The substrate of Photorespiration is :

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Q: 152 (SSC/NA)
The substrate of Photorespiration is :

question_subject: 

Science

question_exam: 

SSC

stats: 

0,1,15,5,5,1,5

keywords: 

{'photorespiration': [2, 0, 0, 1], 'glucose': [8, 0, 3, 5], 'fructose': [1, 0, 0, 0], 'substrate': [2, 0, 0, 0], 'pyruvic acid': [3, 0, 1, 2], 'glycolate': [2, 0, 0, 0]}

Option 1: Fructose is a sugar molecule and is not the substrate of photorespiration.

Option 2: Pyruvic acid is an intermediate product of glycolysis and is not directly involved in photorespiration.

Option 3: Glycolate is indeed the substrate of photorespiration. During the process of photorespiration, the enzyme Rubisco catalyzes the reaction between oxygen and ribulose-1,5-bisphosphate (RuBP), producing phosphoglycolate. This phosphoglycolate is then converted to glycolate, which enters the peroxisome and mitochondria, undergoing a series of reactions to form glycine and serine.

Option 4: Glucose is not directly involved in the process of photorespiration.

Therefore, the correct answer is option 3: Glycolate is the substrate of photorespiration.