Which match among the given is false?

Options

A. `CO_(2)` acceptor in the mesophyll cell of maize is a three-carbon compound
B. common substrate in both the aldolase catalysed reactions in PCR cycle-DHAP
C. triose sugar formed by reduction of 1,3 bis phosphoglyceric acid in bundle sheath cell of `C_(4)` plant-PGA
D. common product produced in both the transketolase catalysed reactions in PCR cycle-xylulose-5-phosphate

Answer

To determine which match among the given statements is false, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1: CO2 accepted in the mesophyll cells of maize is a 3-carbon compound.**
- In C4 plants like maize, CO2 is initially fixed in the mesophyll cells. The primary molecule that accepts CO2 is phosphoenolpyruvate (PEP), which combines with CO2 to form oxaloacetate, a 4-carbon compound. This statement is misleading because it refers to CO2 as a 3-carbon compound, which is incorrect. The correct initial fixation product is a 4-carbon compound, not a 3-carbon compound.
- **Conclusion:** This statement is **false**.

2. **Statement 2: Common substrate in both the aldolase catalyzed reactions in the PCR cycle is DHAP.**
- In the photosynthetic carbon reduction (PCR) cycle, dihydroxyacetone phosphate (DHAP) is indeed a common substrate for aldolase reactions. Aldolase catalyzes the condensation of DHAP with glyceraldehyde 3-phosphate to form fructose 1,6-bisphosphate, among other reactions. This statement is **true**.

3. **Statement 3: Triosugar formed by reduction of 1,3-bisphosphoglyceric acid in bundle sheath cells of C4 plants is PGA.**
- The reduction of 1,3-bisphosphoglycerate (1,3-BPG) in the bundle sheath cells leads to the formation of glyceraldehyde 3-phosphate (G3P), not phosphoglycerate (PGA). Therefore, this statement is **false**.

4. **Statement 4: Common product produced in both the transketolase catalyzed reactions in the PCR cycle is xylulose 5-phosphate.**
- In the transketolase reactions of the PCR cycle, xylulose 5-phosphate is indeed a common product formed from the rearrangement of carbon skeletons. This statement is **true**.

### Final Conclusion:
The false statements are **Statement 1** and **Statement 3**. However, since the question asks for one false match, we can conclude that **Statement 3** is the most directly incorrect regarding the specific product formed in the bundle sheath cells of C4 plants.

### Answer:
**The false statement is: "Triosugar formed by reduction of 1,3-bisphosphoglyceric acid in bundle sheath cells of C4 plants is PGA."**

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