Question

which of the following initiates protein synthesis in a cell by carrying specific instructions from the nucleus to the ribosomes?
a) trna
b) mrna
c) rrna

Explanation:

mRNA (messenger - RNA) carries genetic information from the nucleus (where DNA is located) to the ribosomes, which is crucial for initiating protein synthesis. tRNA (transfer - RNA) is involved in bringing amino acids to the ribosome during protein synthesis, and rRNA (ribosomal - RNA) is a component of the ribosome itself.

Answer:

mRNA