Correct, if false, by changing only the bold words: bDuring splicing exons are removed and introns are joined together.

Explanation

**Step-by-Step Solution:**

1. **Identify the Original Statement:** The original statement is: "During splicing exons are removed and introns are joined together."

2. **Analyze the Statement:** In the process of splicing, the roles of exons and introns are crucial. Exons are the coding sequences that remain in the final mRNA, while introns are the non-coding sequences that are removed.

3. **Correct the Statement:** The correct process during splicing is that introns are removed and exons are joined together. Therefore, the corrected statement should read: "During splicing, introns are removed and exons are joined together."

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