Questions & Answers about Rândul meu începe acum.
Because Romanian usually uses the definite form of the noun with a possessive adjective in expressions like this.
- rând = a turn
- rândul = the turn
- rândul meu = my turn
Romanian often says possession as the noun + my/your/etc., not just noun + my.
Compare:
- cartea mea = my book
- prietenul meu = my friend
- rândul meu = my turn
So rând meu would sound incomplete or unnatural here.