Cell Communication and Cell Cycle
Which of the following scenarios best illustrates a keystone species' effect on maintaining biodiversity in an ecosystem?
What change occurs in a signaling receptor when a ligand binds to it?
Which is the enzyme that removes phosphate groups from proteins?
During this part of cell signaling, a message is relayed through a series of chemical changes that lead to the particular response.
How would the absence of a specific phosphatase affect a signal transduction pathway that relies on phosphorylation?
Secondary messengers are small molecules used within signal transduction to help amplify the signal and coordinate the signaling pathway within the cytoplasm. These are two examples of secondary messengers used in many cell types:
Which outcome is least likely upon activation of apoptosis through an extracellular death-signaling ligand?
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How would a population of organisms likely be affected if a mutation resulted in a beneficial allele that significantly increased reproductive success?
How would the inhibition of a G protein-coupled receptor likely affect the concentration of cyclic AMP (cAMP) in a cell?
Which adaptation would be least beneficial for a plant in a low-light forest understory environment where signal transduction pathways for light detection are crucial?