MPSC PYQ

MPSC Rajyaseva 2022 GS Paper 1 — Question 49

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झाडांच्या श्वासोच्छवासाच्या क्रेब्च्या चक्रादरम्यान खालीलपैकी कोणत्या प्रक्रियेद्वारे फ्यूमॅरीक अॅसिडचे रूपांतर मॅलीक अॅसिड मध्ये होते ? During Krebs cycle in respiration, fumaric acid gets converted into malic acid by

1)डिकार्बोक्सिलेशन (decarboxylation)
2)डिहायड्रोजिनीनेशन (dehydrogenation)
3)डिहायड्रेशन (dehydration)
4)हायड्रेशन (hydration)✓ Correct

During the Krebs cycle (citric acid cycle) in cellular respiration, fumaric acid is converted into malic acid through the addition of a water molecule, which is known as a hydration reaction. Note: MPSC's official key gives option 2 (dehydrogenation), but the fumarate-to-malate step is catalysed by fumarase and adds a water molecule, which is hydration; this site keeps the scientifically correct answer.

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