2bio3

Question 1

cellular respiration preliminaries
-first photosynthetic organisms
-large Ea
-mitochondria
-products
-phosphorylation and methods
-what it starts and ends with

Answer 1

Earth had no oxygen two billion years ago but Photosynthetic organisms changed the atmosphere. They could fully oxidize glucose which yielded much more energy so they led to evolution of of aerobic cellular respiration. Each gram of glucose has 3750 calories. The catabolism of glucose releases a large amount of energy, so cellular respiration is a series of pathways. aerobic cellular respiration occurs in mitochondria, consequently most of the cells atp is made there. 36 percent of the products of cellular respiration is converted into atp and the rest is thermal energy. Cellular respiration makes this atp by combining adp with inorganic phosphates from phosphorylated substrates via hydrolysis. It’s two methods are substrate level phosphorylation and oxidative phosphorylation. Substrate level phosphorylation is using enzymes to add phosphates. Oxidative phosphorylation is when atp is made indirectly when other molecules are oxidized. Cellular respiration starts with glucose and oxygen. It ends with carbon dioxide.