The instructions for making protein comes originally from

The instructions for making protein comes originally from GENES.

Explanation:

Genes, present in nuclei of cells, contain information in DNA needed to produce proteins(functional molecules).

This process consists of two major steps: TRANSCRIPTION AND TRANSLATION. Together, transcription and translation are known as gene expression.

In transcription, the messenger RNA(mRNA), carries the information, or message, from the DNA out of the nucleus into the cytoplasm.

Translation occurs in the cytoplasm and here the mRNA interacts with a ribosome which "reads" the sequence of mRNA bases.

A type of RNA called transfer RNA (tRNA) then assembles the protein, one amino acid at a time.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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