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Origin of Life K. Sathasivan

Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

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Page 1: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Origin of Life

K. Sathasivan

Page 2: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Are we alone?

A. Yes

B. No

Page 3: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

How do you think life originated on earth?

A. Extraterrestrial aliens brought itB. Came with meteors from other

planetsC. Some superhuman powers created

itD. Chemical from primordial soup

combined to make lifeE. None of the above

Page 4: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

History of Life

Page 5: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Stromatolites

Page 6: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Early prokaryotes

Page 7: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Cyanobacteria fossils

Page 8: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Possible Sources of Life’s Origin

Page 9: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Possible Steps in the Origin of Life

Protobionts and Liposomes

Page 10: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

DNA RNA PROTEIN(Genetic (Information (Catalytic and Information) and catalytic) Structural)

A. DNA

B. RNA

C. Protein

D. Carbohydrates

E. Lipids

Which came first?

Page 11: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Abiotic RNA Replication

Page 12: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Primitive RNA and Proteins

Page 13: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

Which of the following is/are testable hypothesis about origin of life on earth?

A. Extraterrestrial aliens brought itB. Came with meteors from other

planetsC. Some superhuman powers created

itD. Chemical from primordial soup

combined to make lifeE. None of the above

Page 14: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

The Five Kingdom System

Page 15: Origin of Life K. Sathasivan. Are we alone? A.Yes B.No

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