Unwinding the double helix to separate the parental strands requires a
A. primase.
B. DNA ligase.
C. DNA polymerase.
D. topoisomerase.
E. helicase.
Ans: E. helicase.
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Researchers study the inheritance of particular human traits by ____
a. performing breeding experiments b. crossing individuals with different phenotypes c. analyzing genealogical pedigrees d. selectively breeding certain individuals e. using artificial selection techniques
The nonprotein component of an enzyme that is firmly attached to the protein is called a(n)
A. holoenzyme. B. coenzyme. C. prosthetic group. D. apoenzyme.
The type of excretory structures characteristic of class Turbellaria are:A
protonemas. B. protonephridia. C. nephridia. D. Malpighian tubules. E. antennal organs
Within ciliates, what do the micronuclei control?
a. growth b. movement c. reproduction d. cell signaling e. growth and metabolism