Cyclic electron flow may be photoprotective

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39) Cyclic electron flow may be photoprotective (protective to light-induced damage). Which of the following experiments could provide information on this phenomenon? A) using mutated organisms that can grow but that cannot carry out cyclic flow of electrons and compare their abilities to photosynthesize in different light intensities B) using plants that can carry out both linear and cyclic electron flow, or only one or another of thee processes, and measuring their light absorbance C) using bacteria that have only cyclic flow and look for their frequency of mutation damage D) using bacteria with only cyclic flow and measuring the number and types of photosynthetic pigments they have in their membranes E) using plants with only photosystem I operative and measure how much damage occurs at different wavelengths. Answer: A Topic: Concept 10.2 Skill: Synthesis/Evaluation 40) Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. What related function do they have in plants? 41) In thylakoids, protons travel through ATP synthase from the stroma to the thylakoid space. Therefore the catalytic "knobs" of ATP synthase would be located 42) Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
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