Question

organelles found only in plant cells include
a smooth er
b lysosomes
c cell walls
d ribosomes

Explanation:

• Smooth ER (endoplasmic reticulum) is found in both plant and animal cells. It is involved in lipid synthesis and detoxification.
• Lysosomes are mainly associated with animal cells. They contain digestive enzymes. In plants, vacuoles can sometimes perform similar functions but lysosomes as distinct organelles are not exclusive to plants.
• Cell walls are a characteristic feature of plant cells (also found in fungi and some prokaryotes). They provide structural support and protection. Animal cells do not have cell walls.
• Ribosomes are found in all cells (prokaryotic and eukaryotic, including plant and animal cells). They are involved in protein synthesis.

Answer:

C. cell walls