Which of the following enzymes unwind and open the DNA double helix at the start of DNA replication?
a. DNA Polymerase
b. Telomerase
c. Helicase
d. DNA Ligase
c. Helicase
Helicase unwinds and opens up the DNA double helix at the start of DNA replication.
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________ pathways are those that function both catabolically and anabolically.
Fill in the blank(s) with the appropriate word(s).
What is the source of the envelope in enveloped-viruses?
What will be an ideal response?
Mitosis can occur during any phase of the cell cycle.
a. true b. false
Previous experiments have not conclusively demonstrated XFF is the alien epinephrine, so you decide to investigate other XFF properties using radioactive XFF. Which of the following XFF behaviors confirm that XFF is similar to estrogen?
A) XFF binds only to the cell surface. B) XFF diffuses into the cell cytoplasm. C) XFF is internalized by receptor-mediated endocytosis. D) Ryanodine blocks the interaction of XFF with cells. E) Opioids block the interaction of XFF with cells.