Refer to the Figure Below Showing a Series of Events

question 63

Multiple Choice

Refer to the figure below showing a series of events in a cell. Which statement describes what is happening during the phase labeled 2 in the diagram?

• A) Chemical bond energy is expended as a vesicle membrane inserts itself into and fuses with the cell membrane.
• B) An enzyme associated with a vesicle opens a hole in the cell membrane, allowing the vesicle to fuse with it.
• C) New phospholipids are synthesized at the interface between a vesicle and the cell membrane to allow the two lipid bilayers to fuse.
• D) As a vesicle membrane contacts the cell membrane, the lipid bilayers of the two membranes merge to form one interconnected membrane.
• E) Enzymes within a vesicle digest part of the vesicle membrane to allow the remaining portion to fuse with the cell membrane.

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Definitions:

Capillary Blood

Blood that is collected from the capillaries, often used for tests requiring small amounts of blood, like glucose level tests.

Buffy Coat

The fraction of an anticoagulated blood sample that contains most of the white blood cells and platelets following density gradient centrifugation.

Centrifuged

The process of subjecting various materials or solutions to the force of a centrifuge to separate components based on density.

Reference Laboratory

A laboratory owned and operated by an organization outside the physician’s practice.