Of the following enzymes from the Pentose Phosphate Pathway, which one interconverts a single monosaccharide into...

Of the following enzymes from the Pentose Phosphate Pathway, which one interconverts a single monosaccharide into its constitutional isomer?
A. Lactonase
B. Transketolase
C. Hexokinase
D. Phosphopentose Epimerase

Expert Solution

Isomer are the molecules that have the same chemical formula but a different arrangement of atoms.

Hexokinase phosphorylates glucose to glucose 6-phosphate. Since both are different molecules. So they are not isomers. Both have a different chemical formula. So option B is wrong.

Transketolase transfer ketone group from one molecule to other molecules. So option C is also wrong.

Lactonase carried out the hydrolysis of -6-phosphoglucono-δ-lactone to 6-phosphogluconolactonase. Both have a different chemical formula. So option A is also wrong.

Phosphopentose Epimerase convert ribulose 5-phosphate to xylulose 5-phosphate. Both have the same chemical formula and have a different arrangement of atoms. So correct answer is option D- Phosphopentose Epimerase.

Please write to me if you need more help.

gladiator answered 2 years ago

An organism that possesses all the enzymes of the EMP and Pentose Phosphate pathway has remarkable...

An organism that possesses all the enzymes of the EMP and Pentose Phosphate pathway has remarkable metabolic flexibility. Consider, for example, the need that organisms have for erythrose-4-phosphate. Devise a metabolic sequence that will accomplish net synthesis of erythrose-4-phosphate from glucose without the accumulation of any other intermediates. (10 points).

In the pentose phosphate pathway draw out all the structures, with names, enzymes and cofactors, encountered...

In the pentose phosphate pathway draw out all the structures, with names, enzymes and cofactors, encountered in the conversation of glucose-6-phosphate to ribose-5-phosphate

The pentose phosphate pathway ismost tightly integrated with which metabolic pathway in mammals? (a) glycolysis (b)...

The pentose phosphate pathway ismost tightly integrated with which metabolic pathway in mammals? (a) glycolysis (b) TCA cycle (c) tricarboxylate transport pathway (d) fatty acid oxidation (e) fatty acid elongation

Describe how the Pentose Phosphate pathway give organisms an advantage.

What would happen to cellular glucose-6-phosphate if the pentose phosphate pathway is inhibited?

please answer 1-6 :) 1. Choose the CORRECT enzyme–substrate pair from the pentose phosphate pathway. a....

please answer 1-6 :) 1. Choose the CORRECT enzyme–substrate pair from the pentose phosphate pathway. a. transaldolase – xylulose 5-phosphate b. glucose 6-phosphate dehydrogenase – 6-phosphoglucono-δ-lactone c. 6-phosphogluconate dehydrogenase – 6-phosphoglucono-δ-lactone d. transketolase – xylulose 5-phosphate e. lactonase – ribulose 5-phosphate 2. Choose the enzymes that catalyze reactions with concomitant formation of NADPH. a. glucose 6-phosphate dehydrogenase and lactonase b. transketolase and transaldolase c. phosphofructokinase and 6-phosphogluconate dehydrogenase d. glucose 6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase e. phosphopentose epimerase and glucose...

5. Look at the transaldolase mechanism in the Pentose Phosphate Pathway. What role does the Schiff...

5. Look at the transaldolase mechanism in the Pentose Phosphate Pathway. What role does the Schiff base play in this mechanism?

This question is about the pentose phosphate pathway and interconnected metabolic pathways (glycolysis, gluconeogenesis.) a) What...

This question is about the pentose phosphate pathway and interconnected metabolic pathways (glycolysis, gluconeogenesis.) a) What reactions would occur if the cell needed lots of NADPH and only NADPH? b) What reactions would occur if both NADPH and ATP were both needed? c) What reactions would occur if nucleotides were needed for DNA synthesis and that was the primary need?

What are the three phases of PPP and it’s outcomes? Topic is: Pentose phosphate pathway Thank...

What are the three phases of PPP and it’s outcomes? Topic is: Pentose phosphate pathway Thank you!

In addition to generating reducing power (i.e., NADPH) for biosynthesis, the pentose phosphate pathway also provides...

In addition to generating reducing power (i.e., NADPH) for biosynthesis, the pentose phosphate pathway also provides precursors for synthesis of which of the following? (Select all that apply.) Choose one or more:A.fatty acidsB.aromatic amino acidsC.acetic acidD.nucleic acidsE.citric acid

Question