Which of the following represents the features of lysosomes ?

Options

A. A lower pH than the cytoplasm
B. Redused hydrolase activity
C. Double membrane envelope
D. All of these

Explanation

To determine the features of lysosomes, we need to analyze the given options based on the characteristics of lysosomes. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Structure of Lysosomes
Lysosomes are single membrane-bound organelles found in eukaryotic cells. They contain hydrolytic enzymes that are crucial for breaking down various biomolecules.

**Hint:** Remember that lysosomes are characterized by their single membrane structure.

### Step 2: Analyze the pH of Lysosomes
The internal environment of lysosomes is acidic, with a pH ranging from about 4.8 to 5. This acidic pH is essential for the optimal activity of the hydrolytic enzymes contained within them.

**Hint:** Compare the pH of lysosomes with that of the cytoplasm, which is around 7 to 7.2.

### Step 3: Evaluate the Hydrolytic Activity
Lysosomes have high hydrolytic activity due to the presence of acid hydrolases. These enzymes are specifically adapted to function in the acidic environment of the lysosome.

**Hint:** Hydrolytic activity in lysosomes is high, not reduced.

### Step 4: Check the Membrane Structure
Lysosomes are not double membrane-bound; they are single membrane-bound organelles. This distinguishes them from other organelles like mitochondria and the nucleus.

**Hint:** Recall that lysosomes have a single membrane, unlike some other organelles.

### Step 5: Review the Options
Now, let’s review the options provided:
1. Lower pH than the cytoplasm - **Correct**
2. Reduced hydrolytic activity - **Incorrect**
3. Double membrane envelope - **Incorrect**
4. All of these - **Incorrect**

Based on the analysis, the only correct statement regarding lysosomes is that they have a lower pH than the cytoplasm.

### Final Answer
The feature of lysosomes that is correct is: **Lower pH than the cytoplasm.**

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