Knockout Mice Have Been Genetically Altered to Knock Out Specific

Multiple Choice

Knockout mice have been genetically altered to knock out specific genes. How are these mice most often used in research?

A) to study DNA replication in the defective genes (those that have been altered)
B) to determine the role of proteins coded for by those genes that are knocked out
C) to examine defects in DNA structure in those regions that have been altered
D) to study the effect of radiation on DNA