Some convincing evidences are presented with ‘Self Gravitation Bio’1 (nomenclature given by Biophysical Society in 2008) on astrophysical principles for 'self gravity’ and ‘mutual gravity’, as if ‘planet within planet’ situation for macromolecules within biological cell. In living organisms, buoyant force of fluids (liquid or gas and other mechanisms) helps to maintain needed seclusion from stronger extrinsic gravity comparable to own gravity of Moon on seclusion from Earth in universal field of gravitation. Similar to matter became layered according to density with heavier matter near core and lighter matter near crust during earth’s formation, potential energy of self gravity compresses macromolecules like nucleic acid having highest ‘molar mass and density’ in core position. Mechanical load bearing microtubule-dependent centration of centrosome find geometrical center of cell region. Central equilibrium position of floating macromolecules get subsequently destabilized due to opposing force of inertia and with increase in hydrostatic pressure of compressed fluids. Metabolic energy of biomass works outward as kinetic energy against potential energy of self gravity and planetary gravity. Energy producing organelles chloroplast, mitochondria are away from central position in cell to avoid central load. In living body, anabolism (build-up) and catabolism (break-down) through various process including photosynthesis and respiration respectively result in a constant ‘change of masses’ per unit volume that can upshot contraction and relaxation alternately on astrophysical principles. Logarithmic spiral phenomena develop in various living creatures like snail, snake and others have the unique geometrical property of maintaining constant angle between radius from centre and tangent from curvature at any point of the arc. Magnitude of potential energy of self gravity goes on decreasing from core to periphery whereas higher magnitude of outward kinetic energy make radius of curvature lengthened.
1. Bhattacharjee I.R. (2013) Self Gravity: The Major Investigation Gap in Life Science. Lambert Academic Publishing ISBN 978-3-659-42698-8.