Lichens are:
A) fungi adapted for life in rocky soil.
B) algae-like fungi.
C) fungi that grow on the roots of plants.
D) a mutualistic association of algae or photosynthetic bacteria and fungi.
Answer: D
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Which of the following is not true of gene regulation by DNA looping?
A. The precise distance between the regulatory sequence and the promoter is important. B. It can result in gene repression. C. It can result in gene activation. D. It can result in the regulation of a gene even thousands of base pairs away from the regulatory site.
Deterioration in the myelin sheaths of motor axons to
the lower leg would be expected to a. remove the restraints to ion movement and speed up impulse transmission. b. cause immobility of the leg due to cessation of impulses to leg muscles. c. slow the rate of transmission and cause reduced motor control. d. have little effect because the sheaths are for insulation only. e. do none of these.
Molecular biologists rely on many, often sophisticated, techniques to pursue their discipline. Ultracentrifugation, electron microscopy, X-ray diffraction, electrophoresis, and computer interfacing are fundamental tools
Model organisms provide the raw materials for study. List three organisms (or organismic groups) often used by recombinant DNA technologists and describe a major advantage of each group.
The smallest free-living microbes are (mycobacteria/mycoplasmas/Chlamydophila)
What will be an ideal response?