Question

in which medium would the level of an enzyme of arginine biosynthesis be the lowest?
(a) glucose + salts
(b) lactose +salts
(c) glucose +salts +tryptophan
(d) arginine+salts​

Answer 1

Answer:

in which medium would the level of an enzyme of arginine biosynthesis be the lowest?

(a) glucose + salts

(b) lactose +salts ☑️✔️

(c) glucose +salts +tryptophan

(d) arginine+salts

Answer 2

Answer:

Medium  containing lactose +salts will show the lowest biosynthesis of arginine.

Explanation:

• Lactose + salts will not be able to provide the energy and components required to synthesize arginine.

• The cytosolic enzymes arginino-succinate synthetase and arginino-succinate lyase function in sequence to convert citrulline into arginine during the urea cycle.
• This is an expensive process in terms of energy because each molecule of arginino-succinate that is produced requires the hydrolysis of one adenosine triphosphate (ATP) molecule into an adenosine monophosphate (AMP) molecule, which uses up two ATP equivalents.
• On a systemic level, the intestinal-renal axis plays a major role in the body's production of arginine: the small intestine's epithelial cells produce citrulline, primarily from glutamine and glutamate, which is then transported by blood to the kidney's proximal tubule cells, which remove citrulline from circulation and transform it into arginine, which is then returned to circulation.

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