What is the function of tropomyosin in muscle cells?
A) Tropomyosin binds to actin molecules and brings about shortening of the muscles.
B) Tropomyosin covers the myosin binding sites on the actin filaments, preventing contraction from occurring.
C) Tropomyosin is the contractile unit of the muscle cell.
D) Tropomyosin stores calcium.
Correct Answer:
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Q2: Cnidarians, such as _, have muscle fibers.
A)clams
B)earthworms
C)jellyfish
D)sea
Q3: The cross-bridge power stroke corresponds to which
Q4: Cross-bridges form between the contractile proteins of
Q5: Curare is a poison that was used
Q6: Which letter(s) in the diagram of a
Q7: What event results from the hydrolysis of
Q8: Which letter(s) in the diagram of a
Q9: The contractile machinery of muscles is only
Q10: Which of the following is the motor
Q11: Calmodulin is involved in the regulation of:
A)skeletal
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