James Watson and "junk" DNA. That's about all I could find.
There is no English word that starts with you and ends with J.
A four letter word starting with J is jump or joke.
A word that starts with TA and includes a J is Taj Mahal.
Jeepers
joust
· joyful · just
JunkJambJustJoinJail
jump
joule
java
Possibly 'jurisdiction.'
junta, jelly, joust