Examlex
Match the terms, labelled a. through d., to their descriptions. (Options may be used more than once or not at all.)
-play(s) a key role in muscle contraction
Molecule
The smallest unit of a chemical substance that still retains its chemical properties, typically made up of two or more atoms bonded together.
Outer Shell Electrons
Electrons located in the outermost shell of an atom, playing a crucial role in chemical reactions and bonding.
Semiconductor
Materials with electrical conductivity that falls between that of a conductor and an insulator, used in electronic components to control flow of current.
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