In controlled experiments, researchers study a(n) ____________________ variable and compare the results to those of
the control group. Fill in the blank(s) with the appropriate word(s).
ANSWER: single
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List the stages of meiosis I and explain the events that occur during each stage.
What will be an ideal response?
Which sequence accurately describes the path traveled by a new protein from when it first starts to be translated to its release from the cell?
A) nuclear envelope ? ER ? vesicle ? Golgi ? plasma membrane ? external environment B) cytosol ? ER ? Golgi ? vesicle ? plasma membrane ? external environment C) cytosol ? Golgi ? ER ? vesicle ? plasma membrane ? external environment D) plasma membrane ? ER ? vesicle ? Golgi ? cytosol ? external environment E) nucleus ? ER ? Golgi ? vesicle ? plasma membrane ? external environment
The ATP generated from cellular respiration is not sufficient to drive the Calvin cycle in plants, even if appropriate levels of NADPH and CO2 are present. Why not?
A. Breaking down sugar to provide the energy needed to synthesize sugar would be a futile cycle. B. Plants do not undergo cellular respiration. C. Cellular respiration and photosynthesis do not happen in the same cells in plants. D. The Calvin cycle requires more ATP than can possibly be made from cellular respiration.
The phenomenon known as chemotaxis is defined as
A. the squeezing of cells through the lining of capillaries. B. the release of prostaglandins and leukotrienes in response to microbes. C. the movement of a cell toward or away from a chemical stimulus. D. the coating of a pathogen by complement. E. an increase in allergies and helminth infection.