Question

which of the following best describes how a liver cell and skin cell have the exact same dna sequence and yet look different and perform different functions? (1 point)
the cells mutate during transcription.
the trna uses a different sequence in each cell during transcription.
the cells discard the dna that is not in use.
the proteins are expressed differently in each cell.

Explanation:

All cells in the body have the same DNA. Differences in cell - type appearance and function are due to differential gene expression. This means that different sets of genes are turned on or off in different cells, resulting in different proteins being produced. Mutations during transcription are rare and not the normal cause of cell - type differences. tRNA has a specific role in translation and its sequence is not the main factor in cell - type differences. Cells do not discard DNA that is not in use.

Answer:

The proteins are expressed differently in each cell.