BIOL 411 Lecture Notes - Lecture 15: Electrochemical Gradient, Adenine, Autotroph
Document Summary
Review: life violates 2nd law of thermodynamics because life is disorder order, so by. O(cid:374)l(cid:455) (cid:272)a(cid:374) o(cid:272)(cid:272)ur (cid:449)ith a(cid:374) i(cid:374)put of e(cid:374)erg(cid:455) Sun, light energy producers (plants)-photosynthesis, glucose energy consumers (us), glucose to atp decomposers inorganic nutrient pool back to producers: heat is released along the way. How organisms obtain energy: phototroph- make atp from light energy (plants, chemotrophic- make atp from glucose (us) How organisms obtain carbon: autotroph- can convert co2 to glucose (plants, heterotroph- rely on fixed carbon. ^^^^^ those defi(cid:374)itio(cid:374)s are(cid:374)"t o(cid:374) the e(cid:454)a(cid:373) Energy- capacity to do work: kinetic energy: motion, potential energy: available and stored, structure or position. Chemical bonds- electrons: potential energy kinetic energy. You get work and lower potential energy out. Laws of thermodynamics: first law: electron energy conserved, neither created nor destroyed. When electrons go to a lower energy level, the excess energy is conserved and stored potential energy: second law: entropy (disorder) increases.
