Which noncoding RNAs are correctly matched with their function?

Select all that apply:

a. MicroRNAs (miRNAs) bind to complementary sequences in mRNA and block its translation.

b. Piwi-associated RNAs (piRNAs) reestablish appropriate methylation patterns in the genome during gamete formation.

c. Small interfering RNAs (siRNAs) bind to complementary sequences in mRNA and block its translation.

a. MicroRNAs (miRNAs) bind to complementary sequences in mRNA and block its translation.

b. Piwi-associated RNAs (piRNAs) reestablish appropriate methylation patterns in the genome during gamete formation.

Explanation:

MicroRNAs

These are the small non-coding RNA molecule. These RNA consist of about 22 nucleotides. MicroRNAs are found in animals, plants and some viruses,

MiRNAs function

MicroRNAs also represented as miRNA function through base-pairing with complementary sequences of mRNA molecules. Due to this base pairing it functions as RNA silencing and regulation of gene expression.

Piwi-interacting RNA

piRNA expressed in animal cell. piRNA are the small non-coding RNA molecules which form RNA-protein complexes.

Piwi-interacting RNA Function:

Function of these complexes are epigenetic and post-transcriptional silencing of transposons.

Small interfering RNA:

siRNA molecules are the small pieces of double-stranded (ds) RNA. There length is about 21 nucleotides long. siRNA have 3' (3 prime) overhangs

Small interfering RNA Function:

siRNA overhangs are used to "interfere" protein translation. They perform this function by binding and degradation of mRNA at specific sequences