Answer:
Enzymes are made up of amino acids which are linked together by peptide bonds in a linear chain
Electrons, protons, and neutrons are the same because they are what atoms are made of and they are different because protons have a + charge, neutrons has no charge, and electrons have a - charge
I think the answer should be medulla oblongata or foramen magnum.
The major nerves that leave brain should form a thick cord in the brain stem that called medulla oblongata. Medulla oblongata will pass a big hole in the base of the skull that called foramen magnum. Depends on what part the question asked(bone or tissue), it probably between those two options.