Regarding eukaryotic genes, it is correct to state that: a) Distal enhancer-like elements decrease the intensity of gene transcription activation b) Mutations in intronic regions of a gene can alter...

Regarding eukaryotic genes, it is correct to state that:

a) Distal enhancer-like elements decrease the intensity of gene transcription activation

b) Mutations in intronic regions of a gene can alter the levels of its corresponding protein

c) They are regulated only by promoter regions, being activated or repressed by the presence of transcription factors

d) The junctions of exons and introns are recognized by splicing factors, which guarantee the production of the same mRNA regardless of cell type.

e) Activator and repressor proteins bind to the coding region of genes, regulating the intensity of their transcription