Question

the diagram below shows part of protein synthesis in a cell. protein synthesis dna nucleus structure x ribosome cell membrane if structure x did not function correctly, which of the following would occur first? the mrna would not leave the nucleus. the amino acid chain would not be completed. the cell would not be able to move proteins through the cell membrane. the protein would be mutated, and the ribosome would stop functioning.

Explanation:

Structure X is a tRNA (transfer RNA), which brings amino acids to the ribosome during translation (protein synthesis). If tRNA (structure X) doesn't function correctly, it can't deliver amino acids to the ribosome, so the amino acid chain (polypeptide) being assembled at the ribosome would not be completed first. The mRNA leaving the nucleus is part of transcription (before translation), so that's not the first effect. Moving proteins through the cell membrane is post - translation and not the immediate first effect. A non - functional tRNA doesn't directly cause protein mutation or ribosome shutdown in the first instance; it first affects amino acid chain assembly.

Answer:

The amino acid chain would not be completed.