Which pathway provides reducing equivalents (NADPH) and ribose-5-phosphate for biosynthesis and antioxidant defense rather than ATP?
Show answer and explanation
Correct answer: Pentose phosphate pathway (PPP)
The pentose phosphate pathway generates NADPH (for biosynthesis and redox balance) and ribose-5-phosphate (for nucleotide synthesis), serving anabolic and antioxidant functions rather than directly producing ATP.
Keep practicing
More Metabolic Pathways and Regulation questions
- During prolonged fasting, which enzyme is activated to promote gluconeogenesis from substrates like lactate or amino acids?
- Which enzyme in glycolysis is regulated both by allosteric effectors and by hormonal (covalent) modification in liver tissue?
- Which enzyme catalyzes the rate-limiting step of glycolysis and is strongly regulated by cellular energy status?
- What effect does high intracellular ATP concentration have on PFK-1 activity?
- Which metabolite can activate PFK-1 even in the presence of high ATP, thereby promoting glycolysis?
- Which three enzymes catalyze the essentially irreversible, regulatory steps of glycolysis?