Actin Filaments Have Polarity

question 2

Multiple Choice

Actin filaments have polarity.This means that the two ends can be identified due to structural differences.The plus end is the end to which subunits are added more rapidly,or the end of polymerization.Which of the following would enable you to identify the plus end of actin filaments?

• A)Add radiolabeled actin subunits to a mixture of actin filaments in which conditions are favorable for polymerization.
• B)Add radiolabeled actin subunits to a mixture of actin filaments in which conditions favor depolymerization.
• C)Determine the ionic charge of the ends of the actin filaments.

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Definitions:

More Likely

Indicates a higher probability or chance of something occurring compared to other possibilities.

Counterconditioning

A behavior therapy procedure that uses classical conditioning to evoke new responses to stimuli that are triggering unwanted behaviors.

Conditioned Response

A learned response to a previously neutral stimulus that has become associated with an unconditioned stimulus.

Unwanted Response

A reaction, often in the context of behavior or psychology, that is not desired or intended, sometimes resulting from external stimuli or internal conflicts.