What is the logic behind high levels of arginine positively regulating n-acetylglutamate synthase? high arginine levels indicate that the urea cycle is going too rapidly. high arginine levels indicate that insufficient urea is being produced. high arginine levels indicate that too much carbamoyl-phosphate is present. high arginine levels indicate that insufficient carbamoyl-phosphate is available for the urea cycle.

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm