1. If tropomyosin were suddenly removed from a cell a.Motor proteins would be un

Question

1. If tropomyosin were suddenly removed from a cell

a.Motor proteins would be unable to move along actin filaments
b.Motor proteins would not transport cargo along actin filaments
c.Microtubules would spontaneously depolymerize
d.Muscles would not be able to relax


2. If troponin were suddenly removed from a cell
Answer

a.Actin filaments would spontaneously depolymerize
b.Microtubules would get frozen in place
c.Muscle cells would not be able to relax
d.Muscle cells would not be able to contract


3. Consider a cell that is flooded with a non-hydrolyzable analog of ATP. (This is an ATP molecule that can

Explanation / Answer

1. If tropomyosin were suddenly removed from a cell Answer d.Muscles would not be able to relax. This is because there is nothing interfering with the myosin from interacting (binding) with the actin filaments. 2. If troponin were suddenly removed from a cell Answer d.Muscle cells would not be able to contract This is because even with the release of calcium there is no troponin receptor site for it to bind with which would cause a conformation change that occurs within the TROPONIN which cause to pull the TROPOMYOSIN exposing the actin binding sites which allows the myosin to bind to the actin filament in order to cause the contraction of the muscle. 3. Consider a cell that is flooded with a non-hydrolyzable analog of ATP. (This is an ATP molecule that can

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