All are true regarding DDT, EXCEPT:
**Core Concept**
DDT (Dichlorodiphenyltrichloroethane) is an organochlorine insecticide that has been widely used for its effectiveness in controlling a broad spectrum of insects. However, its use has been restricted due to its persistence in the environment, potential to bioaccumulate, and toxicity to humans and wildlife.
**Why the Correct Answer is Right**
DDT works by inhibiting the action of the enzyme cytochrome P450 in insects, which is essential for the synthesis of the neurotransmitter dopamine. This results in an increase in the levels of dopamine, leading to hyperexcitability of the nervous system and ultimately causing the death of the insect. DDT is also known to affect the nervous system of mammals, including humans, although the mechanism is not as well understood.
**Why Each Wrong Option is Incorrect**
**Option A:** DDT is indeed a potent insecticide that has been used to control mosquitoes and other insects. It is also true that DDT has been linked to various health problems, including cancer and neurological disorders.
**Option B:** DDT has been shown to be highly effective in controlling mosquito populations, which can help prevent the spread of diseases such as malaria and dengue fever.
**Option C:** DDT has been banned in many countries due to its persistence in the environment and potential to bioaccumulate in the food chain.
**Clinical Pearl / High-Yield Fact**
It is essential to note that while DDT has been linked to various health problems, its use has also been instrumental in controlling the spread of diseases such as malaria and dengue fever in some regions.
**Correct Answer:** D.