Question

2 multiple choice 1 point if a mutation caused a prokaryotic cell to develop a membrane - bound nucleus, which functional advantage would this provide compared to its original structure? faster protein synthesis because ribosomes would attach to the nuclear envelope. enhanced movement because the nucleus would control flagella activity. improved protection and regulation of genetic material, allowing more complex gene expression. increased energy production because the nucleus would store atp.

Explanation:

• Option 1: Ribosomes attach to the endoplasmic reticulum (in eukaryotes) or are free in the cytoplasm; the nuclear envelope isn't the site for ribosome attachment for protein synthesis, so this is incorrect.
• Option 2: The nucleus does not control flagella activity directly, and flagella movement is related to motor proteins and energy, not nucleus - flagella control, so this is incorrect.
• Option 3: In prokaryotes, genetic material is in the nucleoid (not membrane - bound). A membrane - bound nucleus in a mutated prokaryote (now more like a eukaryotic nucleus) can protect the DNA from damage and regulate access to it, allowing for more complex gene expression (like regulation of transcription, RNA processing etc.), so this is correct.
• Option 4: ATP is produced in mitochondria (or in prokaryotic cell membranes) and stored in the cytoplasm; the nucleus does not store ATP, so this is incorrect.

Answer:

C. Improved protection and regulation of genetic material, allowing more complex gene expression. (Here we assume the options are labeled as A, B, C, D with the third option being C. If the original options had different labels, adjust accordingly. Based on the given options, the correct one is the third option which we can label as C for clarity.)