Atom → molecule → macromolecule → supramolecular assembly
1. Which structure distinguishes an atom from a molecule?
2. What is an atom in the context of molecular biology?
3. What feature identifies ATP as a molecule that can supply energy for many metabolic reactions?
What is an atom composed of?
A nucleus of protons and neutrons surrounded by an electron cloud.
Atom - Basic unit of matter
Consists of protons, neutrons, electrons.
What is a molecule made of?
At least two atoms joined by covalent bonds and electrically neutral.
Molecule - Covalently bonded atoms
Made of at least two atoms, neutral.
What defines a cell as the unit of life?
It is a closed structure with plasma membrane, cytoplasm, and DNA, serving structural, functional, and reproductive roles.
ADN - Genetic polymer
Supports genetic info, double helix structure.
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