Bell Ringer Friday 1 Explain how the cell

Bell Ringer – Friday 1) Explain how the cell membrane is like a gatekeeper. 2) Which one of the following items is not made of cells: dog, person, tree, water? How do you know? ?

Straight from the MCT 2 3. Which of these describes two cell structures with similar functions? A. A chloroplast and a vacuole are alike because both store energy. B. A chloroplast and a mitochondrion are alike because both make energy from sugar. C. A cell wall and a cytoskeleton are alike because both provide rigidity and support for the cell. D. A cell wall and a cell membrane are alike because both surround the cell and provide the cell with protection.

4. How do the functions of the nucleus differ from those of the cell membrane? A. The nucleus converts food energy, while the cell membrane stores minerals and wastes. B. The nucleus controls the activities of the cell, while the cell membrane controls what enters and exits the cell. C. The nucleus provides support, while the cell membrane converts carbon dioxide and water into food. D. The nucleus stores food and water, while the cell membrane stores chemicals used by the cell for photosynthesis.

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Prokaryotes vs. Eukaryotes August 24, 2012

By the end of the day. . • Achievers on the ROAD to college will be able to compare prokaryotic and eukaryotic cells. • Achievers on the ROAD to college will be able to answer our question of the day

QUESTION OF THE DAY… • Which of the organelles that we talked about last week (cell wall, cell membrane, cytoplasm, nucleus) would make it harder to kill a cell?

HYPOTHESIS TIME • Which of the organelles that we talked about last week (cell wall, cell membrane, cytoplasm, nucleus) would make it harder to kill a cell? - What organelles help the cell survive? ?

Let’s Review!!! • All living things are made of _______ • ALL types of cells have a __________. • ONLY plant cells have a _________ • The _______ is like the brain of the cell • ________ keeps everything in the cell in place.

Let’s Review!!! • All living things are made of cells • ALL types of cells have a ____________. • ONLY plant cells have a _________ • The _______ is like the brain of the cell • ________ keeps everything in the cell in place.

Let’s Review!!! • All living things are made of cells • ALL types of cells have a cell membrane. • ONLY plant cells have a _________ • The _______ is like the brain of the cell • ________ keeps everything in the cell in place.

Let’s Review!!! • All living things are made of cells • ALL types of cells have a cell membrane. • ONLY plant cells have a cell wall. • The _______ is like the brain of the cell • ________ keeps everything in the cell in place.

Let’s Review!!! • All living things are made of cells • ALL types of cells have a cell membrane. • ONLY plant cells have a cell wall. • The nucleus is like the brain of the cell • ________ keeps everything in the cell in place.

Let’s Review!!! • All living things are made of cells • ALL types of cells have a cell membrane. • ONLY plant cells have a cell wall. • The nucleus is like the brain of the cell • Cytoplasm keeps everything in the cell in place.

There are 2 types of cells EUKARYOTE PROKARYOTE

Huge Size Difference! Prokaryotic Cells are TINY! Eukaryotic Cells are BIGGER!

Two basic cell types: Prokaryotic & Eukayotic Prokaryotic cells • Lack membrane bound (1)organelles –What’s an organelle? –What’s a membrane?

Which type of cell is more complex? Artist’s illustration of a Prokaryote and Eukaryote Cell

Prokaryotic cells • Able to grow and multiply (2)quickly –Because they’re smaller!

Prokaryotic cells • No nucleus – DNA is (3) free in the cytoplasm • Have cell membrane and cytoplasm

- All prokaryotic organisms are (4)UNICELLULAR Examples include: bacteria and cyanobacteria (blue-green algae).

Actual Prokaryotic Cells

Which organelles is the Prokaryote cell missing?

Eukaryotic cells: • May have evolved from Prokaryotic cells • Have a (5)nucleus that holds the (6)DNA in one place

Eukaryotic cells: • Have (7) mitochondria • Also have cell membrane & cytoplasm

Eukaryotic Cells • This includes protists, fungi, plants, and animals, which include (8) humans. Protists Fungi

Eukaryotic Cells

Actual Eukaryotic Cells

BOTTOM LINE: (9)“PRO” MEANS NO, “EU” MEANS NEU. . (Prokaryotes have NO nucleus. . . eukaryotes have a nucleus)

Have you ever used Purell? How does it kill bacteria but not kill our skin cells? !

Thinking Back • Why would a prokaryotic cell NOT want to have a nucleus? • Why would a eukaryotic cell WANT to have a nucleus?

Thinking Back • That extra layer (the nucleus) helps to protect our DNA from things like Purell or antibiotics but also makes replicating take more time

QUESTION OF THE DAY… • Which of the organelles that we talked about last week (cell wall, cell membrane, cytoplasm, nucleus) would make it harder to kill a cell?

Would this be a prokaryotic or eukaryotic cell? ?

ROAD check Humans are a _____ organism. A. Prokaryotic B. Eukaryotic

ROAD check Since I know this is a ______ cell, these are the types of things I can find in this cell:

ROAD check Where would I find the DNA in this cell?

ROAD check Where would I find the DNA in this cell?

This cell would take ______ than a prokaryotic cell to replicate A. Shorter B. Longer

ROAD check Which of these cells do SUPER scientists (like you all!!) think came first? ?

ROAD check Name me ONE thing this type of cell does not have.

ROAD check WITHOUT LOOKING AT YOUR NOTES, what is that awesome rhyme we can use to help us remember our cell types? ?

ROAD check Name me ONE thing this cell has that the other type of cell is missing. .

Independent Practice! -Take out a blank sheet of paper and put the proper heading on it. Your Name Mr. Vo 8/24/11 Independent Practice

INDEPENDENT PRACTICE Create a Venn Diagram comparing and contrasting prokaryotic and eukaryotic cells. THINGS ONLY BOTH CELL PROKARYOTES TYPES HAVE SHARE THINGS ONLY EUKARYOTES HAVE

EXIT TICKET - Friday You are trying to describe th a eukaryotic cell to your 4 grade sister. Write two sentences describing a eukaryotic cell.