Question

question 10 of 10
protein synthesis in prokaryotes is much simpler and faster than it is in eukaryotes. which of the following would you expect to contribute to faster protein synthesis in prokaryotes?
a. prokaryotes need proteins more quickly than eukaryotes do.
b. mrna does not have to cross a membrane.
c. prokaryotes use a simpler genetic code than eukaryotes do.
d. dna is translated directly into protein in prokaryotes.

Explanation:

In prokaryotes, transcription and translation occur in the cytoplasm simultaneously. Since there is no nuclear membrane (unlike eukaryotes where mRNA has to exit the nucleus through the nuclear membrane), mRNA does not have to cross a membrane. This allows for faster protein synthesis.

• Option A is incorrect as it is not about a structural or process - related reason but a baseless claim about need.
• Option C is wrong because the genetic code is universal (with minor exceptions) for both prokaryotes and eukaryotes.
• Option D is incorrect because in both prokaryotes and eukaryotes, DNA is first transcribed into mRNA and then mRNA is translated into protein.

Answer:

B. mRNA does not have to cross a membrane.