Which best compares dna and rna with regard to the process of protein production?
dna transforms from a nucleic acid into a protein, and rna remains a nucleic acid.
rna transforms from a nucleic acid into a protein, and dna remains a nucleic acid.
dna leaves the nucleus during the process and rna remains in the nucleus.
rna leaves the nucleus during the process and dna remains in the nucleu

The correct answer would be "RNA leaves the nucleus during the process and DNA remains in the nucleus".

First step of gene expression or synthesis of a protein is decoding of nucleotide sequence of DNA into the nucleotide sequence of RNA under the process called transcription. It takes place in the nucleus of the cell (eukaryotes).

Then RNA carries this information to the ribosomal site outside the nucleus. Ribosomes serve as the site for the protein synthesis or translation. It takes place in the cytoplasm of the cell with the help of tRNA.

Correct D

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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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