Which Statement About Signal Transduction in Cells Can Be Used

question 40

Multiple Choice

Which statement about signal transduction in cells can be used to explain how specificity is achieved in a signal transduction pathway?

• A) Receptors that bind chemical signals are either membrane receptors located on the cell surface or internal receptors present in the interior of a cell.
• B) The sensitivity of a cell to a chemical signal is determined in part by the affinity of the cell's receptors for the signal molecule.
• C) The binding of a small molecule to a site on a receptor is reversible, and equilibrium is reached when the rate of binding equals the rate of dissociation.
• D) Agonists are chemicals that bind to a receptor and stimulate a signal transduction pathway just as the natural ligand does.
• E) A receptor protein changes its conformation only when its binding site is occupied by a small molecule with a shape complementary to the site.

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Definitions:

Brain Differences

Variations in the structure, function, or chemistry of the brain among individuals or groups, often studied in the context of understanding behavior, abilities, and neurological conditions.

Behavior

The way in which one acts or conducts oneself, especially towards others, governed by psychological and environmental factors.

Brain Hemisphere

One half of the brain, either the left or the right, each responsible for different functions and cognitive processes.

Visual Field

The total area in which objects can be seen in the peripheral vision while the eye is focused on a central point.