Summary Ch1 Biological Molecules notes A* AQA A Level Biology
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Course
Unit 1 - Biological molecules
Institution
AQA
Book
AQA Biology A Level Student Book
A set of thorough and concise notes created and used by an A* grade student to revise Biological Molecules (ch 1 of the A Level AQA Biology course). The notes are detailed and clearly explain the topic by breaking each process down into steps. It includes clear and detailed diagrams and includes al...
,Bonding
• Sharing of electron pairs between atoms.
• Covalent bonds • Forms a strong covalent bond with weak intermolecular forces.
• Transfer of electrons.
• Ionic bonds • Negative ions and positive ions attract (like charges)
• Weak bond but strong intermolecular charge.
• Uneven distribution of an electron pair in a covalent bond.
• Hydrogen bonds • Creates a polar material
• One atom is more positive and one is more negative
, Hydrogen bonding
• The O is more negative than the H as
electron pair is close to O
• This makes it 𝛿- and the H 𝛿+.
• Due to the charged atoms, the H from
other molecules is attracted to the O by a
hydrogen bond.
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