  A search for new phenomena in events featuring a high energy jet and large
missing transverse momentum in proton-proton collisions at sqrt(s) = 7 TeV is
presented using a dataset corresponding to an integrated luminosity of 33 pb^-1
recorded with the ATLAS detector at the Large Hadron Collider. The number of
observed events is consistent with the Standard Model prediction and this
result is interpreted in terms of limits on a model of Large Extra Dimensions.
