EDEXCEL A LEVEL BIOLOGY B (9BI0) QUESTION
PAPER 1 + MARK SCHEME SUMMER 2026
monosaccharides - //correct answer//single simple sugar molecule
disaccharides - //correct answer//sugar made up off two monosaccharide units joined by
a glycosidic bond formed in a condensation reaction
polysaccharides - //correct answer//polymer made up of long chains of monosaccharide
units joined by glycosidic bonds
condensation reaction - //correct answer//reaction in which a molecule of water is
removed from the reacting molecules as a bond is formed between them
glycosidic bond - //correct answer//covalent bond formed in a condensation reaction
anion - //correct answer//negative ion formed when an atom gains an electron
cation - //correct answer//positive ion formed when an atom loses an electron
ionic bonds - //correct answer//attractive forces between oppositely charged ions
covalent bonds - //correct answer//formed when atoms share electrons
dipole - //correct answer//separation of charge in a molecule when the electrons in a
covalent bond are not evenly shared
polar molecule - //correct answer//molecule containing a dipole
, hydrogen bonds - //correct answer//weak electrostatic intermolecular bonds formed
between polar molecules containing at least one hydrogen atom
monomer - //correct answer//small molecule that is a single unit of a larger molecule
called a polymer
polymer - //correct answer//long chain molecule made up of many smaller repeating
monomer units joined together by chemical bonds
macromolecule - //correct answer//very large molecule formed by polymerisation
starch - //correct answer//energy store in plants made of amylose and amylopectin.
Insoluble and compact and can be broken down rapidly to release glucose
sucrose - //correct answer//sweet tasting disaccharide formed by the joining of a
glucose and fructose by a glycosidic bond
glucose - //correct answer//hexose sugar
triose sugar - //correct answer//sugar with 3 carbon atoms and important in mitochondria
pentose sugar - //correct answer//sugar with 5 carbon atoms and important in nucleic
acid
ribose - //correct answer//pentose sugar that makes up part of the structure of RNA
deoxyribose - //correct answer//pentose sugar that makes up part of the structure of
DNA
deoxyribonucleic acid - //correct answer//nucleic acid that acts as the genetic material in
many organisms
ribonucleic acid - //correct answer//nucleic acid which can act as the genetic material in
some organisms and is involved in protein synthesis
hexose sugar - //correct answer//sugar with 6 carbon atoms and taste sweet
isomers - //correct answer//molecules that have the same chemical formula, but
different molecular structures
nitrate ions (NO3)- - //correct answer//needed in plants for formation of amino acids and
DNA
phosphate ions (PO4)3- - //correct answer//forms ATP, ADP, DNA and RNA
PAPER 1 + MARK SCHEME SUMMER 2026
monosaccharides - //correct answer//single simple sugar molecule
disaccharides - //correct answer//sugar made up off two monosaccharide units joined by
a glycosidic bond formed in a condensation reaction
polysaccharides - //correct answer//polymer made up of long chains of monosaccharide
units joined by glycosidic bonds
condensation reaction - //correct answer//reaction in which a molecule of water is
removed from the reacting molecules as a bond is formed between them
glycosidic bond - //correct answer//covalent bond formed in a condensation reaction
anion - //correct answer//negative ion formed when an atom gains an electron
cation - //correct answer//positive ion formed when an atom loses an electron
ionic bonds - //correct answer//attractive forces between oppositely charged ions
covalent bonds - //correct answer//formed when atoms share electrons
dipole - //correct answer//separation of charge in a molecule when the electrons in a
covalent bond are not evenly shared
polar molecule - //correct answer//molecule containing a dipole
, hydrogen bonds - //correct answer//weak electrostatic intermolecular bonds formed
between polar molecules containing at least one hydrogen atom
monomer - //correct answer//small molecule that is a single unit of a larger molecule
called a polymer
polymer - //correct answer//long chain molecule made up of many smaller repeating
monomer units joined together by chemical bonds
macromolecule - //correct answer//very large molecule formed by polymerisation
starch - //correct answer//energy store in plants made of amylose and amylopectin.
Insoluble and compact and can be broken down rapidly to release glucose
sucrose - //correct answer//sweet tasting disaccharide formed by the joining of a
glucose and fructose by a glycosidic bond
glucose - //correct answer//hexose sugar
triose sugar - //correct answer//sugar with 3 carbon atoms and important in mitochondria
pentose sugar - //correct answer//sugar with 5 carbon atoms and important in nucleic
acid
ribose - //correct answer//pentose sugar that makes up part of the structure of RNA
deoxyribose - //correct answer//pentose sugar that makes up part of the structure of
DNA
deoxyribonucleic acid - //correct answer//nucleic acid that acts as the genetic material in
many organisms
ribonucleic acid - //correct answer//nucleic acid which can act as the genetic material in
some organisms and is involved in protein synthesis
hexose sugar - //correct answer//sugar with 6 carbon atoms and taste sweet
isomers - //correct answer//molecules that have the same chemical formula, but
different molecular structures
nitrate ions (NO3)- - //correct answer//needed in plants for formation of amino acids and
DNA
phosphate ions (PO4)3- - //correct answer//forms ATP, ADP, DNA and RNA
