In glycolysis ultimately:

Options

A. starch is converted into glucose
B. glucose is converted into fructose
C. protein is converted into glucose
D. glucose is converted into pyruy acid

Explanation

**Step-by-Step Solution:**

1. **Understanding Glycolysis**: Glycolysis is a metabolic pathway that breaks down glucose to extract energy. It occurs in the cytoplasm of both aerobic (with oxygen) and anaerobic (without oxygen) organisms.

2. **Starting Material**: The process begins with glucose, which is a six-carbon sugar molecule.

3. **Conversion Process**: During glycolysis, glucose undergoes a series of enzymatic reactions. It is phosphorylated and eventually split into two three-carbon molecules.

4. **Final Product**: The ultimate product of glycolysis is pyruvate (also known as pyruvic acid). Each glucose molecule is converted into two molecules of pyruvate.

5. **Energy Production**: Along with the production of pyruvate, glycolysis also generates a small amount of energy in the form of ATP (adenosine triphosphate) and NADH (nicotinamide adenine dinucleotide).

6. **Conclusion**: Therefore, the ultimate outcome of glycolysis is the conversion of glucose into pyruvate.

**Final Answer**: In glycolysis, ultimately, glucose is converted into pyruvate.

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