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Question

Difficulty: EasyPlant Nutrition and Photosynthesis

Match each essential plant nutrient or chloroplast structural feature on the left with its corresponding biological role or reaction site on the right.

  • MagnesiumForms the central atom of the chlorophyll molecule
  • NitrogenEssential component of proteins, amino acids, and nucleic acids
  • StromaSite of carbon dioxide fixation (light-independent phase)
  • Thylakoid membraneSite of light absorption and photolysis of water (light-dependent phase)

Answer

Magnesium matches with forming the central atom of chlorophyll; Nitrogen matches with being an essential component of proteins and nucleic acids; Stroma matches with the site of carbon dioxide fixation; Thylakoid membrane matches with the site of light absorption and photolysis of water.
Each term is accurately matched with its primary function or location: Magnesium constitutes the central ion of chlorophyll, Nitrogen is required for amino acid and protein synthesis, the stroma hosts carbon dioxide fixation, and thylakoid membranes carry out light absorption and water photolysis.

Step-by-Step Solution

1
Identify the primary structural role of Magnesium in photosynthesis.
Magnesium forms the core metallic atom in chlorophyll pigments.
Magnesium deficiency directly leads to chlorosis due to lack of chlorophyll synthesis.
2
Identify the physiological function of Nitrogen in plant nutrition.
Nitrogen forms the base of amino acids, proteins, and DNA/RNA.
Nitrogen is crucial for general plant growth and cellular structure.
3
Determine the specific chloroplast region where dark reactions occur.
The stroma hosts carbon fixation enzymes.
The light-independent Calvin cycle occurs in the fluid stroma surrounding thylakoids.
4
Determine the chloroplast region where light reactions occur.
Thylakoid membranes host light absorption and photolysis.
Photosystems embedded in the thylakoid membrane capture light and split water molecules.

Key Concept

Plant mineral functions and structural sites of photosynthetic reactions
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Topics

Plant Nutrition and Photosynthesis

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