Question 5

mRNA is the type of RNA used to carry genetic code copied from DNA.

mRNA, or messenger RNA, plays a crucial role in the process of transcription, where it carries the genetic information from DNA to the ribosome for protein synthesis.

A) mRNA

This option is correct as mRNA is specifically designed to carry the genetic code transcribed from DNA. It serves as a template for translating the sequence of nucleotides into a sequence of amino acids during protein synthesis.

B) tRNA

tRNA, or transfer RNA, is not used to carry the genetic code from DNA. Instead, it functions to transport the appropriate amino acids to the ribosome, matching them to the corresponding codons on the mRNA during translation.

C) rRNA

rRNA, or ribosomal RNA, is a component of the ribosome itself and does not carry genetic information. Its primary role is to provide a site for protein synthesis but it does not serve as a carrier for the genetic code copied from DNA.

D) None of the above.

This option is incorrect because mRNA is indeed the type of RNA that carries genetic code from DNA. Therefore, stating that none of the provided options are correct is inaccurate.

Conclusion

mRNA is the definitive answer as it is essential for conveying genetic information from DNA to the cellular machinery responsible for protein synthesis. The other options either serve different functions in the process of translation or incorrectly imply that no RNA type carries genetic code, which is not the case.