Multiple Choice
Which organelle is found in plant cells (and many algae) but not in animal cells and is responsible for photosynthesis?
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12. Photosynthesis
Chloroplast
Multiple Choice
Which pigment in chloroplasts directly absorbs light energy to drive photosynthesis?
A
Hemoglobin
B
Chlorophyll (especially chlorophyll a)
C
Keratin
D
Melanin
Verified step by step guidance1
Identify the role of pigments in chloroplasts: Pigments are molecules that absorb light energy, which is essential for photosynthesis.
Recall the main pigments found in chloroplasts: The primary pigments are chlorophyll a, chlorophyll b, and carotenoids.
Understand which pigment directly absorbs light energy to drive photosynthesis: Chlorophyll a is the key pigment that captures light energy and initiates the photosynthetic process.
Eliminate other options based on their biological roles: Hemoglobin is involved in oxygen transport in animals, keratin is a structural protein in skin and hair, and melanin is a pigment in animal skin and hair, not involved in photosynthesis.
Conclude that chlorophyll (especially chlorophyll a) is the pigment in chloroplasts that directly absorbs light energy to drive photosynthesis.
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