Problem:
Question 1: The mechanisms for muscle contraction involves the
a. Sliding of myosin along actin filaments
b. Sliding of tropomyosin along actin filaments
c. Shortening of actin filaments
d. Shortenening of the A band
Question 2: Interphase cell microtubules nucleate from
a. Centrioles
b. Centromeres
c. Basal bodies
d. other (explain)
Question 3: Which type of intermediate filament is found in all animal cells?
a. Keratins
b. Nuclear lamins
c. Neural filaments
d. other (explain)
Please select correct answer and also provide explaination.