What is Life?

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Transcript What is Life?

What is Life?
ASTR 4: Life in the Universe
Discussion Topics
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Three Domains of Life
Basic Cell Structure
Macro-molecules
Properties of Life
Three Domains of Life
Basic Cell Structure
Basic Prokaryotic Cell Structure
Basic Eukaryotic Cell Structure
Macro-molecules
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Proteins
Nucleic Acids
Carbohydrates
Lipids
Proteins
Proteins
Proteins
Proteins
Nucleic Acids
Nucleic Acids
Nucleic Acids
Carbohydrates (C:H:O=1:2:1)
Lipids
Chirality
Properties of Life
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Order
Metabolism (Energy Utilization)
Reproduction (Growth)
Differentiation (Development)
Communication
Movement (Response to the Environment)
Evolution
More Questions…
• How about Viruses,
Viroids & Prions?
• Carbon-based Only?
• Closed System Only?
• What is the minimal
definition of life?
Human
Coronavirus -SARS
Prion – Mad Cow
Disease