Gliding motility can be used to propel bacteria ________.
A. along the framework of the cytoskeleton of host cells
B. through the air only
C. through liquids only
D. across solid substrates only
Answer: D
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A gene that normally has the sequence CAGAGCCTATTAGGC is replicated as CAGAGCTGACGAGGC. Which of the following repair mechanisms would most likely be employed to fix this replication error?
A. base excision repair B. nucleotide excision repair C. base excision repair and/or nucleotide excision repair D. DNA polymerase proofreading E. None of the answer options is correct.
Which of the following respiratory control centers allows you to hold your breath before diving into a
swimming pool?
a. aortic bodies b. carotid bodies c. receptors of the medulla d. the limbic center of the brain e. higher brain centers of the cerebrum
What results from an unequal sharing of electrons between atoms?
A) a nonpolar covalent bond B) a polar covalent bond C) an ionic bond D) a hydrophobic interaction
The Gulf Stream is part of what scientists call the "great conveyor belt" that circulates water throughout the world's oceans. There is cause for concern that the increase in global warming might stop the conveyor belt
Would this scenario change Europe's climate? A) Yes: The Gulf Stream brings cold water from the arctic to Europe. Without this, Europe's climate is expected to be much warmer. B) Yes: The Gulf Stream brings warm water from the tropics to Europe. Without this, Europe's climate is expected to be much cooler. C) No: The climate of Europe is unaffected by ocean currents. D) No: There are other currents that will take over if the Gulf Stream stops functioning.