Which technique is used to mass produce copies of a section of DNA outside of a cell?
a. Transcription
b. Translation
c. Electrophoresis
d. DNA sequencing
e. Polymerase chain reaction
e
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The coelacanth gave rise to the ____
a. ray-finned fish b. chimaeras c. tetrapods d. dogfish e. lungfish.
Explain the problems associated with the genetic disorder Tay-Sachs.
What will be an ideal response?
What key factor limits the number of trophic levels in an ecosystem?
a. maximum solar radiation b. energy loss c. herbivore size d. predator size e. climate
What is the correct order of the steps in the progression of lung cancer in a smoker?1. Cilia are lost2. There is a thickening and callusing of the cells lining the bronchi3. Metastasis occurs4. A tumor forms5. Cells with atypical nuclei appear
A. 5, 1, 2, 3, 4 B. 2, 1, 4, 5, 3 C. 1, 2, 4, 3, 5 D. 1, 2, 3, 4, 5 E. 2, 1, 5, 4, 3