De or het biologiestudie?

The correct Dutch article is:

de biologiestudie

How to use biologiestudie

the biologiestudiede biologiestudie
this biologiestudiedeze biologiestudie
that biologiestudiedie biologiestudie
our biologiestudieonze biologiestudie
your biologiestudiejouw biologiestudie
every biologiestudieelke biologiestudie
which biologiestudie?welke biologiestudie?
a big biologiestudie / the big biologiestudieeen grote biologiestudie, de grote biologiestudie