20. The electron transport chain (ETC) is one part in oxidative phosphorylation, which is the last step in cellular respiration. Which of the following is true?

a. The movement of electrons down the ETC drives the formation of a proton gradient.
b. The movement of H+ ions across the inner membrane of the mitochondria drives the transfer of electrons down the
ETC
c. The movement of H+ ions through ATP synthase drives the transfer of electrons down the ETC
d. The movement of electrons down the ETC drives the movement of ADP and phosphate through ATP synthase.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

a symbiotic relationship with the mitochondria

hi my name is ashlynn and im 15

these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.