The diagram shows the molecular structure of adenosine triphosphate (ATP)

Which of these events occurs during the normal function of ATP in the cell?

A. A chemical bond forms between the adenine unit and the third phosphate group.
B. The chemical bond breaks between the adenine and ribose units.
C. The chemical bond breaks between the ribose unit and the first phosphate group.
D. The chemical bond breaks between the second and third phosphate groups.

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms

What is the next step in muscle contraction after the actin changes shape