Rosalind Franklin's research contribution was essential in
a. discovering the existence of DNA.
b. establishing the principles of heredity.
c. establishing the structural features of DNA.
d. determining the nucleotide sequence of genes.
e. determining the tertiary structure of proteins.
c
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What are sinuous rilles found on the lunar surface?
a. ancient lava flows b. channels cut by flowing lava on the edge of the maria c. large basins once filled with water d. light-colored rock found in the lunar highlands e. fault lines found within the crust
A moon with a smooth, uncratered surface would imply
A) the surface is completely liquid. B) the surface is very young. C) meteorites have never struck the moon. D) the moon lies within the planet's Roche Limit. E) a strong magnetic field surrounds the moon.
The mass of a sulfur atom is 32.0 u, and the mass of a fluorine atom is 19.0 u. What is the mass of a mole of sulfur hexafluoride (SF6)?
A. 41.0 g B. 20.5 g C. 106 g D. 146 g E. 211 g
In the figure, the coefficient of kinetic friction between the surface and the larger block is 0.20, and the coefficient of kinetic friction between the surface and the smaller block is 0.30. If F = 14 N and M = 1.0 kg, what is the magnitude of the acceleration of either block?
A. 2.0 m/s2 B. 1.3 m/s2 C. 1.5 m/s2 D. 1.8 m/s2 E. 3.5 m/s2