Homework SourseWhich of the following statements about gene expression is t
Which of the following statements about gene expression is true?
| a) The control of gene expression is most like the control of a light using an on/off switch. |
| b) The expression of all genes is regulated in response to changing environments. |
| c) The control of gene expression is most like the control of a light using a dimmer switch. |
| d) Gene expression only needs to be controlled in bacteria. |
| e) Gene expression only needs to be controlled for a small set of genes. |
Solution
The correct answer is option C.
c) The control of gene expression is most like the control of a light using a dimmer switch.
Reason:
The expression of all genes is regulated in response to changing environments & it is most like the control of a light using a dimmer switch.
The repressor acts as off switch, while the on switch acts as the inducer, like an electric switch. If the repressor is binds to the operator gene regulatory system will be shut down, and inducer binds to the operator, gene regulation system will be activated. This is similar to on and off mechanism of light switch.
