Alu Elements Account for About 10% of the Human Genome

Multiple Choice

Alu elements account for about 10% of the human genome. What does this mean?

A) Alu elements cannot be transcribed into RNA.
B) Alu elements evolved in very ancient times, before mammalian radiation.
C) Alu elements represent the result of transposition.
D) No Alu elements are found within individual genes.
E) Alu elements are cDNA and therefore related to retrotransposons.