... Carbon, Hydrogen, Nitrogen, Phosphorus, Oxygen, S? Organism Level Tissues > Organs > Organ Systems > Organism Population Level Individual > Population > Community > Ecosystem > Biosphere Sequence of amino acids in each protein determines the shape: Different shapes = different functions Why are proteins important? Proteins are critical to structure and metabolism of all living organisms. Enzymes: Accelerate biochemical ... reactions. Structural: Form biological structures Transport: Carry biochemically important substances. Defense: Protect the body from foreign invaders. Heredity - How...

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