Can you identify how chemicals cycle in an ecosystem? to review the chemical inputs and outputs of cellular respiration and photosynthesis, watch these bioflix animations:
a) cellular respiration
b) photosynthesis.

Answer:

Chemicals are cycled in an ecosystem through “biogeochemical cycle”. The chemical inputs and outputs of cellular respiration occur in both plant and animals.

It starts with breakdown of glucose molecule in the presence of oxygen and water and CO2 is released to the environment. Whereas, plants during photosynthesis, take up the light energy, water and CO2 from the environment and synthesize glucose from it.

Explanation:

The light energy that is captured during the light reaction by the chlorophyll pigment inside the chloroplast to split the water molecule into hydrogen and reduction of NADPH cofactor and oxygen is released to the environment. During the Calvin cycle, the CO2 molecules combine with RuBP and utilize energy from ATP and NADPH to combines the hydrogen and CO2 molecules into a 6-carbon sugar molecule called glucose. This glucose molecule can be stored as starch in plants or sent to a cell for glycolysis followed by the citric acid cycle inside the mitochondria to generate CO2 and H2O which is released to environment.  

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