Photosynthesis

Plants depend on photosynthesis to derive their energy sources. Through evolution, plant cells have acquired chlorophylls to help carry out the photosynthetic reaction.

Photosynthesis is carried out in two steps, first in two light-dependent photosytems and then in a carbon fixation cycle (Calvin Cycle). Through this process, the plant is able to convert sunlight, water, and CO₂ into glucose and ATP. As a byproduct of this process, O₂ is released. The plant's ability to convert water and CO₂ into glucose and O₂ also provides great benefit for animal species that depend on glucose for energy. The photosynthetic reaction can be summarized as follows:

6CO₂ + 12H₂O + sunlight -> C₆H₁₂O₆ + 6H₂O + 6O₂

 Choose from the options below to find out the steps involved in photosynthesis.

	Step 1: Photosystems Photosynthesis depend on light to produce glucose. In the photosystems, ATP is produced that will help to turn CO2into glucose.
	Step 2: Calvin Cycle The Calvin Cycle, a process that occurs without light, is the process that "fixes" the carbon molecules from CO2 into glucose.