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S_A_V [24]
3 years ago
13

A scientist notices that when she adds a small, water-soluble molecule to a dish of cells, the cells turn off transcription of a

gene. She hypothesizes that the ligand she added binds to a(n) ______ receptor. Intracellular Hormone Enzyme-linked Gated ion channel-linked
Biology
1 answer:
Lelechka [254]3 years ago
7 0

Answer:

Enzyme-linked

Explanation:

The cell surface receptors that have intracellular domains associated with enzymes are called enzyme-linked receptors. The added molecule was water-soluble and cannot pass through the membrane to bind to intracellular receptors. Binding of the added molecule to the enzyme-linked receptor led to the activation of associated enzymes to generate the response (down-regulation of expression of the target gene).

Examples of enzyme-linked receptors include tyrosine kinase receptors. Binding of the signaling molecule to these receptors triggers phosphorylation of the intracellular domain which in turn transmits the signal to the cytoplasmic messenger.

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