If a DNA molecule was a spiral staircase, what would the steps of the staircase be?
a. covalent bonds
b. deoxyribose
c. base pairs
d. hydrogen bonds
e. phosphate
ANSWER: c
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What would you expect to happen if the anaphase-promoting complex/cyclosome (APC/C) failed to ubiquitinate securin?
A. The cohesin complex will be destroyed, and the cell will remain in metaphase. B. The cohesin complex will persist, preventing the cell from entering anaphase. C. Separase will be marked for degradation by securin, preventing the cell from entering anaphase. D. Securin will remain intact and therefore will degrade cohesin, allowing the cell to enter anaphase. 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 securin? 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?
Which of the following organisms is considered a primary consumer?
A. a cougar B. algae C. a grasshopper D. a toadstool E. a holly bush
Waxy coatings, such as found on skin, hair, and feathers of some animals and the cuticle of some
plants, are commonly used by living organisms for protection against water loss and for lubrication. Such waxes are considered to be a type of ____.
a. triglyceride b. steroid c. neutral lipid d. phospholipid e. fatty acid
Which is a correct relationship between soil particles and soil characteristics?
A. Clay particles hold tight to NO3- and the nitrogen content of clay soils is therefore high. B. Clay is unable to retain Ca2+ and K+ which are easily leached away. C. Sand prevents water erosion and leaching. D. Clay holds water and clumps.