Question

a characteristic shared by all enzymes, hormones, and antibodies is that their function is determined by the
1 shape of their molecules
2 dna they contain
3 inorganic molecules they contain
4 organelles present in their structure
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Explanation:

1. Enzymes (mostly proteins), hormones (some are proteins, some are steroids but protein - based hormones), and antibodies (proteins) have their function determined by their molecular shape. For enzymes, the active site shape is crucial for substrate binding; for antibodies, the shape of the antigen - binding site is important; for protein - based hormones, the shape determines receptor binding.
2. Option 2: Hormones like steroid hormones do not contain DNA, and enzymes (except ribozymes) and antibodies are not made of DNA, so this is incorrect.
3. Option 3: Enzymes, hormones (especially protein - based ones), and antibodies are organic molecules (proteins or steroids), not inorganic, so this is incorrect.
4. Option 4: Enzymes (if they are protein - based) are not cellular structures with organelles, hormones are signaling molecules (not cellular structures with organelles), and antibodies are proteins produced by cells, not structures with organelles themselves, so this is incorrect.

Answer:

1. shape of their molecules