Endomembrane system consists of many cell organelles and these organelles perform different functions.
Which of the following options represent correct functions of these organelles ?
a. Formation of steroid hormones
b. Formation of glycoprotein
c. Cell plate formation
d. Storage of water
e. Detoxification
f. Digestion
g. Aerobic Respiration
h. Photosynthesis

Options

A. All except a, d, g, h
B. All except g, h
C. All except d, g, h
D. All except a, g, h

Answer

To determine the correct functions of the organelles in the endomembrane system, we will analyze each option provided in the question. The endomembrane system consists of various organelles that work together to perform specific functions within the cell. The main organelles involved include the nuclear envelope, endoplasmic reticulum (both rough and smooth), Golgi apparatus, and lysosomes.

### Step-by-Step Solution:

1. **Identify the Organelles in the Endomembrane System**:
- The endomembrane system comprises the nuclear envelope, rough endoplasmic reticulum (RER), smooth endoplasmic reticulum (SER), Golgi apparatus, and lysosomes.

2. **Analyze Each Function**:
- **a. Formation of steroid hormones**: This function is primarily associated with the smooth endoplasmic reticulum (SER), which synthesizes lipids, including steroid hormones. **(True)**
- **b. Formation of glycoprotein**: The rough endoplasmic reticulum (RER) is involved in the synthesis of proteins that may be glycosylated to form glycoproteins. **(True)**
- **c. Cell plate formation**: This process occurs during plant cell division and involves the Golgi apparatus, which helps in the formation of the cell plate. **(True)**
- **d. Storage of water**: While vesicles can store various substances, the primary organelle for water storage is the vacuole, not typically considered part of the endomembrane system. **(False)**
- **e. Detoxification**: The smooth endoplasmic reticulum (SER) is involved in detoxifying harmful metabolic byproducts. **(True)**
- **f. Digestion**: Lysosomes are responsible for breaking down waste materials and cellular debris, thus playing a key role in digestion within the cell. **(True)**
- **g. Aerobic Respiration**: This process occurs in the mitochondria, which are not part of the endomembrane system. **(False)**
- **h. Photosynthesis**: This process takes place in chloroplasts, which are also not part of the endomembrane system. **(False)**

3. **Summarize the True and False Functions**:
- True functions: a, b, c, e, f
- False functions: d, g, h

4. **Determine the Correct Option**:
- Based on the analysis, the functions that are not part of the endomembrane system are d (storage of water), g (aerobic respiration), and h (photosynthesis). Therefore, the correct answer is **Option 3: all except D, G, and H**.

### Final Answer:
**Option 3: all except D, G, and H.**