What is the first step in the assembly of E. coli DNA polymerase III?
a. Two core polymerases form a dimer.
b. ? dimer binds to core polymerase.
c. Core polymerase binds to ?.
d. The clamp loader unloads ? subunits from DNA.
e. The clamp loader binds ? subunits on the DNA template.
Ans: e
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Photorespiration in chloroplasts differs from cellular respiration in mitochondria in that ___
A. ATP is required for photorespiration but is a product of mitochondrial respiration B. NADH supplies high energy electrons in mitochondrial respiration, whereas RuBP supplies the electrons necessary for photorespiration. C. photorespiration supplies plant cells with ATP. Mitochondrial respiration supplies animal cells with ATP. D. carbon dioxide is produced in mitochondrial respiration, and oxygen is produced in photorespiration
The study of interactions among organisms and between organisms and their environment is known as ____
a. environmentalism b. demography c. ecology d. biogeography e. paleontology
Marine bony fish __________ water by osmosis, while freshwater bony fish __________ water by osmosis.
Fill in the blank(s) with the appropriate word(s).
Many sponges, cnidarians, and echinoderms have few if any external characteristics distinguishing males from females. This seemingly odd structural characteristic is most likely associated with which of these functions?
A) substrate feeding B) reproducing asexually only C) reproducing by spawning (simultaneous release of gametes into the water for fertilization) D) having a gastrovascular cavity that takes up most of the internal space.