During DNA replication, which enzyme removes the RNA primers and then fills in the gap?
A. DNA pol I
B. DNA primase
C. DNA pol III
D. DNA ligase
A. DNA pol I
You might also like to view...
Oxygen (O2) makes up about 21% of the Earth's atmosphere. The graph below depicts changes in atmospheric O2 levels measured between the years 1990 and 2008. The burning of fossil fuels produces CO2, removing O2 from the atmosphere
It has been estimated that approximately three molecules of O2 are consumed by every single molecule of CO2 produced by fossil fuel combustion. Over about 20 years, a total loss of 0.0317% O2 from the atmosphere was calculated from this data. If you compare this graph to that shown in Figure 25.1, how is the trend in O2 levels related to the trend in CO2 levels? A. Both O2 levels and CO2 levels increase over time. B. Both O2 levels and CO2 levels decrease over time. C. O2 levels decrease as CO2 levels increase. D. O2 levels increase as CO2 levels decrease.
In four-o'clock plants, red flower color is dominant to white flower color. However, heterozygous plants have a pink color. If a pink-flowered plant is crossed with a white-flowered plant, what will be the phenotypic ratios of their offspring?
A. ¼ red, ½ pink, ¼ white B. All pink C. All white D. ½ pink, ½ white E. ½ red, ½ pink
If one parent has blood type A and the other parent has blood type B, then which of the following blood types is
possible in the children? a. AB only b. A and AB only c. B and AB only d. A, B, AB, and O e. O only
In his comprehensive theory, Steve Hubbell assumes that all species are competitively equivalent and that they have identical fitnesses— their probabilities of death and reproduction are the same. How do we characterize such species (and, indeed, Hubbell's theory)?
A) polarized B) neutral C) niche-differentiated D) complementary