Down Syndrome in humans is caused by

This mutation could be caused by tautomeric shifting of the bases

Which enzyme is not required for prokaryotic DNA replication?

CTTC

Which of the following could be a recognition site for a restriction endonuclease?

GATATC

In humans, the risk of trisomy in children is increased by

The nurse at the clinic is seeing a 9 year old boy who complains of his feet itching and sores on his feet and between his toes.  The nurse immediately suspects?

 Proteins can recognize specific sequences of bases in double stranded DNA because

A 12 year old is brought to the Emergency Room from a house fire.  The patient has burns on his hands, arms, chest and face.  The nurses priority nursing action is?