Microbes

Step 1: Analyze Enzyme Locations:

• (A) NADP reductase: This enzyme is located on the stroma side of the thylakoid membrane. However, it is associated with Photosystem I (PS I). According to standard texts (e.g., NCERT), stroma lamellae membranes lack PS II and NADP reductase. This is why only cyclic photophosphorylation occurs there. Thus, placing it in stroma lamellae is a mismatch.
• (B) PEPcase: Found in the cytosol of Mesophyll cells in C plants. Correct.
• (C) RuBisCO: Found in the Bundle sheath cells of C plants (and mesophyll of C ). Correct.
• (D) ATP synthetase: Found in the thylakoid membrane of the Chloroplast. Correct.

Step 2: Conclusion:
Option (A) is the mismatched pair because the enzyme is absent in stroma lamellae.

During photorespiration, RuBisCo catalyzes oxygenation of RuBP (5-C) in the presence of O{2}. This reaction produces one molecule of 3-phosphoglycerate (3-C) and one molecule of 2-phosphoglycolate (2-C). 2-phosphoglycolate is further metabolized in peroxisomes and mitochondria, releasing CO{2}. This reduces photosynthetic efficiency.

1. Catalase catalyzes decomposition of H2O2 into H2O and O2.
2. Catalase requires Haem as prosthetic group for redox reaction.
3. Peroxidase, Hexokinase, Urease act on different substrates.
4. Hence correct answer is (2) Catalase, Haem.