Which common compounds are NOT plant hormones

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Detailed Solution

Many compounds found in plants are essential for life but are not hormones. They are typically nutrients, structural components, or energy molecules.

Common distractors include:

Nutrients (Macro & Micro):
- Nitrates (NO₃⁻)
- Phosphates (PO₄³⁻)
- Potassium (K⁺)
- Magnesium (Mg²⁺)
- These are building materials or cofactors for enzymes, not signaling molecules.
Pigments:
- Chlorophyll: The green pigment essential for photosynthesis.
- Carotenoids (like Beta-carotene): Orange/yellow pigments that assist in photosynthesis and protect the plant.
- Anthocyanins: Red/purple/blue pigments.
Carbohydrates (Energy & Structure):
- Glucose: A simple sugar; the direct product of photosynthesis.
- Starch: The plant's primary energy storage (like fat in animals).
- Cellulose: The structural component that makes up plant cell walls (what we call "fiber").
Key Enzymes/Proteins:
- RuBisCO: The enzyme that "fixes" carbon dioxide during photosynthesis.
- ATP (Adenosine Triphosphate): The universal energy "currency" of all cells.