Steward Linn and Wernee Arber (1963) isolated two enzymes which restricted the growth of bacteriophage in bacterium E. coli.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question states that Steward Linn and Wernee Arber isolated two enzymes that restricted the growth of bacteriophage in the bacterium E. coli. We need to determine if this statement is true or false.

2. **Identifying the Enzymes**: The enzymes isolated by Steward Linn and Wernee Arber are known as restriction endonucleases. These enzymes are often referred to as "molecular scissors" because they cut DNA at specific sequences.

3. **Function of Restriction Endonucleases**: Restriction endonucleases do not directly restrict the growth of bacteriophages. Instead, they cut the viral DNA at specific palindromic sequences, which can prevent the bacteriophage from successfully infecting the bacteria.

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