Multiple VLAN and one DNS

Hi Guys,

on our Envi we have multiple VLANS and we are using one DNS server.

we are running Windows 2012R2 server, most users are Apple OSX users.

we have the next :

VLAN 10    10.10.10.0/24
VLAN 20 10.10.20.0/24
VLAN 30 10.10.30.0/24

DNS Server 10.10.10.2
Gateway VLAN 10 is 10.10.10.1 / 10.10.20.1 /10.10.30.1

VLANS are created in Cisco server .
my question now.

How can i make when a user is on VLAN20 / VLAN30 can use 10.10.10.2 as it DNS server?
Do i have to create a reverse zoon for each VLAN on the DNS even when the Cisco Firewall is the DHCP server?

Thank you