You Collect a Protist from a Rotting Log and Grow

question 34

Multiple Choice

You collect a protist from a rotting log and grow it in a petri dish containing E.coli,which it engulfs.For a while the protists multiply as single cells.Then the E.coli run short,and the protists aggregate to form a clump,which rises up to become a stalked structure with a globular head.What kind of protist have you got?

• A)a water mold
• B)a free- living amoeba
• C)a plasmodial slime mold
• D)a cellular slime mold

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Definitions:

Serotonin

A neurotransmitter of the biogenic amine group; important in mood and helps regulate the sleep–wake cycle.

Dopamine

A neurotransmitter of the biogenic amine group; important in motor function.

cAMP Signal Transduction

A cellular signaling pathway involving the secondary messenger cyclic AMP (cAMP) which mediates a variety of physiological responses.

Adenylyl Cyclase

Enzyme responsible for catalyzing the conversion of ATP to cyclic AMP (cAMP).