Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong.

Options

A. Endoplasmic reticulum consists of a network of membranous tubules and helps in transport, synthesis and secretion.
B. Leucoplasts are bound by two membranes, lack pigment but contain their own DNA and protein synthesizing machinery.
C. Spherosomes are single membrane bound and are associated with synthesis and storage of lipids.
D. Lysosomes are single membrane vessicles budded off from ER and contain oxidative enzymes

Answer

To determine which of the four statements regarding cell organelles is incorrect, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1: Endoplasmic Reticulum (ER)**
- The endoplasmic reticulum consists of a network of membranous tubules and is involved in transport, synthesis, and secretion processes.
- **Analysis**: This statement is correct. The ER can be smooth (SER) or rough (RER), with the RER having ribosomes for protein synthesis and the SER involved in lipid synthesis.

2. **Statement 2: Leukoplasts**
- Leukoplasts are bound by two membranes, lack pigment, but contain their own DNA and protein-synthesizing machinery.
- **Analysis**: This statement is also correct. Leukoplasts are indeed colorless plastids that store starch and have their own DNA and ribosomes.

3. **Statement 3: Spherosomes**
- Spherosomes are single membrane-bound organelles associated with the synthesis and storage of lipids.
- **Analysis**: This statement is correct. Spherosomes are involved in lipid metabolism and storage.

4. **Statement 4: Lysosomes**
- Lysosomes are single membrane vesicles budded off from the ER and contain oxidative enzymes.
- **Analysis**: This statement is incorrect. Lysosomes are single membrane vesicles but are budded off from the Golgi apparatus, not the ER. Furthermore, they contain digestive (hydrolytic) enzymes, not oxidative enzymes.

### Conclusion:
The incorrect statement is:
**"Lysosomes are single membrane vesicles budded off from the ER and contain oxidative enzymes."**