Gene shear breaks

Options

A. mRNA
B. rRNA
C. DNA
D. tRNA

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about "gene shear breaks," which refers to the fragments formed during the processing of RNA.

2. **Identifying the Options**: The options provided are:
- a) mRNA
- b) rRNA
- c) DNA
- d) tRNA

3. **Analyzing tRNA**:
- tRNA (transfer RNA) is involved in the translation process, where it helps in decoding mRNA into proteins.
- Since gene shear breaks are related to RNA processing, tRNA does not play a role in the formation of gene shear breaks.
- **Conclusion**: tRNA is not the correct answer.

4. **Analyzing rRNA**:
- rRNA (ribosomal RNA) is a component of ribosomes and plays a role in protein synthesis but does not directly relate to the processing of mRNA or the formation of gene shear breaks.
- **Conclusion**: rRNA is not the correct answer.

5. **Analyzing DNA**:
- DNA contains both coding regions (exons) and non-coding regions (introns).
- During transcription, DNA is transcribed into pre-mRNA, which also contains both exons and introns.
- The introns are removed through a process called splicing to form mature mRNA.
- However, gene shear breaks specifically refer to the fragmentation of mRNA, not DNA itself.
- **Conclusion**: DNA is not the correct answer.

6. **Analyzing mRNA**:
- mRNA (messenger RNA) is the product of transcription from DNA and carries the genetic information to be translated into proteins.
- During the processing of mRNA, it can be fragmented or sheared, leading to the formation of gene shear breaks.
- These breaks in mRNA result in the loss of its ability to convey genetic information.
- **Conclusion**: mRNA is the correct answer.

7. **Final Answer**: The correct option for "gene shear breaks" is **mRNA**.