AP Biology help

<p>I need help understanding these concepts.</p>

<p>How are the photosynthesis process and cell respiration related to each other?</p>

<p>Photosynthesis is an endergonic reaction that makes the glucose (or glyceraldehyde 3-phosphate) that cellular respiration uses in an exergonic reaction to make energy (ATP). </p>

<p>That's pretty much the very general connection between the two.</p>

<p>photosynthesis and cellular respartion both have an electorn transport system and they use chemiosmosis to generate some ATP (althought the molecules are slightly different NADH and FADH2 in resparation and NADPH (+h^+) in photosynthesis). </p>

<p>Basically autotrophs are the producers which in the dark cycle (calvin cycle) produce carbohydrates, usually glucose. Cellular resparation usues the glucose, lipids, or protiens to make ATP. Essentially almost all the energy used by living things comes form the sun captured in the light reaction.</p>

<p>Also u could say that the autotrophs and hetrotrophs have a symboytic relationship, autotrophs produce O2 and carbohydrates while consuming CO2 while hetrotrophs consume O2 and carbohydrates and give off CO2,</p>

<p>Simplistically, photosynthesis converts light energy to chemical energy and stores it in the bonds of carbohydrates (usually glucose). Cellular respiration breaks down the glucose to release the energy to do cellular work.</p>

<p>How about including the formulas?</p>

<p>My friend says like the formulas are backwards or something..how does that apply?</p>

<p>This page has a pretty succinct summary: <a href="http://www.wcsscience.com/photosynthesis/page.html%5B/url%5D"&gt;http://www.wcsscience.com/photosynthesis/page.html&lt;/a&gt;&lt;/p>

<p>Photosynthesis
6 CO2 + 12 H2O + light energy ---> 6 O2 + C6 H12 O6 + 6 H2O</p>

<p>Respiration
6O2 + C6 H12 O6 ---> 6H2O + 6 CO2 + energy</p>

<p>Awesome, thanks!</p>