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Is it made of cells? 15. Sand 16. Worms 17. Leaf 18. Water
Flowers Skin Proteins Rocks Milk Bone Lungs Hamburger DNA Calcium Apples Chromosomes Saliva atoms 15. Sand 16. Worms 17. Leaf 18. Water 19. Molecules 20. Sugar 21. Chlorophyll 22. Paramecium 23. Blood 24 Cell membrane 25. Mushrooms
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From Carbon to Coffee Bean
Amazing Cells
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From carbon to coffee bean Smallest-----Largest
Carbon atom Adenine Glucose Phospholipid Antibody Ribosome Influenza virus E. coli Bacterium Mitochondria Baker’s yeast Sperm cell RBC Skin cell Human Egg Paramecium Amoeba Proteus Grain of Salt Coffee Bean
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Levels Of Organization Cells are the basic unit of Structure and Function!
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What is the difference between prokaryotes and eukaryotes?
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Cell Structure and Functions
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Cell Theory There are three parts to the cell theory:
1. All living things are made of one or more cells 2. Cells are the basic units of structure and function in organisms. 3. All Cells arise from pre-existing cells
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Cell Organelles What are organelles?
internal compartments that carry out specific cell functions How are organelles beneficial to a cell? They allow the cell to grow larger and become more specialized
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Nucleus: “control center”; houses DNA; directs activities of the cell
Nucleolus: producing ribosomes Nuclear envelope: “envelope”; encloses the nucleus and its contents Nuclear pore: “door”, pore in nucleus; can allow substances (RNA) to leave
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Mitochondria “Powerhouse” of the cell
Energy production for cells (ATP) Sites of aerobic respiration “mitochondria makes me mighty”
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Smooth endoplasmic reticulum
“Cell Highway” Synthesizes steroids Detoxifies poisons (alcohol) Transports substances Regulates calcium levels for muscle contraction
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“Back Road” Transports proteins
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Ribosomes “Farmer” Make proteins
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Golgi Apparatus “Post Office” membrane-bound structure
organelle modifies molecules and packages them into small membrane bound sacs called vesicles
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Vesicle “Taxi” Membrane-sac that transports materials vesicle website
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Lysosomes “Recycling Center”
digests waste materials and food within the cell breaks down molecules into their base components with strong digestive enzymes
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How do plant cells differ from animal cells?
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Plant Cell Plant cells have different structures Contain: Cell wall
“Great wall of China” Protection & Shape Chloroplast “Green Machine” Site of photosynthesis Vacuole “Garage” Stores water Large in plant cells, small in animal cells
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Cell membrane “Fence” Regulates substances in and out of the cell.
cell membrane website
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Cell wall Protection, Shape
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Cytoplasm “Juice, Gel” Fluid portion of the cell Suspends organelles
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Assist with cell division : helps to move chromosomes
centrioles Assist with cell division : helps to move chromosomes
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Chromatin “library” Stores genetic info.
Material consisting of DNA and proteins only visible during cell division.
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Different levels of DNA condensation. (1) DNA strand
Different levels of DNA condensation. (1) DNA strand. (2) Chromatin strand (DNA with histones). (3) Chromatin during interphase with centromere. (4) Condensed chromatin during prophase. (Two copies of the DNA molecule are now present) (5) Chromosome during metaphase.
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Microtubules “Skeleton” Part of cytoskeleton
Assist in cell division and provide internal support Can combine with other proteins to form complex structures like cilia and flagella
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Cilia “Hairs” Fine, hair-like projections on surfaces of cells
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Flagella “tail” Cellular movement
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Peroxisome “Garbage Disposal” Produces H2O2
Helps destroy unneeded substances.
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