What enzyme will not be used if the oxidative portion of the pentose phosphate pathway is operating to produce ribose 5-phosphate? a) Transaldolase b) Ribulose 5-phosphate isomerase

Biochemistry
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ISBN:9781319114671
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Chapter1: Biochemistry: An Evolving Science
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What enzyme will not be used if the oxidative portion of the pentose phosphate pathway is operating to produce ribose 5-phosphate?

a) Transaldolase
b) Ribulose 5-phosphate isomerase
Expert Solution
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Pentose phosphate pathway:

  • The pentose phosphate pathway is an alternative pathway for the metabolism of glucose.
  • It is a more complex pathway than glycolysis and is also known as hexose monophosphate shunt (HMP).
  • It occurs in cytosol and oxidation occurs by dehydrogenation using NADP+ and not NAD+.
  • The pathway provides a major portion of the cell's NADPH, which function as a biochemical reductant.
  • It also produces ribose phosphate that is required for the biosynthesis of nucleotides. 
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