10 Questions
What is the primary purpose of photosynthesis?
To store energy in organic compounds for later use
Which organisms are referred to as photoautotrophs?
Plants, algae, and cyanobacteria
What are the byproducts of oxygenic photosynthesis?
Oxygen and carbon dioxide
Which organisms perform anoxygenic photosynthesis?
Bacteria and archaea
What role does ATP play in photosynthesis?
It powers proton pumps to directly synthesize ATP
What is the initial step in the process of photosynthesis?
Absorption of light energy by chlorophyll
Where are the proteins responsible for photosynthesis, such as chlorophyll, held in plants?
Inside organelles called chloroplasts
Which compounds serve as short-term stores of energy to later drive other reactions in the process of photosynthesis?
Reduced nicotinamide adenine dinucleotide phosphate (NADPH) and adenosine triphosphate (ATP)
What role did cyanobacteria play in the history of Earth's oxygenation?
The excess oxygen they produced directly contributed to the oxygenation of the Earth
What did Jan Ingenhousz discover in 1779 related to photosynthesis?
Plants receive some energy from light
Test your knowledge on the early form of photosynthesis in archaea, which might have preceded that of cyanobacteria. Learn about the process of light absorption by reaction centers and the role of photosynthetic pigments like chlorophyll. Explore the Purple Earth hypothesis and the evolution of photosynthesis on Earth.
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