  We present results on the nucleon scalar, axial and tensor charges as well as
on the momentum fraction, and the helicity and transversity moments. The pion
momentum fraction is also presented. The computation of these key observables
is carried out using lattice QCD simulations at a physical value of the pion
mass. The evaluation is based on gauge configurations generated with two
degenerate sea quarks of twisted mass fermions with a clover term. We
investigate excited states contributions with the nucleon quantum numbers by
analyzing three sink-source time separations. We find that, for the scalar
charge, excited states contribute significantly and to a less degree to the
nucleon momentum fraction and helicity moment. Our analysis yields a value for
the nucleon axial charge agrees with the experimental value and we predict a
value of 1.027(62) in the $\overline{\text{MS}}$ scheme at 2 GeV for the
isovector nucleon tensor charge directly at the physical point. The pion
momentum fraction is found to be $\langle
x\rangle_{u-d}^{\pi^\pm}=0.214(15)(^{+12}_{-9})$ in the $\overline{\rm MS}$ at
2 GeV.
