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A protein that speeds up a reaction; reducing the amount of energy needed to make that action; a biological catalyst.
Appearance and Grain stain characteristics of an organism; studying organism without studying the function of them
The substance that comprises bacterial cell walls, specifically of gram-negative or gram-positive microbes
An entity by which infections are transferred, but the entity of transference does not have the disease and does not need to be living
An organism that replicates by using the host's cell parts, including DNA, ribosomes and proteins
The idea that some organisms were generated from other organisms or their by products
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