#39: Which observation suggested to Sutherland the involvement of a second messenger in epinephrineโs effect on liver cells?
Glycogen breakdown was observed only when epinephrine was administered to intact cells.
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#18: Which part of the chlorophyll molecule is responsible for its location in the chloroplast?
The hydrophobic tail
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#37: Consider this pathway: epinephrine โ G protein-coupled receptor โ G protein โ adenylyl cyclase โ cAMP. Identify the second messenger
cAMP
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#13: Fermentation is important in organisms because it
Regenerates NAD+
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#40: Protein phosphorylation is commonly involved with all of the following except
activation of G protein-coupled receptors. (not phosphorylated, for example GDP is switched out for GTP and not phosphorylated to create GTP)
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#17: What is the oxygen released by photosynthesis a byproduct of?
Splitting water
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#6: Molecule D inhibits its own synthesis via a negative feedback pathway; which part of the pathway is it MOST LIKELY to interact with?
Enzyme 1
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#36: Lipid-soluble signaling molecules, such as aldosterone, cross the membranes of all cells but affect only target cells because
intracellular receptors are present only in target cells.
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#34: Binding of a signaling molecule to which type of receptor leads directly to a change in the distribution of substances on opposite sides of the membrane?
ligand-gated ion channel
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#10: TRUE vs FALSE: Molecule Y is an allosteric regulator of an enzyme, which means it binds to the active site of the molecule and prevents the enzymeโs ligand from binding, thereby inhibiting the enzymeโs activity.
False
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#31: Tryosine kinase receptors phosphorylate the same amino acid residues as intracellular kinases.
False
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#4: TRUE or FALSE: A cell at equilibrium is a dead cell.