During Splicing, Which Molecular Component of the Spliceosome Catalyzes the Excision

Question

During splicing, which molecular component of the spliceosome catalyzes the excision reaction?
A) protein
B) DNA
C) RNA
D) lipid
E) sugar

Accepted Answer

During splicing, the RNA component of the spliceosome, specifically the small nuclear ribonucleoproteins (snRNPs), catalyzes the excision reaction. The protein components of the spliceosome play a structural and catalytic role, but the RNA component is the one directly involved in catalysis.