The effect of the drug fluoxetine (Prozac) on isolated rat brain mitochondria was examined by measuring the rate of electron transport in the presence of various concentrations of substrates and inhibitors. Use the following information to answer the questions posed below. Pyruvate and L-malate, are substrates that exhibit a P:O ratio of 2.5. Succinate is a substrate that exhibits a P:O ratio of 1.5, while tetramethylpara-phenylene diamine (TMPD) is a substrate that donates 2 electrons directly to Complex IV and exhibits a P:O ratio of 1. Rotenone is a plant toxin that blocks electron transport at Complex I. Required:
a. How do pyruvate and L-malate serve as substrates for electron transport?
b. How does fluoxetine effect the electron transport chain (ETC) and at which specific step(s)?

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Donde se encuentra el adn nuclear en un organismo eucariota?

Which of the following is not a technology that can be used to conserve resources? a. hydropower b. volcanic power c. natural gas d. geothermal select the best answer from the choices provided a b c d