These are the items that appeared in the Bioweapon Research Center.
During the Queen Metroid battle, Samus will become trapped in the creature's stomach. Before her energy is fully drained, Samus will enable use of her Power Bombs so that the Queen can be destroyed from within.
Missile Tank 1Edit
From the main area, a ramp leads up to a small room in which this Tank can be easily obtained. However, before leaving Samus will have to fight through fourteen Super Zebesians.
Missile Tank 2Edit
Following Samus' return to the BOTTLE SHIP, the chamber with this Tank becomes accessible through the southern door of the room where MB was killed. On the bottom floor of this next room is a small hexagonal section of floor. Destroying it with Bombs/Missiles will reveal the Tank.
Missile Tank 3Edit
In the same room as the previous Tank, but on the top floor. Samus must find the hidden opening in the central terminal and Kick Climb up into a Morph Ball tunnel, where she will navigate through several walls until she reaches the Tank.