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5 terms

Biology Midterm Study Guide pt 1

Pt 1 Atoms and Isotopes
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Protons
positive charge, in nucleus, mass = 1
Neutrons
no charge, in nucleus, mass = 1
Electrons
negative charge, in electron shell around nucleus, mass = 0
What are enzymes?
Proteins that speed up chemical reactions
which element is a component of all living things?
Carbon