Indicate true (T) and false (F) statements below regarding mRNA splicing in human cells. Your answer would be a four-letter string composed of letters T and F only, e.g. TFFF.
( ) Introns must be removed in the order in which they occur along the pre-mRNA.
( ) Nucleosomes tend to be positioned over exons (on average, about one nucleosome per exon).
( ) Exon size tends to be much more variable than intron size.
( ) The exon junction complexes mark the sites on the mRNA where splicing has not been successful.

Question

Indicate true (T) and false (F) statements below regarding mRNA splicing in human cells. Your answer would be a four-letter string composed of letters T and F only, e.g. TFFF.
( )	Introns must be removed in the order in which they occur along the pre-mRNA.
( )	Nucleosomes tend to be positioned over exons (on average, about one nucleosome per exon).
( )	Exon size tends to be much more variable than intron size.
( )	The exon junction complexes mark the sites on the mRNA where splicing has not been successful.

Quizplus · Accepted Answer

Exon size tends to be much more uniform than intron size and averages at about 150 nucleotide pairs, close to the length of DNA wrapped by one nucleosome. The bound nucleosome is suggested to act as a "speed bump" to allow the assembly of splicing proteins involved in exon definition.

Indicate True (T) and False (F) Statements Below Regarding MRNA