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Tetracycline is an antibiotic that blocks tRNA from entering the ribosome and associating with mRNA. If the tetracycline were added to the cytoplasm of a eukaryotic cell, which types of proteins would be made?
A. Only proteins that will be exported outside the cell
B. Only proteins that will be inserted into a membrane
C. Only proteins that function in the cytoplasm of the cell
D. No proteins will be made if tRNA cannot bind to mRNA

Sagot :

Answer:

No proteins will be made if tRNA cannot bind to mRNA

Explanation:

If tRNA cannot bind to mRNA, amino acids cannot be bonded together to form a polypeptide chain.

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If the tetracycline is added to the cytoplasm of a eukaryotic cell, NO proteins will be made because tRNA cannot bind to mRNA (Option D is correct).

  • The transference RNAs (tRNAs) are fundamental during protein synthesis, (i.e., translation).

  • During translation, each triplet of nucleotides or 'codon' in the messenger RNA (mRNA) sequence binds by base complementarity to the anticodon of a given tRNA.

  • Each tRNA also contains a specific amino acid residue that is attached to its end, which is added to the nascent polypeptide chain in the ribosome.

  • Thus, the amino acids are specified by the codons of the mRNA sequence that bind to specific anticodons in tRNAs.

In conclusion, if the tetracycline is added to the cytoplasm of a eukaryotic cell, NO proteins will be made because tRNA cannot bind to mRNA (Option D is correct).

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