The Enzyme Α Kinase Adds __________ To Proteins.

Question: Lipid-soluble hormones:

Answer: diffuse through the cell membrane.

Question: Once inside the cell, lipid-soluble hormones can:

Answer: bind with a specific receptor molecule inside the cytoplasm or nucleus.

Question: Within the nucleus:

Answer: the receptor-hormone complex binds with a DNA molecule to produce a mRNA molecule.

Question: The ultimate cellular response to a lipid-soluble hormone is the production of proteins.

Answer: true

Question: The mRNA molecule moves from the cytoplasm to the nucleus and binds to a ribosome where it directs the synthesis of specific proteins.

Answer: false

Question: Binding of a first messenger to its receptor triggers a conformational change of the membrane-bound receptor, which ultimately leads to the cell’s response.

Answer: false

Question: First messengers that activate membrane-bound receptors are hydrophobic.

Answer: true

Question: The function of the G protein complex is:

Answer: to dissociate from the activated messenger-receptor complex in order to activate a membrane-bound effector protein.

Question: After a docking protein becomes phosphorylated, it:

Answer: binds and activates other intracellular proteins, which in turn activate one or more signaling pathways within the cell.

Question: When a first messenger binds to and activates a membrane-bound receptor that contains an ion channel:

Answer: there is a change in membrane potential and/or cytosolic calcium.