DNA : heredity :: mRNA : ________

Explanation

To solve the analogy "DNA : heredity :: mRNA : ________", we need to understand the relationship between DNA and heredity, and then find a similar relationship for mRNA.

1. **Understanding the first part of the analogy**:
- DNA is known as the genetic material that carries hereditary information in living organisms. It contains the instructions needed for an organism to develop, survive, and reproduce. Thus, DNA is directly linked to the concept of heredity.

2. **Analyzing the second part of the analogy**:
- mRNA, or messenger RNA, is a type of RNA that is transcribed from DNA. Its primary role is to carry the genetic information from DNA to the ribosomes, where proteins are synthesized. Therefore, mRNA is essential for the process of protein synthesis.

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