Which is absent in Amoeba ?

Options

A. Golgi apparatus
B. Lysosome
C. Centriole
D. Plasmalemma.

Answer

To determine which structure is absent in Amoeba, we will analyze the provided options one by one.

### Step-by-Step Solution:

1. **Understanding Amoeba**:
- Amoeba is a unicellular eukaryote, which means it has a true nucleus and membrane-bound organelles.

2. **Evaluating the Options**:
- **Option 1: Golgi Apparatus**:
- The Golgi apparatus is involved in the modification and packaging of proteins. It is present in Amoeba, thus this option is incorrect.

- **Option 2: Lysosome**:
- Lysosomes contain digestive enzymes that help in the digestion of food within the Amoeba. They are essential for the organism's feeding process, so this option is also incorrect.

- **Option 3: Centriole**:
- Centrioles are cylindrical structures made of protein tubulin and are involved in the formation of spindle fibers during cell division. However, Amoeba reproduces through binary fission, which does not require spindle fibers (a process known as amitosis). Therefore, centrioles are absent in Amoeba, making this option correct.

- **Option 4: Plasma Lemma (Plasma Membrane)**:
- The plasma lemma, or plasma membrane, is the outer covering of the Amoeba and is responsible for the exchange of materials. This structure is present, so this option is incorrect.

3. **Conclusion**:
- The structure that is absent in Amoeba is the **Centriole**.

### Final Answer:
Centriole is absent in Amoeba.

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