Which one of the following enzymes catalyzes the attachment of nucleotides to a growing complementary strand?
A) restriction enzyme
B) DNA polymerase
C) plasmid
D) DNA ligases
E) transgenic
B
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Bacteria may be stored
A. on a slant in the refrigerator. B. frozen in glycerol solution. C. freeze-dried. D. in broth at 37?C. E. on a slant in the refrigerator, frozen in glycerol solution, AND freeze-dried.
Which of these factors would have the least effect on heat transfer processes in animals?
A. surface area of the body B. difference between body temperature and ambient temperature C. internal insulation such as blubber D. external insulation such as feathers or fur E. bone density
Activated G proteins ____
a. trigger endocytosis of the G-protein-coupled receptor b. bind to second messengers c. separate into two parts d. activate a kinase e. inhibit guanylyl cyclase
The small air sacs of the lungs are the
A. alveoli. B. bronchioles. C. arterioles. D. spiracles. E. uvula.