Answered: Chemotaxis is a process by which cells…

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter6: Cell Communication

Section6.4: Signal Transduction

Problem 1C: How is an extracellular signal converted to an intracellular signal in signal transduction? Give a...

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Chemotaxis is a process by which cells migrate toward higher concentrations of a signaling molecule. The signaling molecule binds cell-surface receptors that result in actin polymerization at the cell membrane. Actin polymerization results in the formulation of filamentous actin that exerts a force and leads to protrusion of the leading edge. A researcher tested Compound A on chemotaxing cells and measured the relative amount of filamentous actin found in the cells at different times.

Use the EGF Pathway passage to answer the questions.

Part B

In the model proposed, which of these events MOST likely occurs to facilitate chemotaxis?

A. Integrins anchor the cell to extracellular components.

B. Motor proteins move actin toward the leading edge.

C. Mitochondria migrate away from the leading edge.

D. Desmosomes anchor the cell to other cells.

My answer to Part B is (b) motor proteins move actin toward the leading edge. But your answer is (d). Can you please explain why B is not correct? Thanks!

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