The correct answer is: b. the removal of introns and alternative splicing of exons
Post-transcriptional regulation includes processes of regulation between transcription and translation such as RNA splicing, capping, addition of poly-A tail, RNA editing.
RNA splicing represents the process of RNA processing in which newly synthesized pre-mRNA transcript is converted into a mature mRNA. This process occurs only in eukaryotic organism and includes the removal of introns and joining together the exons. RNA splicing might occur during or immediately after transcription and it is performed by spliceosome (complex of small nuclear ribonucleo proteins).
Alternative splicing is a regulated process in which a single gene can code for multiple proteins because particular exons of a gene may be included within or excluded from the final mRNA.
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It's called major histocompatibility complex protein
Glucose is filtered through the glomerulus into the Bowman's capsule. However, in the proximal convoluted tubule (PCT), glucose molecules, almost 100% of them, are actively reabsorbed back into the blood. ... Proteins, do not filter through the glomerulus under normal cicumstances. They are simply too large to do so
