Question

which structures are found in each cell type? complete the table.
prokaryotic cells plant cells animal cells
chloroplasts
smooth endoplasmic reticulum
ribosomes

Explanation:

• Chloroplasts: These are organelles for photosynthesis. Prokaryotes lack membrane - bound organelles (except for some invaginated membrane structures that are not chloroplasts). Animal cells do not perform photosynthesis, so no chloroplasts. Plant cells (specifically in photosynthetic parts like leaves) have chloroplasts.
• Smooth endoplasmic reticulum: It is a membrane - bound organelle involved in lipid synthesis, detoxification etc. Prokaryotes lack membrane - bound organelles. Both plant and animal cells (as eukaryotes) have smooth endoplasmic reticulum.
• Ribosomes: These are non - membrane - bound organelles (in prokaryotes, they are 70S; in eukaryotes, 80S but with some 70S in mitochondria and chloroplasts) and are essential for protein synthesis. All cells (prokaryotic, plant, animal) need to synthesize proteins, so they all have ribosomes.

Answer:

• Chloroplasts: Prokaryotic cells - no, Plant cells - yes, Animal cells - no
• Smooth endoplasmic reticulum: Prokaryotic cells - no, Plant cells - yes, Animal cells - yes
• Ribosomes: Prokaryotic cells - yes, Plant cells - yes, Animal cells - yes