How do ADP and ATP cycles differ

Similarities and differences in these ATP-producing processes

Photosynthesis and cellular respiration have some things in common. Glucose appears in both metabolic processes, redox equivalents are used everywhere and certain compartments are required in order to be able to carry out photosynthesis or cell respiration.

From an energetic point of view, photosynthesis and cell respiration are two opposing processes. While the anabolic metabolism (photosynthesis) builds up biomolecules as long-term energy stores, these are broken down in the catabolic metabolism (cell respiration) to generate energy.

 

Photosynthesis

Cell respiration *

metabolism

anabolic

catabolic

aim

Build more energetic

Storage substances

Energy generation

Compartment

Chloroplasts

Cytoplasm and

Mitochondria

Redox equivalents

NADPH + H+

FAD / H2

NAD + H+

FAD / H2

Glucose

End product

Substrate

Processes

endergon

Causes light energy

Photosynthesis

Dark reaction:

reduction

exergon

Provides glucose

Energy!

Citric acid cycle:

oxidation

ATP extraction

Proton gradient and

ATP synthase

Proton gradient and

ATP synthase

* Cell respiration = glycolysis, oxidative decarboxylation, citric acid cycle, end oxidation, ATP synthesis