Topic
Molecular biology
3 questions tagged Molecular biology — spanning every one of the seven Ws.
what
What are introns?
Introns are sections of a gene that are transcribed into RNA but removed before a protein is made. The remaining pieces, called exons, are stitched together.
GeneticsMolecular biology
what
What is a mutation in genetics?
A mutation is a change in the DNA sequence. Mutations can be harmless, harmful or sometimes beneficial.
GeneticsMolecular biology
how
How does DNA copy itself before a cell divides?
DNA is copied by enzymes that unzip the double helix and build matching new strands. This happens during the S phase of the cell cycle before division.
GeneticsMolecular Biology