Photosynthesis and RespirationEnergy Transformation Within Cells

Energy Transactions

ATP and energy storage

ATP provides energy for coupled reactions

Electron carriers (like NAD) provide reducing (bond-making) power (a high energy electron to share in a bond) for coupled reactions

Photosynthesis

An overview of photosynthesis

The H is sharing a high energy electron that will be used to make a bond. The electron was captured and energized in the light reactions.

The electron will be used to glue the carbons together from CO2 to make new carbon chains: sugar.

An Overview of Photosynthesis

ATP and high energy bonds

Leaf organization - large scale

Leaf organization - subcellular

Plant Cell

Chloroplast

Inside a Chloroplast

The Light Reactions

Chlorophyll

Antenna Complexes

Chlorophylls are in membranes

Electromagnetic Spectrum

Absorbtion spectrum of Chlorophyll

The Z-scheme (the light reactions)

Some ATP is made by chemiosmosis

Z-scheme

Chemiosmosis

Some ATP is made by chemiosmosis

The Dark Reactions

Calvin Cycle (the dark reactions)

Summary

Respiration

an overview of metabolism

Photosynthesis and Respiration

Structures requiring lots of energy are mitochondria rich

Respiration

Glycolysis: Glucose activation and energy harvest

Glycolysis

Glycolysis

Fermentation

Lactate Fermentation

Alcohol Fermentation

Krebs Cycle and Chemiosmosis occurs in Mitochondria, cont.

Krebs Cycle

Essential reactions in the matrix

Chemiosmosis

Chemiosmosis in Mitochondria

Oxygen removes spent electrons

Summary of Respiration