Which of the following does not apply to an enzyme: 1. catalyst 2. inorganic 3. protein 4. all of the above apply to an enzyme?

the correct answer is b

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all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101