Chapter 10 - Introduction to metabolism (L1)
3.8 billion years ago Metabolic classification framework
• Remarkable species and metabolic diversity energy e’ donor examples
• Abundant
• Ubiquity
• Great oxidation event – 2.7 billion years ago
Autotrophs
Heterotrophs
Electron acceptors?
, What is thermodynamics?
• Analyses energy changes in the system
• The science that describes what is possible and what
is impossible during energy conversion processes
- To understand energy transfers
- Describes the “direction” of a (bio)chemical
reaction
Chemical work:
• Involves the synthesis of complex biological molecules
from much simpler precursors; energy is needed to create
and maintain the molecular complexity of a cell
Transport work:
• Requires energy to take up nutrients,
eliminate wastes, and maintain ion balances
– against an electrochemical gradient
Mechanical work:
• Energy is required for cell motility and the
movement of structures within cells, such as
partitioning chromosomes during cell
division
3.8 billion years ago Metabolic classification framework
• Remarkable species and metabolic diversity energy e’ donor examples
• Abundant
• Ubiquity
• Great oxidation event – 2.7 billion years ago
Autotrophs
Heterotrophs
Electron acceptors?
, What is thermodynamics?
• Analyses energy changes in the system
• The science that describes what is possible and what
is impossible during energy conversion processes
- To understand energy transfers
- Describes the “direction” of a (bio)chemical
reaction
Chemical work:
• Involves the synthesis of complex biological molecules
from much simpler precursors; energy is needed to create
and maintain the molecular complexity of a cell
Transport work:
• Requires energy to take up nutrients,
eliminate wastes, and maintain ion balances
– against an electrochemical gradient
Mechanical work:
• Energy is required for cell motility and the
movement of structures within cells, such as
partitioning chromosomes during cell
division
