Viruses that infect bacteria, multiply and cause their lysis, are called

Options

A. lysozymes
B. lytic
C. lipolytic
D. lysogenic

Explanation

To answer the question, "Viruses that infect bacteria, multiply and cause their lysis, are called," we can follow these steps:

### Step 1: Understand the Types of Viruses
- There are different types of viruses that infect bacteria, primarily categorized into two cycles: lytic and lysogenic.

### Step 2: Define the Lytic Cycle
- In the lytic cycle, the bacteriophage (a virus that infects bacteria) attaches to a bacterial cell, injects its genetic material, and uses the bacterial machinery to replicate itself. This process leads to the production of new virus particles.

### Step 3: Identify the Result of the Lytic Cycle
- After replication, the new viruses cause the bacterial cell to lyse (break open), releasing the newly formed viruses into the environment to infect other bacterial cells.

### Step 4: Differentiate from the Lysogenic Cycle
- In contrast, during the lysogenic cycle, the bacteriophage integrates its genetic material into the bacterial DNA and remains dormant without causing immediate lysis. It can later enter the lytic cycle under certain conditions.

### Step 5: Conclusion
- Based on the definition and characteristics of the lytic cycle, the viruses that infect bacteria, multiply, and cause their lysis are called **lytic viruses**.

### Final Answer
- The correct answer is **lytic viruses**.

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