You Fluorescently Label the Phospholipid Head Groups of a Small

question 14

Multiple Choice

You fluorescently label the phospholipid head groups of a small number of phospholipids in the outer leaflet of the cell membrane to observe them over time with a microscope.At time zero,all the fluorescent label is concentrated in one spot.What will you observe at a later time point?

• A) The fluorescently tagged phospholipids will still be together, concentrated in a spot.
• B) The fluorescently tagged phospholipids will be spread out, but will still all be part of the outer leaflet.
• C) The fluorescently tagged phospholipids will be spread out in the outer leaflet and some will have flip-flopped into the inner leaflet as well.
• D) It is impossible to predict what will happen to the labeled phospholipids over time.

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Definitions:

Sex Differences

Variations between males and females that can be biological or psychological, influencing physiology, behavior, and cognitive functions.

Cognition

Act or process of knowing or coming to know; in psychology, refers to thought processes; in behavioral neuroscience, refers to identification and planned response to stimuli.

Left Parietal Lobe

An area of the brain that plays a key role in processing sensory information from various parts of the body, spatial orientation, and navigation.

Right Parietal Lobe

An area of the brain that processes sensory information regarding the spatial orientation, navigation, and manipulation of objects.