  We present results for the nucleon structure functions and form factors
obtained from 2+1 flavor lattice QCD with physical light quark masses
($m_{\pi}=135$ MeV) in a large spatial extent of about 10 fm. Our calculations
are performed with the PACS10 gauge configurations generated by the PACS
Collaboration with the six stout-smeared ${\mathscr{O}}(a)$ improved
Wilson-clover quark action and Iwasaki gauge action at $\beta=1.82$ and $2.00$
corresponding to lattice spacings of $0.085$ fm and $0.064$ fm respectively.
The lower moments of structure functions, $\langle x \rangle_{u-d}$ and
$\langle x \rangle_{\Delta u - \Delta d}$ given by the twist-2 operators being
properly renormalized, are evaluated in the $\overline{\rm MS}$ scheme at the
renormalization scale of 2 GeV only at $\beta=1.82$, since the renormalization
factors at $\beta=2.00$ have not yet determined nonperturbatively in the RI/MOM
scheme. Instead, at two lattice spacings, we evaluate appropriate ratios of
$g_{A}/g_{V}$ and $\langle x \rangle_{u-d}/\langle x \rangle_{\Delta u -\Delta
d}$, which are not renormalized in the continuum limit. These quantities thus
can be directly compared with the experimental data without the
renormalization.
