Answer questions 5 through 10 by choosing responses from the following: a. ammonium ions b. bicarbonate c. calcium d. chloride e. hydrogen ions f. magnesium g. phosphate h. potassium i. sodium j. water Two ions produced during catabolism of glutamine.

Video transcript

Welcome back, everyone. Let's look at our question, which of the following is responsible for synthesizing glutamine from ammonium ions and glutamate. A amylase B glutamine synthetase, C glutamic acid and D glutamate. Well, our name here is gonna guide us is going to guide us to our correct answer. We want to know what helps synthesize glutamine. And we have our enzyme in choice B that is glutamine synthetase. So it would help to synthesize glutamine. So we can use the enzyme name to help us correctly identify what has that function. And it does indeed synthesize glutamine from ammonia ions and glutamate. When we look at our other answer, choices, choice. A amylase is the enzyme responsible for breaking down starch molecules. So completely different enzyme unrelated to this. So cross that off and then try c glutamic acid. That's the acid form of glutamate. So that's not an enzyme and it's one of the reactants for the reaction catalyzed by glutamine synthetase, not the enzyme that helps synthesize glutamine itself. So that's why choice C isn't correct. And then Joyce D glutamine is responsible for catalyzing the opposite reaction, which is the breakdown of glutamine into glutamate and ammonium ions releasing that aid group from glutamine and it's part of metabolism, this breakdown of glutamine. But again, it catalyzes the opposite reaction from what we're looking for. So, not a correct answer. So which is responsible for synthesizing glutamine from ammonium ions and glutamate choice B glutamine synthetase. See you in the next video.