Mature RBC contains `:-`

Options

A. Enzymes of TCA cycle
B. Glycolytic enzyme
C. Enzymes of Kreb cycle
D. All of above

Answer

**Step-by-Step Solution:**

1. **Understanding Mature RBCs**: Mature red blood cells (RBCs), also known as erythrocytes, are specialized cells in the blood that primarily function to transport oxygen from the lungs to various tissues in the body.

2. **Characteristics of Mature RBCs**: One of the key characteristics of mature RBCs is that they lack a nucleus. This absence of a nucleus is crucial as it allows more space for hemoglobin, the protein that binds oxygen.

3. **Absence of Organelles**: Due to the lack of a nucleus, mature RBCs also do not contain other organelles such as mitochondria. Mitochondria are typically responsible for producing ATP (adenosine triphosphate) through aerobic respiration.

4. **Energy Production in RBCs**: Since mature RBCs do not have mitochondria, they cannot produce ATP through aerobic respiration. Instead, they rely on glycolysis, a process that occurs in the cytoplasm, to generate energy. Glycolytic enzymes facilitate this process, allowing RBCs to produce ATP anaerobically.

5. **Conclusion**: Therefore, mature RBCs contain glycolytic enzymes as their primary means of energy production, and they lack a nucleus and mitochondria.

**Final Answer**: Mature RBCs contain glycolytic enzymes and lack a nucleus and mitochondria.

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