"Sticky ends" are produced as a result of the action of ________
A) PCR
B) DNA ligase
C) restriction enzymes
D) bacterial plasmids
C
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Using the NeoR/Tk system of introducing gene replacements into mice (as described in the text), which of the following would identify those mouse cells that were the result of homologous recombination?
A. NeoR only B. Tk only C. NeoR and Tk D. Neither NeoR or Tk
The chytrid Batrachochytrium dendrobatidis is responsible for a disease that ____
a. is sexually transmitted in humans b. has wiped out many species of frogs c. infects wheat, rye, and other grain crops d. is killing trees in temperate forests e. kills millions of humans each year
About twelve to twenty-four hours after the previous
meal, a person’s blood-sugar level normally varies from 60 to 90 milligrams per 100 milliliters of blood, though it may rise to 130 mg/100 ml after meals high in carbohydrates. That the blood-sugar level is maintained within a fairly narrow range despite uneven intake of sugar is due to the body’s ability to carry out a. adaptation. b. inheritance. c. metabolism. d. homeostasis. e. all of these.
Mamadou has started to experience severe pain due to kidney stones, which he has developed for the first time in his life. A bone scan shows that his bones are losing calcium at an alarming rate and becoming weakened
Based on the information in this chapter, predict what his physician is most likely to look for.