  The present work continues studies of the mathematical model of a metabolic
process of the Krebs cycle. We study the dependence of its cyclicity on the
cell respiration intensity determined by the formation level of carbon dioxide.
We constructed the phase-parametric characteristic of the consumption of a
substrate by a cell depending on the intensity of the metabolic process of
formation of the final product of the oxidation. The scenarios of all possible
oscillatory modes of the system are constructed and studied. The bifurcations
with period doubling and with formation of chaotic modes are found. Their
attractors are constructed. The full spectra of indices and divergencies for
the obtained modes, the values of KS-entropies, horizons of predictability, and
Lyapunov dimensions of strange attractors are calculated. Some conclusions
about the structural-functional connections of the cycle of tricarboxylic acids
and their influence on the stability of the metabolic process in a cell are
presented.
