48. Consider the average in vivo turnover rates for proteins, DNA, and mRNA. Which of the following orders best describes the turnover rate from fastest (shortest average lifetime) to slowest (longest average lifetime)? (A) mRNA ＞ DNA ＞ proteins (B) mRNA ＞ proteins ＞ DNA (C) Proteins ＞ mRNA ＞ DNA (D) Proteins ＞ DNA ＞ mRNA (E) DNA ＞ mRNA ＞ proteins