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.

the endocrine system secretes hormones into blood and other body fluids. these chemicals are important for metabolism, growth, water and mineral balance, and the response to stress. hormones provide feedback to the brain to affect neural processing. reproductive hormones affect the development of the nervous system.

lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.

1. what is the relationship between the shape of an enzyme and the reactions they catalyze?

2. how does an enzyme inhibitor work?

separate your answers so i dont get confused : )

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.