If RNA was the first information storage molecule, which macromolecule would have been the "next" molecule
produced in the progression toward living cells?
a. DNA
b. lipids
c. carbohydrates
d. sugars
e. proteins
ANSWER: e
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An inhibitory postsynaptic potential (IPSP) occurs in a membrane made more permeable to _____
A) potassium ions B) sodium ions C) calcium ions D) ATP E) all neurotransmitter molecules
Plant cells typically achieve cytokinesis by:
A. binary fission. B. forming a cell plate across the middle of the cell. C. forming a cleavage furrow that pinches the cell into two. D. chromosome condensation. E. chromosome elongation.
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?
A __________ is an area where all precipitation drains into a specific waterway. Fill in the blank(s) with the appropriate word(s)