Question

Match List-I with List-II

Choose the correct answer from the options given below:

• (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

Remember the organelle sequence of the photorespiratory cycle: Chloroplast \(\rightarrow\) Peroxisome \(\rightarrow\) Mitochondria \(\rightarrow\) Peroxisome \(\rightarrow\) Chloroplast.
Glycolate oxidase is a marker enzyme for peroxisomes, which immediately pairs (A) with (II).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The photorespiratory \(C_2\) cycle in plants involves a metabolic pathway whose reactions are distributed across three organelles: chloroplasts, peroxisomes, and mitochondria.

Step 2: Detailed Explanation:
Let us match each enzyme with its subcellular location:
(A) Glycolate oxidase catalyzes the oxidation of glycolate to glyoxylate in the Peroxisome (II).
(B) Glycine decarboxylase is a multi-enzyme system located in the Mitochondria (I), where it converts two molecules of glycine into one molecule of serine.
(C) Glycerate kinase is the final enzyme of the salvage pathway, catalyzing the phosphorylation of glycerate to 3-phosphoglycerate within the Chloroplast (IV).
(D) NADPH-dependent hydroxypyruvate reductase 2 is located in the Cytosol (III), where it plays a role in alternative bypass pathways for photorespiratory intermediates.
This matching sequence is: (A) - (II), (B) - (I), (C) - (IV), (D) - (III).

Step 3: Final Answer:
This sequence corresponds to option (C).