Why Are Two-Component Regulatory Systems Particularly Useful for Controlling Gene

question 16

Multiple Choice

Why are two-component regulatory systems particularly useful for controlling gene expression in response to environmental signals?

• A) Two proteins controlling a gene means there are two chances to activate a gene.
• B) Two proteins delay the response time so the cell can be sure the change is permanent.
• C) One of the two proteins can be exposed to the external environment to receive a signal.
• D) Phosphorylation is a permanent change so genes are always turned on after signal.

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Definitions:

Sample Standard Deviation

A measure of the amount of variation or dispersion of a set of sample values from their sample mean.

Chi-squared Test Statistic

A measure used in statistics to determine the significance of the differences between categorical variables.

Normal Distribution

A bell-shaped distribution characterized by its mean and standard deviation, showing how data points are dispersed or spread out.

Chi-squared Probability Distribution

A distribution that represents the distribution of the sum of the squares of variables that are independent and normally distributed.