Multiple Choice
Which process in photosynthesis directly contributes to the carbon cycle by converting atmospheric \(\mathrm{CO_2}\) into organic molecules?
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9. Photosynthesis
Introduction to Photosynthesis
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Which of the following is a major element found in the chlorophyll molecule?
A
Magnesium (Mg)
B
Sodium (Na)
C
Iron (Fe)
D
Calcium (Ca)
Verified step by step guidance1
Understand the structure of chlorophyll: Chlorophyll is a pigment found in plants, algae, and cyanobacteria that plays a crucial role in photosynthesis. It contains a porphyrin ring structure with a central metal ion.
Recall the role of the central metal ion: The central metal ion in the porphyrin ring of chlorophyll is essential for its ability to capture light energy and facilitate the photosynthetic process.
Identify the specific metal ion: Magnesium (Mg) is the central metal ion in the chlorophyll molecule. It stabilizes the structure and is critical for the molecule's function in photosynthesis.
Eliminate incorrect options: Sodium (Na), Iron (Fe), and Calcium (Ca) are not part of the chlorophyll molecule. While iron is involved in other photosynthetic processes (e.g., electron transport), it is not part of chlorophyll.
Conclude that the correct answer is Magnesium (Mg), as it is the major element found in the chlorophyll molecule.
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