Using Time-Lapse Fluorescence Microscopy, You Have Recorded the Transport of Fluorescently

question 16

Multiple Choice

Using time-lapse fluorescence microscopy, you have recorded the transport of fluorescently labeled mitochondria in a region of an axon in a fruit-fly larva; you have plotted the results in the following graph, in which the vertical axis is time (from the top to the bottom) , the horizontal axis is the position along the axon, and each trace represents one mitochondrion. Is the retrograde transport or the anterograde transport of mitochondria faster in these axons? Does the trace indicated by an asterisk correspond to a mitochondrion that was transported by a dynein or a kinesin?

• A) Anterograde; kinesin
• B) Anterograde; dynein
• C) Retrograde; kinesin
• D) Retrograde; dynein

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Definitions:

Shortage/Surplus

Shortage occurs when demand exceeds supply, while surplus occurs when supply exceeds demand.

Quantity Demanded

The total amount of a good or service that consumers are willing and able to purchase at a given price level in a market.

Quantity Supplied

The quantity of a product or service suppliers are prepared to offer for sale at a specific price.

Price Ceiling

A government-imposed limit on how high a price can be charged on a product, aiming to keep essential goods affordable.