Photorespiration in chloroplasts resembles cellular respiration in mitochondria in that ____
A. carbon dioxide is produced in both
pathways
B. NADH is used in both pathways as the
source of high energy electrons
C. they both store energy in the form of ATP
D. both pathways are beneficial to the cell
A
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How can freeze-fracture be used to determine the orientation of a protein in a membrane?
A. Freeze-fracture allows a cell to be cleaved in between the lipid bilayer, splitting the plasma membrane into two layers. B. Freeze-fracture allows a cell to be cleaved in such a way as to preserve the embedded proteins. C. Freeze-fracture cuts the membrane in protein-sized components for viewing under an electron microscope.
The neuromast cells are part of the system to
a. process light. b. sense electrical currents in the water. c. control balance. d. detect vibrations. e. detect dissolved chemicals.
Which portion of the brain is not protected by the blood-brain barrier?
a. pons b. cerebellum c. thalamus d. cerebrum e. hypothalamus
When food is abundant, the cellular slime mold secretes cAMP into the environment to signal the formation of a
multicellular slug-shaped colony. __________________ Indicate whether the statement is true or false.