Some nuclear receptor proteins may be activated by intracellular metabolites rather than by secreted signal molecules.
正确
举一反三
- How a cell reacts to a signal depends on the set of intracellular signaling molecules each cell-surface receptor produces and how these molecules alter the activity of effector proteins, which have a direct effect on the behavior of the target cell.
- Amplification results when an enzyme associated with a signal receptor is activated and, in turn, catalyzes the activation of many molecules of a second enzyme, each of which activates many molecules of a third enzyme, and so on, in a so-called _____________________.
- Small molecules which are responsible for intracellular signal<br/>transduction are called( ) A: receptor B: vetor C: transmitter D: first messenger E: second<br/>messenger
- Communication between cells is mediated by cell signaling molecules and ( ). A: Cell receptor B: Antibody C: Enzyme D: Electric signal
- The intracellular small molecules which can transmit extracellular signal is called ( ) A: first messenger B: carrier C: second messenger D: transmitter E: third messenger
内容
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Samuel likes doing some reading at home ________ to the cinema. A: than to go B: than going C: rather than going D: rather than to go
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Which of the following cell signaling molecules does the neurotransmitter belong to? ( ) A: Chemical signal B: Gas molecules C: Optical signal D: Electric signal
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Some lazy men would rather _______ than work.
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Nuclear localization signal]
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It is said in some parts of the world， goats， rather than cows， serve as a vital _______ of milk.