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Multiple Choice
In eukaryotic RNA processing, what molecules in the spliceosome catalyze the intron removal reactions?
A
Messenger RNA (mRNA)
B
Ribosomal RNA (rRNA)
C
Transfer RNA (tRNA)
D
Small nuclear RNAs (snRNAs)
Verified step by step guidance
1
Understand the role of the spliceosome in eukaryotic RNA processing. The spliceosome is a complex responsible for removing introns from pre-mRNA, resulting in mature mRNA.
Identify the components of the spliceosome. It is composed of small nuclear ribonucleoproteins (snRNPs), which include both proteins and small nuclear RNAs (snRNAs).
Recognize the function of snRNAs within the spliceosome. These snRNAs are crucial for catalyzing the splicing reactions, specifically the removal of introns from pre-mRNA.
Differentiate between the types of RNA involved in cellular processes. Messenger RNA (mRNA) carries genetic information, ribosomal RNA (rRNA) forms the core of ribosome's structure and function, and transfer RNA (tRNA) helps decode mRNA into a protein. None of these directly catalyze intron removal.
Conclude that small nuclear RNAs (snRNAs) are the molecules within the spliceosome that catalyze the intron removal reactions during RNA processing.