Which of the following best describes the characteristics and function of sirna?
a a short strand of rna that can complement and inactivate a sequence of mrna
b. a short strand of rna that can act as a transcription factor to initiate transcription
c a strand of dna that can bind to and inactivate an mrna sequence
d. a trna that is not able to attach to a ribosome and therefore inhibits the process of translation

A a short strand of RNA that can complement and inactivate a sequence of mRNA

Option A

Explanation:

siRNA stands for small interfering RNA which has a set double-stranded RNA molecule. It is also called as silencing RNA or short interfering RNA. mRNA is a messenger molecule in the siRNA.

siRNA integrates into a protein complex known as RISC that tells the siRNA to target the RNA sequence. Then its double strands unwind into a short strand in that protein complex and remain bound to it.

It then directed by the RISC either to complement ( enhance) the mRNA molecule sequence or to degrade (inactivate) the mRNA molecule sequence.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.