A sample from our writing project: General Biology 1 STEM specialized subject by
Juan Apolinario C. Reyes, Juan Apolinario C. Reyes and Marco Reyes
Oxidative phosphorylation
We have gone far in discussing cellular respiration, but we still have a long way to go. At this point of our discussion, we must bear in mind that the direction of cellular respiration is to harvest the energy stored in the bonds of food molecules and transform it to a form that can be used by cells. That form is ATP. In other words, the direction of our discussion is to show how glucose is broken down and turned to adenosine triphosphate.
The mechanisms which will help us understand how ATP is formed in this stage are those we studied under the topic of materials transport across a cellular membrane. Recall that a gradient serves as a natural pull for the movement of materials across semi-permeable membranes.
But in some instances, even with a gradient, large molecules have to be assisted by specialized membrane-proteins. We call this movement facilitated diffusion. For small molecules, it is easier to cross membranes down the direction of gradient. We call this movement passive diffusion. Both passive and facilitated diffusion plays a role in the formation of ATP during the stage of oxidative phosphorylation. We will give this transport mechanism a special name. We call it chemiosmosis.
Juan Apolinario C. Reyes, Juan Apolinario C. Reyes and Marco Reyes
Oxidative phosphorylation
We have gone far in discussing cellular respiration, but we still have a long way to go. At this point of our discussion, we must bear in mind that the direction of cellular respiration is to harvest the energy stored in the bonds of food molecules and transform it to a form that can be used by cells. That form is ATP. In other words, the direction of our discussion is to show how glucose is broken down and turned to adenosine triphosphate.
The mechanisms which will help us understand how ATP is formed in this stage are those we studied under the topic of materials transport across a cellular membrane. Recall that a gradient serves as a natural pull for the movement of materials across semi-permeable membranes.
But in some instances, even with a gradient, large molecules have to be assisted by specialized membrane-proteins. We call this movement facilitated diffusion. For small molecules, it is easier to cross membranes down the direction of gradient. We call this movement passive diffusion. Both passive and facilitated diffusion plays a role in the formation of ATP during the stage of oxidative phosphorylation. We will give this transport mechanism a special name. We call it chemiosmosis.