Which of the following is true of both starch and cellulose?
A) They can both be digested by humans.
B) They are both structural components of the plant cell wall.
C) They are geometric isomers of each other.
D) They are both polymers of glucose.
E) They are both used for energy storage in plants.
Answer: D) They are both polymers of glucose.
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A common feature of action potentials is that they _____
A) cause the membrane to hyperpolarize and then depolarize B) can undergo temporal and spatial summation C) are triggered by a depolarization that reaches the threshold D) move at the same speed along all axons E) require the diffusion of Na+ and K+ through ligand-gated channels to propagate
Letter ____ can indicate a fruit or developing root cells
a. A b. B c. C d. D e. E
Chloroplasts differ from mitochondria in that the former have
A) DNA. B) two lipid bilayers. C) 70S ribosomes. D) thylakoids. E) cristae.
Photosynthesis begins when
What will be an ideal response?