<prompt> ApoB 48 ApoB 100 is synthesized from them RNA; the difference between them is due to:RNA splicingAllelic exclusionDeamination of cytidine to uridineUpstream repression  <response>: Ans. C. Deamination of cytidine to uridineRef: Harper 31e page 390An example is the apolipoprotein B apoB gene and mRNA.In the liver, the single apo B gene is transcribed into an mRNA that directs the synthesis of apo B100.In the intestine, the same gene directs the synthesis of the primary transcriptA cytidine deaminase converts a CAA codon in them RNA to UAA at a single specific siteRather than encoding glutamine, this codon becomes a termination signal apo B48 is the result. 