Explain why a cell needs both mRNA and tRNA in order to synthesize a protein. Explain the function of mRNA, the function of tRNA, and how tRNA and mRNA work together to put the right amino acids in the right sequence as the protein is synthesized.

Explanation:

Translation is the process of synthesis of protein from mRNA according to the codons in the mRNA. The mRNA contains the codon and the tRNA contains the anti-codon.

The mRNA molecule directs the  process of protein synthesis known as translation. The mRNA leaves the nucleus and in the cytoplasm it binds to the ribosome which connects mRNA and tRNA according to base sequences. The tRNA brings the amino to the ribosome according to the codon in mRNA. The tRNA code is called an anti-codon, which matches to the mRNA's codon. The ribosome connects the amino acids and the protein synthesis  is continues as long as it encounter stop codon in mRNA.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.