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LEQ: How do enzymes help cells perform chemical reactions?

Explore the role of enzymes in cell functions and grasp the fundamentals of the cell theory, including principles and characteristics. Learn how cells categorize based on structures and the differences between prokaryotic and eukaryotic cells.

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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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