A student wants to clone a DNA sequence of ~200 kb in length. Which vector would be most appropriate?

A) a plasmid
B) a bacteriophage
C) a bacterial artificial chromosome (BAC)
D) a plant virus
E) a large polypeptide


Answer: C

Biology & Microbiology

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What metabolism would be favored when there is a lack of electron acceptors?

A) anaerobic fermentation B) anoxygenic photosynthesis C) anoxic ammonia oxidation D) acetogenesis

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In the vertebrate kidney, reabsorption and secretion take place in the renal tubules; after that, the filtrate enters the collecting ducts as ____

Fill in the blank with the appropriate word.

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Assuming the plant survives, predict what would occur if you removed the shoot apical meristem of a plant embryo.

A. Growth would only occur at in the roots. B. The plant would grow two or more new shoot apical meristems. C. The root apical meristem would take over the function of the shoot apical meristem. D. The plant would mature, but only through vertical growth--no branches would form.

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According to the geological time scale, which segment of Earth’s history is the oldest?

a. Hadean eon b. Archean eon c. Proterozoic eon d. Paleozoic era e. Cenozoic era

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