Summarize the three requirements for cloning once a source of DNA has been selected. What will be an ideal response?
ANSWER: Once a DNA source has been selected, cloning requires (1) a way to cut the DNA at specific
sites to produce consistent, manageable pieces; (2) a carrier molecule to hold the DNA for
transfer to a host cell for cloning; and (3) a host cell in which many copies of the selected
DNA molecule can be produced.
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Island biogeography predicts that a single large area would have higher biodiversity than several small areas. However, in practice, several small areas could have an advantage for what reason(s)? Check all that apply.
A. Being less expensive B. Containing more habitat types C. Decreasing extinction risk from natural disasters D. Facilitating the spread of disease E. Minimizing edge effects
Louis Pasteur's experiment had a good design because _____
A) simple equipment was used B) a major question, spontaneous generation, was tested C) the possible outcomes led to distinct, unambiguous conclusions D) the experiment was a success
In prokaryotes, the RNA polymerase holoenzyme consists of
A. the core polymerase plus two alpha subunits. B. the core polymerase plus two beta subunits. C. the core polymerase plus two alpha subunits, two beta subunits, and a sigma subunit. D. the core polymerase plus a sigma subunit. E. two alpha subunits, two beta subunits, and two sigma subunits.
Chemical reactions may ______ energy.
a. absorb b. release c. require d. all of the above