The hexameric model of DNA unwinding proposes that:
A. DNA strands are separated prior to helicase binding.
B. one dimer is responsible for ATP hydrolysis.
C. two dimers rotate the responsibility of ATP hydrolysis.
D. three dimers rotate the responsibility of ATP hydrolysis.
E. dimer conformational changes drive ATP hydrolysis.
D
You might also like to view...
Glycogen is a polysaccharide used for energy
storage by
a. plants. b. animals. c. protists. d. bacteria. e. archaea
A planula is a
a. sedentary, attached, tree-shaped form found in corals. b. swimming larval form with an outer ciliated epidermis. c. kind of parasitic worm. d. fleshy lobe that extends laterally from the body wall of a marine worm. e. rasplike tongue.
Which of the following statements, concerning an acidic solution, is false?
A) In acidic solutions, as the concentration of hydrogen ions increases the solution becomes more acidic B) In acidic solutions, any value of the pH scale above 7 is considered acidic C) Microorganisms can grow in acidic solutions
What energy source was used by Stanley Miller in his 1953 experiment to replicate the Earth's early environment?
A. ultraviolet radiation B. sunlight C. gamma radiation D. heat E. electric spark