bro ,
do you mean a whole step or two semitones-( interval)...
kasi whole note means -4 beats (duration)..
i can easily bend a half step ..pero a whole step medyo mahirap..
it is easier to bend those notes with open fingering/s... like for example -(C#, C, B, A,etc..)..
example - play A (using 1,2 finger of the LH) then drop your jaw /loosen a little bit..you'll come out with an Ab note..-but that's a half step
..
it is possible to bend a whole step even a larger step in the higher register but need to practice it..
pm me if got questions..