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Wednesday 2/23
Please take out a pencil Colored Pencils Warm Up:
With the person sitting next to you, talk about the steps of the cell cycle. Be able to name the stages of the cells life and steps of mitosis.
Mitosis Cell Structure Review
Instructions
Each group will get 3 vocabulary words.
Each person in the group will chose 1 of the words and draw a picture/pictures representing the word as well as write a definition that is easy to understand.
Pictures must take up the whole box and be colored and labeled if needed.
Eukaryotic Cells• Have a nucleus• Found in multi-cellular
organisms & some unicellular organisms
Prokaryotic Cells
• Do not have a nucleus• Found in bacteria
Cell Membrane• Thin, flexible layer• Separates the cell from its surrounding
environment• Controls movement of materials into and out
of the cell• Helps maintain the cell’s internal
environment
Cytoplasm• Thick, jelly-like
substance contained within the cell membrane
Nucleus• Control center of the
cell• Contains the genetic
material (chromatin) the cell needs to reproduce and function.
• Is surrounded by the nuclear membrane
Nuclear Membrane
• membrane that separates the nucleus from the cytoplasm.
Nucleolus
Found inside the nucleus Helps make RNA If it malfunctions, it can cause many
human diseases
DNA
• The genetic material found in all living cells.
• Contains the information needed for an organism to grow, maintain itself, and reproduce
• Stands for deoxyribonucleic acid
Chromatin Chromosomes are not always visible. They usually sit around uncoiled and
as loose strands called chromatin.
Chromosome
Worm-like / rod-like structures formed from chromatin during cell reproduction.
• They become distinct during the reproductive part of the cell cycle as the cell divides.
• Composed of DNA
Sister Chromatids
Pairs of chromosomes are called Sister Chromatids
Structures called a Centromere hold the sister chromatids together
Centrioles - Organizing Chromosomes Every animal-like cell has two small
organelles called centrioles. They are there to help the cell when it comes time to divide.
They are put to work in both the process of mitosis and the process of meiosis and move to opposite sides of the nucleus during cell division
You will usually find them near the nucleus but they cannot be seen when the cell is not dividing.
Spindle Fibers
Spindle fibers form a protein strand that divides the chromosomes in a cell during cell division.
The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis.
Aster & Centrosome
An aster is a cellular structure shaped like a star, formed around each centrosome during mitosis in an animal cell
Centrosome is where the centrioles are organized