Question

Compared to the normal situation, in which actin monomers carry ATP, what do you predict would happen if actin monomers that bind a nonhydrolyzable form of ATP were incorporated into actin filaments?

A. Actin filaments would grow longer.
B. Actin filaments would grow shorter because depolymerization would be enhanced.
C. Actin filaments would grow shorter because new monomers could not be added to the filaments.
D. No change, as addition of monomers binding nonhydrolyzable ATP would not affect actin filament length.

Answer 1

The correct answer is A. Actin filaments would grow longer.

Step-by-step explanation:

If the monomers added bind nonhydrolyzable ATP, then, the interactions between each monomer will be more stable causing the filament to grow longer as it's really stable without the hydrolyzation of ATP.