What occurs when psoralens are exposed to UV light?
1. They inhibit DNA synthesis and arrest abnormal cell growth.
2. They increase cell growth.
3. They increase the size of plaques.
4. They produce a photosensitive reaction.
Correct Answer: 4
Rationale 1: Psoralens are oral or topical agents that, when exposed to UV light, produce a photosensitive reaction. This reaction seems to provide benefit to the patient by reducing the number of lesions.
Rationale 2: Psoralens are oral or topical agents that, when exposed to UV light, produce a photosensitive reaction. This reaction seems to provide benefit to the patient by reducing the number of lesions.
Rationale 3: Psoralens are oral or topical agents that, when exposed to UV light, produce a photosensitive reaction. This reaction seems to provide benefit to the patient by reducing the number of lesions.
Rationale 4: Psoralens are oral or topical agents that, when exposed to UV light, produce a photosensitive reaction. This reaction seems to provide benefit to the patient by reducing the number of lesions.
Global Rationale: Psoralens are oral or topical agents that, when exposed to UV light, produce a photosensitive reaction. This reaction seems to provide benefit to the patient by reducing the number of lesions. The other answer choices do not occur when psoralens are exposed to UV light.
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