★ Macromolecules & Enzymes Quiz
What macromolecule has long-term energy, insulation, and is part of the cell membrane?
A. carbohydrate
B. lipid
C. nucleic acid
D. protein
Select your answer:

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Muscle Anatomy › ViewDuring skeletal muscle contraction, to what do myosin heads bind?
A. the H zone
B. Z discs
C. actin filaments
D. myosin filaments
Muscle System › View
What are the two classifications of muscles in your body?
A. Voluntary and Controllable
B. Flabby and Strong
C. Involuntary and Voluntary
D. Hard and soft