BeePee is absolutely right. In a coordinated turn, the wing turns the airplane. Of course it is possible to yaw an airplane around keeping the wings level and pushing the back end around with the rudder. This is akin to knife-edge flight where the fuselage is yawed nose upward and a combination of fuselage lift and power is used to keep the airplane in the air. However that maneuver is not confused with normal flight where the wings are the source of lift.

The wings can be banked by several means. Ailerons are by far the most common means and a combination of rudder and dihedral is the second most popular method for models. Spoilers and wing warping have been used in some full-scale airplanes, to bank and unbank the wing. Whatever means is used, the purpose is to bank the wing to turn and level the wing to stop the turn.

To turn, nothing else is required. However when the wing is banked to turn the airplane, the lift being produced by the wing is now tilted toward the side and the force available to support the weight is reduced, and the airplane will begin to descend. To make a level (or climbing) turn, the total lift force must be increased. This is usually done by adding elevator control to increase angle of attack, or increasing power (or a combination of both).

When ailerons are used to bank and unbank the wing, the airplane tends to yaw opposite the direction of bank. For this reason, to bank the wings with a pure rolling motion it is usually necessary to apply a little rudder control in the direction of the turn at the same time as ailerons are moved in order to counteract this “adverse yaw”. When the ailerons are no longer deflected, the rudder is moved to neutral also. When the turn is complete, the wing is rolled back level with simultaneous aileron and rudder control.