Which of the following is an incorrect match ?

Options

A. First product in `C_3` cycle , 3- Phosphoglyceric acid
B. Ribulose - 1, 5 - biphosphate (RuBP) : 5 carbon aldose sugar
C. Kranz anatomy in leaves : `C_4` plants
D. Non - cyclic photophosphorylation : Grana .

Answer

To solve the question of which of the following is an incorrect match, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understand the C3 Cycle**:
- The C3 cycle, also known as the Calvin cycle, is a part of photosynthesis where carbon dioxide is fixed into a stable 3-carbon compound.
- The first product formed in the C3 cycle is **3-phosphoglyceric acid (3-PGA)**.

**Hint**: Recall that the C3 cycle produces a 3-carbon compound as its first stable product.

2. **Evaluate Option 1**:
- Option 1 states that the first product in the C3 cycle is phosphoglyceric acid.
- Since 3-phosphoglyceric acid is indeed the first stable product, this option is **correct**.

**Hint**: Confirm the first product of the C3 cycle from your knowledge of photosynthesis.

3. **Evaluate Option 2**:
- Option 2 states that Ribulose-1,5-bisphosphate (RuBP) is a 5-carbon aldose sugar.
- RuBP is a 5-carbon sugar, but it is not an aldose; it is classified as a **ketopentose** because it contains a ketone group.

**Hint**: Differentiate between aldose and ketose sugars based on their functional groups.

4. **Conclusion for Option 2**:
- Since RuBP is incorrectly described as an aldose sugar, this makes Option 2 an **incorrect match**.

**Hint**: Remember the classification of sugars based on their carbon skeleton and functional groups.

5. **Evaluate Other Options**:
- Option 3 states that trans-anatomy in leaves is matched with C4 plants. This is a correct association as C4 plants exhibit specific leaf anatomy for efficient photosynthesis.
- Option 4 states that non-cyclic photophosphorylation occurs in the grana of chloroplasts, which is also correct.

**Hint**: Review the anatomy of C4 plants and the location of photophosphorylation in chloroplasts.

6. **Final Answer**:
- The only incorrect match among the options provided is **Option 2**: Ribulose-1,5-bisphosphate is not a 5-carbon aldose sugar but a ketopentose.

### Summary:
The incorrect match is **Option 2**: Ribulose-1,5-bisphosphate (RuBP) is not an aldose sugar; it is a ketopentose sugar.