Select the correct match of enzyme with its related function.

Options

A. DNA polymerase- Synthesis of DNA strands
B. Helicase - Unwinding of DNA helix
C. Ligase - Joins together short DNA segments
D. all of these.

Explanation

To solve the question of selecting the correct match of enzyme with its related function, we will analyze each enzyme and its function step by step:

### Step 1: Analyze DNA Polymerase
- **Function**: DNA polymerase is responsible for synthesizing new DNA strands during DNA replication.
- **Explanation**: During replication, DNA polymerase adds nucleotides to the growing DNA strand, using the original strand as a template. This enzyme is crucial for the duplication of genetic material.

### Step 2: Analyze Helicase
- **Function**: Helicase unwinds the DNA double helix.
- **Explanation**: Before DNA replication can occur, the DNA strands must be separated. Helicase enzyme facilitates this process by breaking the hydrogen bonds between the base pairs, allowing the two strands to open up.

### Step 3: Analyze Ligase
- **Function**: DNA ligase joins together short DNA segments.
- **Explanation**: During DNA replication, Okazaki fragments are formed on the lagging strand. DNA ligase is responsible for sealing these fragments together, thus ensuring the continuity of the DNA strand.

### Step 4: Conclusion
- After analyzing the functions of DNA polymerase, helicase, and ligase, we can conclude that all three enzymes are correctly matched with their respective functions. Therefore, the correct answer is option four, which states that all options are correct.

### Final Answer
The correct match of enzyme with its related function is:
1. DNA Polymerase - Synthesizes DNA strands.
2. Helicase - Unwinds the DNA helix.
3. Ligase - Joins short DNA segments.

Thus, the answer is option four: all of the above are correct.

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