A Bacterial Growth Curve Is Presented Below

question 26

Multiple Choice

A bacterial growth curve is presented below. The curve represents ________ growth, which is caused by the ________.

• A) binary; addition of more growth media after the fulture reaches stationary phase
• B) diauxic; addition of more growth media after the fulture reaches stationary phase
• C) binary; addition of a needed vitamin after it runs out
• D) diauxic; addition of a needed vitamin after it runs out
• E) diauxic; growth on two carbon sources resulting in a lag after the preferred substrate is depleted; new genes are then induced and growth resumes

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Definitions:

Crowding

The feeling of discomfort or stress caused by a high number of individuals in a given space, leading to a perceived lack of personal space.

Density

A physical property representing mass per unit volume.

Serotonin

A neurotransmitter that plays a key role in mood regulation, appetite, sleep, and other physiological processes.

Dopamine

A neurotransmitter in the brain that plays a major role in reward-motivated behavior, movement, and cognitive functions.