Multiple Choice
Which property of carbon is primarily responsible for the large diversity of shapes of biological molecules?
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4. Biomolecules
Introduction to Biomolecules
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Which of the following is NOT a nutrient required by plants?
A
Nitrogen ($N$)
B
Phosphorus ($P$)
C
Potassium ($K$)
D
Chlorophyll
Verified step by step guidance1
Understand the question: The problem is asking which of the listed options is NOT a nutrient required by plants. Nutrients are substances that plants absorb from their environment to support growth and development.
Review the listed options: Nitrogen ($N$), Phosphorus ($P$), and Potassium ($K$) are all macronutrients essential for plant growth. Chlorophyll, on the other hand, is a pigment found in plants, not a nutrient.
Clarify the role of chlorophyll: Chlorophyll is a green pigment located in the chloroplasts of plant cells. It plays a critical role in photosynthesis by capturing light energy, but it is synthesized by the plant and not absorbed as a nutrient.
Explain the role of the other options: Nitrogen ($N$) is vital for the synthesis of amino acids and proteins, Phosphorus ($P$) is important for energy transfer and nucleic acids, and Potassium ($K$) is crucial for enzyme activation and osmoregulation.
Conclude: Since chlorophyll is not absorbed from the environment as a nutrient but is instead produced by the plant, it is the correct answer to the question.
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