At cellular level GH affects growth by controlling the production of

Options

A. r-RNA
B. m-RNA
C. t-RNA
D. None of these

Answer

To answer the question, "At cellular level GH affects growth by controlling the production of," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Source of Growth Hormone (GH)**:
- Growth hormone is primarily produced by the anterior lobe of the pituitary gland. This is essential to understand its role in growth.

2. **Understand the Role of Growth Hormone**:
- GH is involved in promoting growth at the cellular level. It influences various metabolic processes that lead to cell growth and tissue development.

3. **Determine the Types of RNA**:
- The question provides options: rRNA (ribosomal RNA), mRNA (messenger RNA), tRNA (transfer RNA), and "none of these." We need to identify which type of RNA GH controls the production of.

4. **Focus on mRNA**:
- Growth hormone primarily affects the production of mRNA. mRNA is crucial because it carries the genetic information from DNA to the ribosomes, where proteins are synthesized.

5. **Understand the Process of Protein Synthesis**:
- The mRNA produced is translated into proteins, which are vital for various cellular functions, including growth. Proteins synthesized from mRNA are responsible for gene expression and the manifestation of traits.

6. **Conclusion**:
- Given the role of mRNA in protein synthesis and its importance in growth processes, the correct answer to the question is **mRNA**.

### Final Answer:
The correct answer is **mRNA** (option 2).

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