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Photosynthesis in Cyanobacteria

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Photosynthesis, in general, is accompained by the release of oxygen. Prokaryotes are exception to it as a typical bacterial photosynthesis is anoxygenic (oxygen is not released). However, cyanobacteria is an exception to the bacterial photosynthesis as it is oxygenic.

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Source of oxygen in photosynthesis is photolysis of water. Photolysis is associated with PSII. ...

Solution Summary

Bacterial photosynthesis except cyanobacteria is anoxygenic. Oxygenic photosynthesis is linked to PSII which is absent in a typical bacteria.

See Also This Related BrainMass Solution

Cellular Respiration and Photosynthesis

Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced as a by product during photosynthesis. This reaction stores energy in the chemical bonds of glucose.

Sugar and other carbohydrates are used as fuel sources by cells. During the process of Aerobic Cellular Respiration, glucose is broken down using oxygen. This reaction releases energy which is used to create ATP molecules, the energy carrier molecule of cells. The process also releases Carbon Dioxide as a byproduct.

Part 1: Download and fill out this table to compare and contrast Photosynthesis and Aerobic Cellular Respiration. You will submit the completed table for Part 1.

Click here for a copy of the table.


Aerobic Cellular Respiration

Full balanced equation



Is this reaction endergonic or exergonic? State which one it is.

Energy source used

Cell organelles involved in the reaction

Role of ATP in the reaction

Part 2: After completing the table you will have a basic understanding of these two complementary metabolic processes. Using what you have learned, and additional reference information, answer the following questions.

1. What is the name given to the types of organisms that can use photosynthesis to produce glucose? In addition, provide THREE specific examples.
2. Would cyanide affect bacteria that use anaerobic respiration? To answer this you will need to consider the role of oxygen in aerobic cellular respiration. Explain your answer.
3. If oxygen is lacking, how might cells meet their energy needs through fermentation? Explain and give some examples of cells that can do this.
4. Both photosynthesis and aerobic cellular respiration are examples of complex metabolic pathways, consisting of many linked chemical reactions that require enzymes to function. Briefly, explain two (ONLY TWO) attributes of enzymes in catalyzing chemical reactions and in metabolic pathways.

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