When myosin moves along the actin, it goes through cycles of binding and releasing (duty cycle). How does myosin keep from losing its place on the actin when it releases?

A) The time of the duty cycle is large (.99) so that it is only unattached a short time.
B) The myosin is still attracted to the actin by weak electrostatic forces that prevent it from moving too far away during release.
C) The myosin is attached to the actin by another protein that it uses as a safety line to prevent it from slipping too far back.
D) The myosin is arranged in dimers so that when one releases, the other is bound.


Answer: D

Anatomy & Physiology

You might also like to view...

In an experimental situation, a rabbit is exposed to a viral antigen to which it makes antibodies. These antibodies are then purified and injected into a human with the same viral disease. This is an example of

A) innate immunity. B) active immunization. C) passive immunity. D) natural immunity. E) alloimmunity.

Anatomy & Physiology

Which structure(s) of the female reproductive system contain(s) glands that lubricate the vaginal entrance?

A) mammaries B) uterus C) gonads D) labia E) uterine tube

Anatomy & Physiology

Triglycerides are composed of

A. monosaccharides. B. amino acids. C. nucleotides. D. glycerol and fatty acids. E. None of these choices are correct.

Anatomy & Physiology

What region of the brain is concerned primarily with motivation and emotion and is extensively involved in memory?

a. limbic association area b. prefrontal cortex c. Broca's area d. Wernicke's area e. parietal association area

Anatomy & Physiology