Recognition sequences for restriction enzymes possess the unique quality of being the same when read 5? to 3? on either strand. What is this property called?
A) origin sequence
B) consensus sequence
C) gene sequence
D) recombination sequence
E) palindromic sequence
Answer: E
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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 scientist is researching a population of blue jays in her city. In order to completely define this blue jay population, she must:
A. determine the size, range, and density of the blue jay population. B. determine the predators and parasites of the blue jay population. C. determine the climates in which the blue jays can survive. D. determine whether the blue jays are r- or K -strategists. E. determine the typical life history for an individual blue jay.
Which of the following contributes significantly to the survival of Coxiella burnetti for long periods in the environment?
A. Protective pili B. Endospore-like structure C. Polysaccharide capsule D. Gram positive cell wall structure
In a 3-point test cross, the least common offspring phenotypes always result from the ____________
a) non-recombinant gametes b) recombinant gametes from a single cross over between the first and middle gene c) recombinant gametes from a single cross over between the middle and last gene d) gametes from double crossovers