Refer to the Diagram of a Sarcomere Below

question 24

Multiple Choice

Refer to the diagram of a sarcomere below.Which statement based on the diagram is true?

• A) The structure 1 consists of two chains made of monomers.
• B) The structure 1 shortens in length as contraction occurs.
• C) The structure 2 has a head that hydrolyzes ATP.
• D) The zone labeled 3 shortens in length as contraction occurs.
• E) The unit labeled 4 maintains a constant length as contraction occurs.

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