Final answer:
The presence of alternative splicing does not affect mRNA transcription. It does, however, have implications for mRNA stability, transport to the cytoplasm, protein folding, and protein synthesis rate by producing different isoforms that can participate in various cellular functions.
Step-by-step explanation:
The phenomenon that is not affected by the presence of alternative splicing is e) mRNA transcription. Alternative splicing occurs after the mRNA has been transcribed and involves the removal of introns and the rejoining of exons in various combinations. and the protein synthesis rate by creating different isoforms, which may have various efficiencies or localizations.
Alternative splicing can lead to the creation of different protein isoforms from the same genetic sequence. These isoforms may be expressed at different stages of development or in different tissue types, which gives organisms a complex level of control over gene expression.