In the reproductive cycle of a fern, a zygote develops into
a. sperm and egg.
b. spores.
c. a young gametophyte.
d. a young sporophyte.
D
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What structure is large enough to be seen through a light microscope?
a. Proteins b. Lipids c. Eukaryotic cells d. Viruses e. DNA
Proton motive force
A. is used to synthesize ATP. B. is used to drive flagella rotation. C. is used to produce NADH. D. is used to produce FADH2. E. is used to synthesize ATP AND is used to drive flagella rotation.
The arrival of an action potential at a synaptic terminal causes voltage-gated potassium channels to
open. ____________________ Indicate whether the statement is true or false.
A phosphatase is capable of dephosphorylating molecules. What would this enzyme do in a signal transduction pathway that used a kinase cascade?
A. Serve as a ligand for the receptor. B. Activate the cascade. C. Turn off the cascade. D. Phosphorylate a receptor. E. Phosphorylate a transcription factor.