Assertion: In the oxidation of monosaccharide first step is always phosphorylation
Reason : all mono saccharide are active with their phosphate derivatives

Options

A. If both assertion & Reason are ture & the Reason is a correct explanation of the Assertion
B. If both Assertion & Reason ar True but Reason is not a correct explantation of the Assertion
C. If Assertion is True but the Reason is False
D. If both Assertion & Reason are false

Answer

To analyze the assertion and reason provided in the question, we will break down the concepts step by step.

### Step 1: Understanding the Assertion
The assertion states that "In the oxidation of monosaccharide, the first step is always phosphorylation."

- **Explanation**: Phosphorylation is the process of adding a phosphate group to a molecule. In the context of monosaccharides, this is typically the first step in their metabolic pathways, such as glycolysis. For example, glucose is phosphorylated to form glucose-6-phosphate before further oxidation occurs.

### Step 2: Understanding the Reason
The reason states that "All monosaccharides are active with their phosphate derivatives."

- **Explanation**: This means that once monosaccharides are phosphorylated (i.e., have a phosphate group added), they become more reactive and can participate in various biochemical reactions. For instance, glucose-6-phosphate and fructose-6-phosphate are active forms of glucose and fructose, respectively, that can enter metabolic pathways.

### Step 3: Evaluating Both Statements
Now, we need to evaluate whether both the assertion and the reason are correct and if the reason correctly explains the assertion.

- The assertion is correct because phosphorylation is indeed the first step in the oxidation of monosaccharides in metabolic pathways like glycolysis.
- The reason is also correct as phosphorylated monosaccharides are indeed more reactive and can participate in further biochemical processes.

### Step 4: Conclusion
Since both the assertion and reason are correct, and the reason correctly explains the assertion, we can conclude that both statements are true.

### Final Answer
Both the assertion and the reason are correct, and the reason correctly explains the assertion.

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