Category
Biochemistry
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Not a fact anymore
Only proteins can act as enzymes or biological catalysts.
What we know now
Proteins are not the only molecules that can act as biological catalysts. Some RNA molecules can also speed up chemical reactions; these catalytic RNAs are called ribozymes.
- Status
- Overturned
- Category
- Biochemistry
- Accepted for
- ≈67 years
- Changed approximately
- 1982–1989
Not a fact anymore
RNA serves only as a temporary messenger carrying instructions from DNA to protein.
What we know now
RNA does much more than carry instructions from DNA to protein. Different RNA molecules can form part of the ribosome, catalyze chemical reactions, regulate genes, process other RNAs, help defend genomes, and in some viruses serve as the genetic material itself.
- Status
- Superseded
- Category
- Biochemistry
- Accepted for
- ≈27 years
- Changed approximately
- 1980s–2000s
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