Glucose is transported into a cell by ____
a. active transport
b. exocytosis
c. facilitated diffusion
d. phagocytosis
e. osmosis
ANSWER: c
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Photosynthesis spread through eukaryotes by repeated endosymbiosis involving eukaryotic algae
A. true B. false
When one plant is shaded by another, why is the ratio of far-red to red light increased compared to an unshaded plant?
A. Phytochrome in the taller plant absorbs most of the red light. B. Auxin absorbs mostly far-red light. C. As light passes through the leaves of the taller plant, most of the red light is absorbed by chlorophyll. D. Far-red light mostly reflects off the surface of the soil while red light is mostly absorbed. E. Shade is enriched in far-red wavelengths of light.
Which of the following is required to detach myosin from actin?
A. calcium B. ATP C. phosphate D. troponin E. ADP
The brief reversal of the electric gradient
across a neuron’s plasma membrane is called a(an)
a. action potential. b. resting potential. c. kinetic potential. d. threshold potential. e. energy potential.