TOPIC 1-A LEVEL EDEXCEL BIOLOGY B EXAM COMPLETE WITH DETAILED VERIFIED ANSWERS (100% CORRECT ANSWERS) / ALREADY GRADED A+
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Module
Biology Edexcel B
Institution
Biology Edexcel B
monosaccharides - ANS single simple sugar molecule
disaccharides - ANS sugar made up off two monosaccharide units joined by a glycosidic bond formed in a condensation reaction
polysaccharides - ANS polymer made up of long chains of monosaccharide units joined by glycosidic bonds
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EDEXCEL BIOLOGY B
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EXAM COMPLETE
WITH DETAILED
YC
VERIFIED ANSWERS
D
(100% CORRECT
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ANSWERS) / ALREADY
ST
GRADED A+
, monosaccharides - ANS single simple sugar molecule
disaccharides - ANS sugar made up off two monosaccharide units joined by a glycosidic bond
formed in a condensation reaction
polysaccharides - ANS polymer made up of long chains of monosaccharide units joined by
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glycosidic bonds
condensation reaction - ANS reaction in which a molecule of water is removed from the
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reacting molecules as a bond is formed between them
glycosidic bond - ANS covalent bond formed in a condensation reaction
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anion - ANS
cation - ANS
negative ion formed when an atom gains an electron
positive ion formed when an atom loses an electron
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ionic bonds - ANS attractive forces between oppositely charged ions
covalent bonds - ANS formed when atoms share electrons
dipole - ANS separation of charge in a molecule when the electrons in a covalent bond are
not evenly shared
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polar molecule - ANS molecule containing a dipole
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hydrogen bonds - ANS weak electrostatic intermolecular bonds formed between polar
molecules containing at least one hydrogen atom
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monomer - ANS small molecule that is a single unit of a larger molecule called a polymer
polymer - ANS long chain molecule made up of many smaller repeating monomer units joined
together by chemical bonds
macromolecule - ANS very large molecule formed by polymerisation
starch - ANS energy store in plants made of amylose and amylopectin. Insoluble and
compact and can be broken down rapidly to release glucose
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