Phosphagens are a group of molecules that includes creatine phosphate (in vertebrates), and arginine phosphate, lombricine, and phosphoopheline (in invertebrates). These molecules have similar functions in different organisms. The structure of creatine phosphate is H O C (double bond O) C H 2 N (C H 3) C (N H 2) N P O 3 2 minus. The structure of lombricine phosphate is P O 3 2 minus N H C (N H) N H C H 2 C H 2 P O 4 minus C H 2 C H (N H 2) C (double bond O) O H. The structure of arginine phosphate is P O 3 2 minus N H C (N H) N H C H 2 C H 2 C H 2 C H (N H 3 plus) C (double bond O) O H. The structure of phosphoopheline is C H 3 P O 4 minus C H 2 N H C (N H) N H P O 3 2 minus. What functions do these molecules have in common? They can be chemically converted to ATP, which is hydrolyzed to ADP to provide energy. They can accept phosphoryl groups from ATP when ATP is present in excess. They can donate phosphoryl groups to ADP to regenerate ATP. They can take the place of ATP in metabolic reactions when [ATP] is low in the body. They increase the strength and size of muscle tissue.

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Astudent made a graph plotting the progress of a reaction over time. the student forgot to label the y-axis of the graph. a graph is shown with two graph lines. one graph line starts at a higher position on the y axis and slopes downwards towards the right. the other graph line starts at a lower position on the y axis and slopes upwards towards the right. the two graph lines stop short of intersecting each other and continue as separate lines which gradually become straight and parallel to the x axis. a vertical line is shown at a point where the two graph lines finally became parallel to the x axis. this vertical line is labeled equilibrium. the title on the x axis is time and an arrow pointing towards the right is shown above time. the title on the y axis is left blank. what best explains the label that the student should use on the y-axis? amount, because as the amount of product decreases, the amount of reactant increases over time. reaction rate, because forward and backward reaction become equal at equilibrium. amount, because the amounts of reactants and products become constant after equilibrium is reached. reaction rate, as the rate of forward reaction increases and rate of backward reaction decreases over time.

How many distinct monochlorinated products, including stereoisomers, can result when the alkane below is heated in the presence of cl2? 3 4 5 6 7?