Transcription factors account for a greater proportion of the proteome in a fetus compared to a 20-year-old because
A)many cells have already died in a 20-year-old.
B)a fetus does not yet need many of its proteins.
C)cells are actively differentiating,and many structures are forming in a fetus.
D)an adult can carry out more activities than can a fetus.

Question

Quizplus · Accepted Answer

A fetus is actively developing and differentiating its cells, requiring the activation and inactivation of many genes. Transcription factors play a crucial role in this process, leading to a higher proportion of the proteome being dedicated to these proteins in a fetus compared to a 20-year-old where much of the differentiation has already occurred.

Transcription Factors Account for a Greater Proportion of the Proteome