Photosynthesis and Carbon Capture

Cellular Respiration and Photosynthesis thus form the two legs of the carbon cycle in which carbon is cycled back and forth between the atmosphere and the biosphere.

Tiny marine plants called phytoplankton use this carbon dioxide for photosynthesis.

In lipid metabolism the oxidation of the fatty acid chains results in the formation of two-carbon atom (acetyl) fragments which then pass through Krebs cycle.


The carbon atom is then transfered through the entire cycle again.

Sometimes phytoplankton die, decompose, and are recycled in the surface waters.

Large quantities of carbon pass between the atmosphere and biosphere on short time-scales: the removal of atmospheric carbon occurs during photosynthesis, following the reaction CO2 + H2O = CH2O + O2, while most carbon leaves the biosphere through respiration, a reversal of the previous reaction in which an amount of energy equivalent to that absorbed during photosynthesis is released as heat. When oxygen is present, aerobic respiration occurs, which releases carbon dioxide into the surrounding air or water. Otherwise, anaerobic respiration occurs and releases methane into the surrounding environment, which eventually makes its way into the atmosphere or hydrosphere.


It takes a carbon atom one to five years to travel the short cycle

This thermostat works over a few hundred thousand years, as part of the slow carbon cycle. This means that for shorter time periods—tens to a hundred thousand years—the temperature of Earth can vary. And, in fact, Earth swings between ice ages and warmer interglacial periods on these time scales. Parts of the carbon cycle may even amplify these short-term temperature changes.

of years for a carbon atom to go through the long cycle.

The carbon cycle is of interest to understanding climate because it includes two of the most important greenhouse gases: carbon dioxide (CO2) and methane (CH4). Most atmospheric carbon is in the form of CO2, while CH4 is present only in trace concentrations. Because CO2 is chemically inert, it is relatively well mixed within the atmosphere away from forest canopies, whereas CH4 is chemically active and is removed quickly from the atmosphere through oxidation to CO2 and water. The overall atmospheric concentration of these greenhouse gases has increased during the past century and contributed to global warming.

Carbon atoms are fixed in the process of Calvin cycle to ..

Students will take on the role of a carbon atom and record which reservoirs in the carbon cycle they visit. They will compare and contrast their trip with those of their classmates to discover information about sources and sinks, and residence times of the different reservoirs. Ocean processes are highlighted to allow the educator to define the biological pump and explain its importance to climate.

What happens to carbon atoms in photosynthesis

There is a continuous two-way flow of carbon between the organic and inorganic forms. Inorganic carbon is in an state which is to organic carbon during .