Based on the graph, how soon could another action potential be easily initiated (at the end of the relative refractory period) after the first stimulus?
A) less than 0.5 msec
B) 1 msec
C) 2 msec
D) 3 msec
E) 4 msec
Answer: D
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Embryonic cell cycles allow the rapid division of cells in the early embryo. These mitotic cell cycles are much shorter in length than the mitotic cell cycles of cells in a mature organism. In the embryonic cell cycles, mitosis takes approximately the same amount of time as it does in the cell cycles of mature cells. What do you think is a result of the embryonic cycle? 32. Following S phase, a human cell would have how many pairs of sister chromatids and individual DNA molecules?
A. 23 pairs of sister chromatids and 46 individual DNA molecules B. 23 pairs of sister chromatids and 92 individual DNA molecules C. 46 pairs of sister chromatids and 46 individual DNA molecules D. 46 pairs of sister chromatids and 92 individual DNA molecules E. 46 pairs of sister chromatids and 184 individual DNA molecules Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about sister chromatids? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A competitive inhibitor
A) binds at a site other than the active site. B) irreversibly binds and inactivates the enzyme. C) cannot be processed by the enzyme. D) does not inhibit enzyme activity but does lower substrate concentration. E) binds to and inactivates the substrate.
For fertilization to occur in humans, the sperm cells have a long journey to complete before reaching an egg. If a sperm reaches an egg, fertilization is still not complete. What events must happen for fertilization to be complete?
What will be an ideal response?
Gene regulation in eukaryotes is _______ complex than in prokaryotes
Fill in the blank(s) with the appropriate word(s).