What type of inhibitor is DDT?

DDT is a weak inhibitor of the ATPase of housefly muscle mitochondria in the absence of Mg2+ but an activator in the presence of Mg2+.

How does DDT work as a pesticide?

What is the mechanism of action of DDT? DDT affects the nervous system by interfering with normal nerve impulses (2). DDT causes the nerve cells to repeatedly generate an impulse which accounts for the repetitive body tremors seen in exposed animals (2).

What are uses of DDT?

Uses of DDT

Between the 1950s and the 1980s, DDT was widely used in the agricultural industry as an insecticide. The use of DDT to control diseases like typhus and malaria was not uncommon in the early 1940s. DDT acts upon the sodium ion channels in the neurons of insects, making them fire in a spontaneous manner.

How was DDT synthesized?

DDT, prepared by the reaction of chloral with chlorobenzene in the presence of sulfuric acid, was first made in 1874. Its insecticidal properties were discovered in 1939 by a Swiss chemist, Paul Hermann Müller.

The Pros and Cons of DDT - History and Environmental Impact

What is DDT biomagnification?

Biomagnification happens when toxic chemicals, like DDT, whose remains in the environment are consumed indirectly by organisms through food. When an organism in the higher food chain consumes the lower organism containing such chemicals, the chemicals can get accumulated in the higher organism.

What lead to DDT resistance in mosquitoes and how does it allow for resistance?

X-ray crystallography of the protein coded by the gene illustrated exactly how the mutation conferred resistance, by opening up the 'active site' where DDT molecules bind to the protein, so more can be broken down. This means that the mosquito can survive by breaking down the poison into non-toxic substances.

How does DDT affect food?

When an animal consumes food having DDT residue, the DDT accumulates in the tissue of the animal by a process called bioaccumulation. The higher an animal is on the food chain (e.g. tertiary consumer such as seals), the greater the concentration of DDT in their body as a result of a process called biomagnification.

What is DDT among the following?

DDT is a non-biodegradable pollutant.

What is DDT quizlet?

dichloro-diphenyl-trichloroethane.

What does DDT do to mosquitoes?

The notorious pesticide dichloro-diphenyl-trichloroethane (DDT), maligned for decades because of its alleged effect on ecosystems, is highly effective at repelling mosquitoes that are resistant to it, according to a new study published in August.

Is DDT an organophosphate?

Dichlorodiphenyltrichloroethane (DDT) is a representative organochlorine insecticide and a known endocrine disruptor. Malathion is an organophosphate insecticide and a next-generation pesticide.

Is DDT an enzyme inhibitor?

PAGE analysis of the various preparations of the enzyme showed that the inhibition of the enzyme activity by DDT was associated with the presence of a selective protein band with an apparent molecular mass of 23 kDa.

How is DDT metabolized in the body?

In the body, DDT converts into several breakdown products called metabolites, including the metabolite dichlorodiphenyldichloroethene (DDE). The body's fatty tissues store DDT and DDE. In pregnant women, DDT and DDE exposure can occur in the fetus.

Is DDT an endocrine disruptor?

DDT is known to negatively influence reproductive development via disruption of multiple endocrine pathways (Holm et al. 2006). Studies have reported that DDT disrupts both male and female reproductive organs.

Is DDT a non degradable pollutant?

DDT, plastics, polythene, bags, insecticides, pesticides, mercury, lead, arsenic, metal articles like aluminum cans, synthetic fibres, glass objects, iron products and silver foils are non-biodegradable pollutants.

Which of the following pollutants are responsible for the cause of smog *?

2. Which of the following pollutants are responsible for the cause of SMOG? Sol: (c) Both incinerators and emissions from vehicles.

How does DDT enter food chain?

Answer and Explanation: DDT enters the food chain after it gets spread, either from getting on insects, plants, or water runoff.

What trophic level does DDT enter a food web?

Answer and Explanation: DDT enters a food web at the lowest level, when small organisms like insects eat part of a plant infected with this toxic substance.

What does DDT do to animals?

DDT affects the central nervous system of insects and other animals. This results in hyperactivity, paralysis and death. DDT also affects eggshell production in birds and the endocrine system of most animals.

How did DDT affect mosquito evolution?

What happens then depends on whether DDT has been sprayed before. DDT-resistant mosquitoes were first detected in India in 1959, and they have increased so rapidly that when a local spray program is begun now, most mosquitoes become resistant in a matter of months rather than years.

How did insects become resistant to DDT quizlet?

The rapid rise in the percentage of mosquitoes resistant to DDT was most likely caused by natural selection in which mosquitoes resistant to DDT could survive and reproduce, while other mosquitoes could not. Suggest an explanation for the global spread of DDT resistance.

When DDT was first introduced insects were very susceptible to it the development of resistance to DDT by insects was the result of?

Question 14 3pts When DDT was first introduced; insects were very susceptible to it: Thedevelopment of resistance to DDT by insects was the result of special creation_ natural selection of individuals who expressed genes for resistance; the high biotic potential of insects.

What happens to the concentration of DDT as it moves through a food chain?

Answer and Explanation: As Dichlorodiphenyltrichloroethane (DDT) moves up the trophic levels in food chains, or food webs, its concentration increases.