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Biology Chapter 8 : Topic 3
Importance of Nitrogen and Magnesium
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Nitrogen is essential for plants because it is required for:
Reasoning: Nitrogen is a major component of amino acids, which form proteins.
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A plant lacking nitrogen will most directly have difficulty in:
Reasoning: Proteins are synthesized from amino acids containing nitrogen.
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Magnesium is important because it is a key component of:
Reasoning: Magnesium forms the central part of the chlorophyll molecule.
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A deficiency of magnesium is most likely to reduce:
Reasoning: Magnesium is directly involved in chlorophyll production.
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Which nutrient is directly linked with protein synthesis in plants?
Reasoning: Nitrogen is required for amino acids and proteins.
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Which nutrient is directly involved in making leaves green?
Reasoning: Magnesium is necessary for chlorophyll formation.
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A plant shows poor protein production but normal chlorophyll levels. Which nutrient is most likely deficient?
Reasoning: Nitrogen deficiency directly affects protein synthesis.
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Chlorophyll is important because it:
Reasoning: Chlorophyll captures sunlight needed for photosynthesis.
9 / 15
Which pair is correctly matched?
Reasoning: Nitrogen is essential for making proteins.
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If magnesium is absent from the soil, a plant will have difficulty:
Reasoning: Magnesium is a structural component of chlorophyll.
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Which nutrient contributes most directly to amino acid formation?
Reasoning: Amino acids contain nitrogen and are the building blocks of proteins.
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Yellowing of leaves due to reduced chlorophyll production may indicate deficiency of:
Reasoning: Magnesium deficiency reduces chlorophyll formation, causing chlorosis.
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Which process depends directly on the availability of nitrogen?
Reasoning: Nitrogen is essential for the formation of proteins.
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Which nutrient has a direct role in photosynthesis through chlorophyll formation?
Reasoning: Chlorophyll contains magnesium at its center.
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Which statement is correct?
Reasoning: This correctly states the primary roles of nitrogen and magnesium in plants.
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