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ORIGIN

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Nucleic acids. Assembled from smaller organic compounds. Simple sugars Amino acids ... Yielded amino acids in 2 weeks. Assumption? ORIGIN & EVOLUTION OF LIFE ... – PowerPoint PPT presentation

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Title: ORIGIN


1
ORIGIN EVOLUTION OF LIFEFIRST ATMOSPHERE
  • H2 N2 CO CO2
  • Any Oxygen?

Why important to life? CH 2.3
2
LIFE OCCURS IN WATER
Chemical Structure Attributes
3
ORIGIN EVOLUTION OF LIFESynthesis of Organic
Compounds
  • Organic Compounds?
  • Proteins
  • Complex carbohydrates
  • Lipids
  • Nucleic acids
  • Assembled from smaller organic compounds
  • Simple sugars Amino acids
  • Fatty acids Nucleotides

SEE CHAPTER 2
4
ORIGIN EVOLUTION OF LIFESynthesis of Organic
Compounds
  • Source of energy driving assembly?
  • Evidence?
  • Stanley Miller conducted 1st experimental test of
    prediction. See Figure 15-2, p. 259

POSSIBLE
ACTUAL
5
ORIGIN EVOLUTION OF LIFESynthesis of Organic
Compounds
  • Mixture
  • Water
  • Methane
  • Hydrogen
  • Ammonia
  • Exposed to spark discharge
  • Yielded amino acids in 2 weeks
  • Assumption?

6
ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
  • What is Life? See pp. 8 - 10
  • Store and process information
  • Replicate
  • Store and process energy
  • Compensatory response to environment

7
ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
  • What is Life? See pp. 8 10
  • Nothing lives without DNA
  • Nothing lives without energy

8
LIFE ASSEMBLES ITSELF INTO CHAINS
9
LIFE ORGANIZES WITH INFORMATION
  • How to maintain constant temperature
  • How to replace worn-out parts
  • How to defend against invaders
  • How to get energy out of food

10
ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
  • What is Life? See pp. 8 - 10
  • Store and process information
  • Replicate
  • Store and process energy
  • Compensatory response to environment

11
ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
  • What is Metabolism?
  • Reactions by which cells
  • harness energy and use
  • it to drive their activities
  • Capacity to (1) obtain and convert energy from
    surroundings and (2) use energy to maintain
    itself, grown and make more cells

12
LIFE RUNS ON SUGAR
13
ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
  • Origin of Agents of Metabolism
  • Origin of Self-Replicating Systems
  • Origins of First
  • Plasma
  • Membrances

See 15.1 Textbook
14
ORIGIN EVOLUTION OF LIFEFIRST ATMOSPHERE
  • Any Water?
  • Liquid water and
  • bilayer membranes
  • Membrane and cell
  • At most basic level Cell Life

15
LIFE NEEDS AN INSIDE AND AN OUTSIDE
16
ORIGIN EVOLUTION OF LIFE
  • Origin of Earth 4 billion years ago
  • Life appeared on Earth 3.8 billion years ago
  • Evolution of the diversity of life
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