Which of the following statements about incinerators if FALSE?
a. Incinerators reduce the volume of material that needs to be landfilled.
b. Incinerators are expensive to build and operate.
c. The burning of waste reduces the toxic and hazardous materials in the waste stream as the heat neutralizes the toxins.
d. Burning solid waste in incinerators can be used to produce energy.
c. The burning of waste reduces the toxic and hazardous materials in the waste stream as the heat neutralizes the toxins.
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What is the function of the sliding clamp in DNA replication?
a. unwind DNA ahead of the replication fork b. anchor DNA polymerase to the template strand c. remove DNA polymerase from the template strand d. anchor primase to the template strand e. bind to single stranded DNA to stabilize it before it is replicated
All animals use forms of the pigment retinal in their photoreceptors to absorb light energy. What vitamin is retinal synthesized from?
1.Vitamin A 2.Vitamin C 3.Vitamin D 4.Vitamin E
It has been difficult to generate drugs to treat AIDS for which reason?
a. HIV does not cause AIDS. b. HIV does not use any enzymes that can be targeted by drugs. c. HIV mutates rapidly. d. The only way to kill a virus is with a vaccine, not with drugs. e. People with HIV infections die rapidly, before the drugs have a chance to cure them.
In the accompanying figure, the gull has the highest concentration of DDT because it is:
a. a more complex organism. b. an older organism. c. at the bottom of the food chain. d. at the top of the food chain. e. homoeothermic (warm-blooded).