Glycolysis occurs in the ______ and produces ________ ,which in the presense of `O_(2)` enters the ________.

Options

A. Cytosol, pyruvate, mitochondrion
B. Cytosol, glucose, mitochondrion
C. Mitochondrion, pyruvate, chloroplast
D. Chloroplast, glucose, cytosol

Answer

**Step-by-Step Solution:**

1. **Identify the location of glycolysis:** Glycolysis occurs in the cytoplasm of the cell. The cytoplasm is the fluid that fills the cell and contains various organelles.

2. **Determine the product of glycolysis:** The process of glycolysis breaks down glucose (a 6-carbon molecule) into two molecules of pyruvate (a 3-carbon molecule). Therefore, glycolysis produces pyruvate.

3. **Identify what happens in the presence of oxygen:** When oxygen is present, the pyruvate produced from glycolysis enters the mitochondria. This is where aerobic respiration occurs, leading to further energy production.

4. **Summarize the findings:** Therefore, the complete answer to the question is: Glycolysis occurs in the **cytoplasm** and produces **pyruvate**, which in the presence of O₂ enters the **mitochondria**.

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