Pigments of Photosynthesis quiz #2 Flashcards
Pigments of Photosynthesis quiz #2
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What is the function of carotenoids in photosynthesis?
Carotenoids function as accessory pigments that enhance light absorption by capturing different wavelengths of light, which chlorophyll a cannot absorb. What cells enable us to see in different colors?
Cone cells in the retina of the eye enable us to see in different colors by detecting various wavelengths of light. Which of the following statements are true of carotenoids? A) They are the main photosynthetic pigment. B) They reflect orange, red, and yellow wavelengths. C) They are found in the thylakoid membrane. D) They absorb green light.
B) They reflect orange, red, and yellow wavelengths. C) They are found in the thylakoid membrane. What is the main photosynthetic pigment found in chloroplasts?
The main photosynthetic pigment found in chloroplasts is chlorophyll a. How do accessory pigments contribute to photosynthesis?
Accessory pigments, like chlorophyll b and carotenoids, capture different wavelengths of light, enhancing the range of light absorbed for photosynthesis. What is the role of photosystems in photosynthesis?
Photosystems are complexes of pigments and proteins in the thylakoid membrane that facilitate light reactions by absorbing light energy. Why do plants appear green to our eyes?
Plants appear green because chlorophyll a reflects green wavelengths of light, which are perceived by our eyes. What is an absorption spectrum?
An absorption spectrum is a graph showing the light absorption of pigment molecules at different wavelengths. Where are photosystems located within the chloroplast?
Photosystems are located in the thylakoid membranes of chloroplasts. What happens to wavelengths of light that are not absorbed by pigments?
Wavelengths of light that are not absorbed by pigments are reflected, and these are the colors we perceive with our eyes. What is the primary pigment responsible for absorbing light energy during photosynthesis in plants?
Chlorophyll a is the primary pigment responsible for absorbing light energy during photosynthesis. Why do most plants appear green to our eyes?
Most plants appear green because chlorophyll a reflects green wavelengths of light, which is the color we perceive. What role do carotenoids play in photosynthesis?
Carotenoids act as accessory pigments, reflecting orange, red, and yellow light, and absorbing other wavelengths to assist in photosynthesis. Why is the absorption of different wavelengths by various pigments important for plants?
Absorbing different wavelengths allows plants to capture more of the available light energy, increasing the efficiency of photosynthesis. What is a photosystem and where is it found?
A photosystem is a complex of pigments, proteins, and other molecules found in the thylakoid membrane of chloroplasts. What is the function of the light harvesting complex in a photosystem?
The light harvesting complex contains accessory pigments that absorb photons and transfer energy to the reaction center. How do plants utilize absorbed light energy in photosynthesis?
Absorbed light energy excites electrons in pigment molecules, initiating the light reactions of photosynthesis. Why are carotenoids often associated with orange and yellow colors in plants?
Carotenoids reflect orange, red, and yellow wavelengths, making these colors visible in plant tissues. In which part of the chloroplast are photosystems embedded?
Photosystems are embedded in the thylakoid membrane of the chloroplast. How does the reflection and absorption of light by pigments affect the color of leaves?
The color of leaves is determined by the wavelengths of light reflected by pigments; for example, green is reflected by chlorophyll a.
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