Which type of enzyme is not a part of the oxidative phase of the Pentose Phosphate Pathway (PPP)?Group of answer choicesA. IsomeraseB. DehydrogenaseC. LactonaseD. KinaseE. All of the above take part in the oxidative phase of the PPP.
Question
Which type of enzyme is not a part of the oxidative phase of the Pentose Phosphate Pathway (PPP)?Group of answer choicesA. IsomeraseB. DehydrogenaseC. LactonaseD. KinaseE. All of the above take part in the oxidative phase of the PPP.
Solution
The oxidative phase of the Pentose Phosphate Pathway (PPP) involves three main enzymes: glucose-6-phosphate dehydrogenase, 6-phosphogluconolactonase, and 6-phosphogluconate dehydrogenase.
A. Isomerase - This enzyme is not involved in the oxidative phase of the PPP. It is involved in the non-oxidative phase.
B. Dehydrogenase - This enzyme is involved in the oxidative phase of the PPP. It helps in the conversion of glucose-6-phosphate to 6-phosphoglucono-δ-lactone and 6-phosphogluconate to ribulose-5-phosphate.
C. Lactonase - This enzyme is also involved in the oxidative phase of the PPP. It helps in the conversion of 6-phosphoglucono-δ-lactone to 6-phosphogluconate.
D. Kinase - This enzyme is not involved in the oxidative phase of the PPP. It is involved in the non-oxidative phase.
E. All of the above take part in the oxidative phase of the PPP - This statement is incorrect as both Isomerase and Kinase are not involved in the oxidative phase of the PPP.
Therefore, the correct answer is A. Isomerase and D. Kinase.
Similar Questions
1. The non-oxidative section of PPP is the second phase of the pathway and is responsible for the production of ribose-5-phosphateThe pentose phosphate pathway is an alternative pathway for glucose oxidation. It can be divided into two sections, one involving oxidative reactions and one involving non-oxidative reactions. What are the outcomes when: a. The oxidative section runs independently b. The non-oxidative section runs independently - Both the oxidative and non-oxidative sections run together c. Both the oxidative and non-oxidative sections run together.
The pentose phosphate pathway is regulated by __________*1 pointNone of these optionsAcetyl CoAAll optionsNADP+ATPNADPH
The non-oxidative stage of the pentose phosphate pathway ________.Answers: A. produces NADPH and releases CO2B. interconverts five carbon and six carbon sugarsC. contains two reactions whose enzymes are allosterically inhibited by NADPHD. consumes four ATP molecules
The pentose phosphate pathway could alternatively be called the pentose phosphate cycle because________ is a net product of the pathway that can be recycled. A. glucose 6-phosphate B. NADP+ C. carbon dioxide D. phosphate E. UDP
The pentose phosphate pathway occurs in the__________
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