Developers wish to build a road through an isolated area where few people have ever visited before. The proposed route is wet and warm, with many species of wild rodents and other mammals. What issues concerning disease might this route raise?
What will be an ideal response?
People will come in contact with ticks and other blood-sucking vectors and then may fall victim to some unexpected infectious diseases. Wild animals can serve as reservoirs of pathogens that can move to humans. Additionally, the human activity along the road may chase away predators that would have kept the rodent population in check. Finally, the number of species of wild mammals is a key factor in determining where new infectious diseases will emerge.
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Within the control region of the trp operon is a section of DNA that is sensitive to levels of tryptophan in the system. What is the name of this region?
What will be an ideal response?
Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Cellular organization B. Energy utilization C. Evolutionary adaptation D. Homeostasis E. Sensitivity
A gene that can cause cancer when present in a single copy in a cell is called a(n)
A) oncogene. B) tumor-suppressor gene. C) proto-oncogene.
Translation is a relatively slow process.
Answer the following statement true (T) or false (F)