Textbook Question
Describe the three phases of the Calvin cycle and how the products of the light-capturing reactions participate in this process.
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9. Photosynthesis
Calvin Cycle
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Where does the Calvin Cycle occur in plant cells?
A
In the stroma of the chloroplast
B
In the mitochondria
C
In the thylakoid membrane
D
In the cytoplasm
Verified step by step guidance1
Understand the structure of a chloroplast: Chloroplasts are organelles found in plant cells and are the site of photosynthesis. They have an outer membrane, an inner membrane, and an internal fluid-filled space called the stroma.
Identify the components of the chloroplast: Inside the chloroplast, there are thylakoid membranes, which are stacked into structures called grana. The space surrounding the thylakoids is the stroma.
Learn about the Calvin Cycle: The Calvin Cycle, also known as the light-independent reactions or dark reactions, is a series of biochemical reactions that occur in the stroma of the chloroplast. It uses ATP and NADPH produced in the light-dependent reactions to convert carbon dioxide into glucose.
Differentiate between the locations: The thylakoid membranes are where the light-dependent reactions occur, while the Calvin Cycle takes place in the stroma. The mitochondria are involved in cellular respiration, not photosynthesis.
Conclude the location: Based on the understanding of chloroplast structure and function, the Calvin Cycle occurs in the stroma of the chloroplast, not in the mitochondria, thylakoid membrane, or cytoplasm.
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