alleryStart learning →What are spliceosomes made of?
AProteins together with RNA molecules
BRibosomal subunits and free tRNAs
CHistone proteins and coiled DNA
DMembrane lipids and pore proteins
Answer & Solution
Correct answer: A. Proteins together with RNA molecules
1. Splicing of pre-mRNAs is carried out by spliceosomes.
2. A spliceosome is a complex of proteins together with RNA molecules.
3. The RNA components are small nuclear RNAs, which are themselves made by RNA polymerase III.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.4 RNA Processing in Eukaryotes_
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