Question

1. what replaces peptidoglycan in archaea cell walls?

organelles
an s - layer
amino acids
dna

Explanation:

To solve this, we analyze each option:

• Organelles are cell structures, not a cell wall component replacement.
• Archaea lack peptidoglycan; many have an S - layer (a surface layer) in their cell walls as a replacement.
• Amino acids are building blocks, not a cell wall replacement.
• DNA is genetic material, not related to cell wall structure.

Answer:

B. an S - layer