Question

which of the following statements is true? only bacteria have histones associated with dna. archaea and bacteria have identical membrane lipids. the cell walls of archaea lack peptidoglycan. no archaea are capable of using co₂ to oxidize h₂, releasing methane.

Explanation:

• Analyze each option:
• Option 1: Bacteria do not have histones associated with DNA (archaea and eukaryotes can have histones), so this is false.
• Option 2: Archaea and bacteria have different membrane lipids (archaea have ether - linked lipids, bacteria have ester - linked lipids), so this is false.
• Option 3: Archaeal cell walls indeed lack peptidoglycan (bacterial cell walls often have peptidoglycan), so this is true.
• Option 4: Some archaea (methanogens) can use \(CO_2\) to oxidize \(H_2\) and release methane, so this is false.

Answer:

The cell walls of archaea lack peptidoglycan.