Tubulin is to microtubules as ________ is to microfilaments.
What will be an ideal response?
actin
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Which of the following is common to both extracellular and intracellular digestion?
A. the ability to phagocytose food particles B. a slow speed of digestion C. the presence of a digestive cavity D. the ability to consume both large and small food items E. None of these characteristics are common to both extra- and intracellular digestion.
You lead a research team challenged with the task of creating a regulatory protein able to shut off transcription of a particular gene. You focus your design around a binding site called an operator that is associated with the promotor. The physical location of the operator most likely to affect transcription would be
A. downstream of the gene promoter. B. internal to the gene itself. C. upstream of the gene promoter. D. internal to the gene promoter.
Early land plants required adaptations that
A) helped support the plant. B) aided reproduction. C) decreased water loss. D) all of the above. E) none of the above.
After glycolysis but before the citric acid cycle
A) pyruvate is oxidized. B) a carbon atom is added to pyruvate to make a four-carbon compound. C) coenzyme A is cleaved off pyruvate. D) glucose is split, producing two molecules of pyruvate.