Provided that there's no diagram, most molecules have particular areas on the molecules, called the "active area" that act as a lock to a particular substrate's molecular structure, providing the key.
An enzyme's active area is only able to be "unlocked" by a certain substrate's "key".
Answer:
liquid- enzymes
protein- fat
carbohydrate- saccharides
nuclei acid- dna or deoxyribonucleic acid
I think the answer is 42kg m/s.
