Refer to the Figure Below Showing a Signal Reception Pathway

question 188

Multiple Choice

Refer to the figure below showing a signal reception pathway. A mutant plant with an inactive form of the repressor protein (for auxin or gibberellin) is compared to a typical plant.Predict the results of this experiment.

• A) The mutant plant is a dwarf because it never transcribes growth promoting genes.
• B) The mutant plant transcribes growth promoting genes even in the absence of the relevant hormone.
• C) The mutant plant grows more branches than the control plant.
• D) The mutant plant does not respond to blue light signals.
• E) The mutant plant does not respond to red light signals.

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Definitions:

Unconditioned Stimulus

In the context of classical conditioning, a stimulus which innately and automatically induces a response without the necessity of prior education.

Spontaneous Recovery

The reappearance of a previously extinguished conditioned response after a period of rest and with no further conditioning.

Addiction

A chronic, relapsing disorder characterized by compulsive drug seeking, continued use despite harmful consequences, and long-lasting changes in the brain.

Psychological Addiction

A dependency of the mind leading to compulsive engagement in rewarding stimuli despite adverse consequences.