Prefixes often give away RNA function: 'sn' = small nuclear (splicing occurs in the nucleus), 'mi' = micro (small regulators/silencers), 'r' = ribosomal, 't' = transfer (transport).
To solve this matching question, we need to associate each type of RNA with its correct function. Let's analyze the options:
A. snRNA (small nuclear RNA): snRNA is involved in the process of RNA splicing. It forms a part of the spliceosome complex, which removes introns from pre-mRNA.
Function: 1. RNA splicing
B. miRNA (microRNA): miRNAs are involved in gene silencing. They function in RNA interference (RNAi) by binding to complementary sequences on target mRNA molecules, which results in translational repression or target degradation.
Function: 2. Gene silencing
C. rRNA (ribosomal RNA): rRNA is a key structural component of ribosomes, which are the sites of protein synthesis in cells.
Function: 3. Ribosome structure
D. tRNA (transfer RNA): tRNA is responsible for transporting amino acids to the ribosome during protein synthesis.
Function: 4. Amino acid transport
Based on the information above, the correct matches are:
A-1
B-2
C-3
D-4
Therefore, the correct answer is: A-1, B-2, C-3, D-4.