Practice question

MCQ

Question

A green leaf cell contains approximately 20–40 double-membrane organelles. Each contains chlorophyll and carotenoid pigments and possesses thylakoids within a stroma.
Which inference best integrates these observations?

Options

Choose one · Correct answer highlighted

The cell is probably a mesophyll cell, and the organelles are chloroplasts that trap light energy for photosynthesis. Correct The cell is probably an animal cell, and the organelles are mitochondria performing intracellular digestion. The cell is a bacterium, and the structures are inclusion bodies storing pigments. The cell is a sieve-tube cell, and the structures are lysosomes containing chlorophyll.

Explanation

Most chloroplasts of green plants occur in leaf mesophyll cells, where approximately 20–40 may occur per cell. Chloroplasts contain chlorophyll and carotenoids that trap light energy required for photosynthesis.

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A green leaf cell contains approximately 20–40 double-membrane organelles. Each contains chlorophyll and carotenoid pigments and possesses thylakoids within a stroma. Which inference best integrates these observations?