Identify a sequence that is most likely to be recognized by a restriction enzyme.
A. TCATCA
B. CGATGC
C. CCCTTT
D. TGGCCA
Answer: D
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Which one of the following is a characteristic shared by integrins and cadherins?
A. Both are peripheral membrane proteins. B. Both facilitate the adhesion of cells to extracellular matrix proteins. C. Both are present in adherens junctions, desmosomes, and hemidesmosomes. D. The cytoplasmic domains of both proteins are connected to the cytoskeleton.
Why do the photosynthetic tissues of plants look green?
What will be an ideal response?
During intense physical exercise, human cells and tissues increase their need for oxygen to provide the ATP necessary for work. Why does heart rate have to increase to meet the need for oxygen?
What will be an ideal response?
While strolling through an arboretum, a very tall tree bearing relatively small pollen-producing cones and short, needle-like leaves catches your eye. What else is also likely true of this species?
A. Its leaf surfaces are protected from desiccation by a thick waxy cuticle. B. It is a monocot. C. Its water-conducting cells are protected from desiccation by tori. D. It produces resin. E. It is pollinated by moths.