Which of the following options best depicts the flow of information when a gene directs the synthesis of a cellular component?

a) rna → dna → rna → protein
b) dna → rna → protein
c) protein → rna → dna
d) dna → trna → mrna → protein

B) DNA - RNA - protein

Explanation:

Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product, usually protein.  Gene expression include steps such as  

•transcription – part of DNA is copied into mRNA via an enzyme RNA polymerase

•RNA splicing – formed mRNA during transcription is not mature so it need to be proceed (e.g. excision of introns). Mature mRNA are then exported from nucleus to cytoplasm

•Translation – mRNA serves as information that codes for the synthesis of one or more proteins.

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