have a nucleus Eukaryote Prokaryote Nucleus Cells larger Organelles Some have a cell wall (plants) No nucleus Cells smaller All have a cell wall cells DNA Cell membrane ribosomes

Eukaryotic Cell Structure (a.k.a organelles) Objective : To be able to identify organelles within a Eukaryotic cell and their function.

What is an organelle? An organelle is a membrane bound structure that carries out specific activities for the cell (think of them as little organs with certain jobs to do). All organelles reside (live and float around in) the cytoplasm.

You need to know the following Organelles associated with Animals Cells Cell Membrane Nucleus Cytoplasm Mitochondria Golgi Complex Ribosomes Smooth ER Rough ER Vacuole Lysosome

Every cell is enclosed by a Cell Membrane Function: Regulates what enters and leaves the cell Provides protection and support

Nucleus – The control center Function: Contains almost all of the cells DNA for coding proteins and other molecules DNA is found on chromosomes which contain genetic information.

Nucleus-The control center Structure: Surrounded by a double membrane called a nuclear envelope. It allows materials (RNA, proteins, etc) in and out of the nucleus. Small internal region called a nucleolus where ribosomes are made.

Locate the following and color them in on your diagram and think of 2-3 words to describe the term/organelle. 1. Cytoplasm 2. Cell Membrane 3. Nucleus 4. Nucleolus 5. Nuclear Envelope

Ribosomes (not an organelle, but important) Function: Site of protein assembly (synthesizes proteins) Structure: Small pieces of RNA and protein found throughout the cell, and on the Rough E.R. No membrane present.

Endoplasmic Reticulum Function: Site where lipid parts of cell membrane are made, along with proteins. Transports materials throughout the cell. Sends ribosomes to the Golgi Complex. Structure: Rough ER-has ribosomes on surface to assemble proteins (attached to the nucleus) Smooth ER-NO ribosomes on surface

Locate the following and color them in on your diagram and think of 2-3 words to describe the term/organelle. 1. Ribosomes 2. Rough Endoplasmic Reticulum 3. Smooth Endoplasmic Reticulum

Mitochondria – The Power House Function: Convert chemical energy in food into materials easier for the cell to use. ATP = Energy More active cells contain more mitochondria

Golgi Complex (shipping and receiving) Function: Modify (makes molecules more complex), sort, and package proteins and other materials from the ER and distributes them throughout the cell. Material can also be temporarily stored here. Structure: Stack of closely packed membranes

Lysosomes - the clean up crew Function: Breakdown of lipids, carbohydrates and proteins into small molecules to be used by the rest of the cell Breakdown used up organelles Get rid of all “stuff” in the cell Structure: Small, filled with enzymes

Vacuoles - Storage Function: Stores water, salts, proteins and carbohydrates Mostly associated with plants Structure: Sac-like Plant cells have one large central vacuole Animal cells have many small vacuoles

Locate the following and color them in on your diagram and think of 2-3 words to describe the term/organelle. 1. Mitochondria 2. Golgi Complex 3. Lysosomes 4. Vacuoles

Cytoskeleton ( internal structure) Function: Helps maintain cell shape Helps with movement of the cell (i.e. flagella and cilia) Structure: Two types: microfilaments Microtubules - movement - important in cell division, centrioles, help organize this process.

Other organelles NOT ASSOCIATED with animal cells, but plant cells Cell Wall (structural support for plants) Chloroplasts (photosynthesis) Larger Vacuoles (store water)

Simple or Complex? An efficiency apartment is a one room apartment. This room is where you sleep, eat, shower, and entertain your guests. It all happens in one room. It is a simple way of living in a small space. A mansion is large, complex living space with many separate rooms. There are rooms for cooking, eating, sleeping, bathing, reading, watching TV, entertaining guests, exercising, and storage. The rooms in a mansion are constructed for the specific things you would like to be able to do. You can live in simple efficiency or complexity. Which cell can be compared to the one room efficiency apartment? Which cell can be compared to the mansion?

How many organelles can you name? Can you list their function?