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LEQ: How do enzymes help cells perform chemical reactions?

LEQ: How do enzymes help cells perform chemical reactions?. LEQ: What is the cell theory? Reading: 3.1, 3.3 Activator: Cells carousel List one fact about a cell and pass the paper to the next group member. First letter of the name earliest in alphabet A-Z goes first!

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LEQ: How do enzymes help cells perform chemical reactions?

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  1. LEQ: How do enzymes help cells perform chemical reactions? • LEQ: What is the cell theory? • Reading: 3.1, 3.3 • Activator: Cells carousel • List one fact about a cell and pass the paper to the next group member. First letter of the name earliest in alphabet A-Z goes first! • Key terms – cell, eukaryote, prokaryote

  2. UNIT CONCEPT Cells are chemical systems with emergent properties.

  3. The Cell theory has three principles. • 1) All organisms are made of at least one cell. • 2) All existing cells are produced by other living cells. • 3) The cell is the most basic unit of life. • Nothing simpler is considered a living system

  4. cell membrane cytoplasm Bacterium (colored SEM; magnification 8800x) • All cells have a common origin in the history of life. • All cells share certain characteristics. • *most are microscopic. • enclosed by a membrane. • filled with cytoplasm. • DNA • Ribosomes: • Molecular organelle that • makes proteins

  5. nucleus organelles cell membrane • Cells can be categorized based on the presence of certain structures. • Eukaryotic cells have a nucleus: • (Greek): • karuon – “kernel” • eu – “true”

  6. nucleus organelles cell membrane • Cells can be categorized based on the presence of certain structures: • prokaryotic cell types do not have a true nucleus. • pro – “before” • Obsolete term?

  7. Questions: • How do prokaryotic and eukaryotic cells differ?

  8. Answers: • Eukaryotic cells have a nucleus and membrane-bound organelles; prokaryotic cells generally do not.

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