Accurate Statement on Cellular and Viral Structures

Steps:

• Evaluate option A: Viruses consist of a protein capsid enclosing genetic material (DNA or RNA).
• Evaluate option B: Plant cell walls primarily contain cellulose; suberin is specific to certain tissues like cork.
• Evaluate option C: Plant cells have plasmodesmata for communication but lack centrioles, using alternative spindle formation.
• Evaluate option D: Prokaryotes lack membrane-bound organelles like endoplasmic reticulum; proteins are synthesized on free ribosomes.

Why A is correct:

• By definition, viruses are acellular entities with a protein coat (capsid) surrounding either RNA or DNA as their core genetic material.

Why the others are wrong:

• B: Suberin is a waterproofing polymer in secondary walls of specialized cells, not a general component like cellulose.
• C: Centrioles are absent in plant cells, which organize mitosis without them.
• D: Prokaryotic cells have no endoplasmic reticulum; they perform protein synthesis directly in the cytoplasm.

Final answer: A