AQA A-Level Biology Latest Questions
And Verified Answers||Download Now||
polymer -CORRECT ANSWER long molecules formed from combinations of many
monomers joined together
condensation reaction -CORRECT ANSWER a chemical reaction in which two or more
molecules join and produces one water molecule
hydrolysis reaction -CORRECT ANSWER A chemical reaction that breaks apart a
larger molecule by adding a molecule of water
isomers -CORRECT ANSWER Compounds with the same chemical formulae but
different structures.
carbohydrates -CORRECT ANSWER compounds made from carbon, hydrogen and
oxygen (monosaccharides, disaccharides and polysaccharides), important energy store
monosaccharide -CORRECT ANSWER simple sugars (glucose, fructose, galactose)
disaccharide -CORRECT ANSWER two monosaccharides joined together by a
glycosidic bond
polysaccharide -CORRECT ANSWER many sugar units joined by a glycosidic bond
maltose -CORRECT ANSWER α glucose + α glucose
lactose -CORRECT ANSWER glucose + galactose
sucrose -CORRECT ANSWER glucose + fructose
where is lactose found? -CORRECT ANSWER milk
where is maltose found? -CORRECT ANSWER germinating seeds
where is sucrose found? -CORRECT ANSWER table sugar
cellulose -CORRECT ANSWER polymer of β glucose
starch -CORRECT ANSWER polymer of α glucose (amylose + amylopectin)
what is the structure of cellulose? -CORRECT ANSWER long, unbranched chains of β
glucose, insoluble
, where is cellulose found? -CORRECT ANSWER plant cell walls
why is cellulose strong? -CORRECT ANSWER chains linked by h bonds form
microfibrils giving high tensile strength to prevent osmotic lysis
what is the structure of starch? -CORRECT ANSWER long, highly-branched, compact
helix and insluble
where is starch found? -CORRECT ANSWER energy stores in plants
glycogen -CORRECT ANSWER storage form of glucose in animals, compact, highly-
branched structure
limits of the Benedict's test -CORRECT ANSWER isn't specific or sensitive
what is the test for reducing sugars? -CORRECT ANSWER Benedict's test
what colour will the solution be in the presence of reducing sugars? -CORRECT
ANSWER green → red (nearer red, higher conc reducing sugar)
what is the test for starch? -CORRECT ANSWER iodine test
if starch is present, what colour will the iodine be? -CORRECT ANSWER orange →
blue-black
covalent bond -CORRECT ANSWER a chemical bond in which two atoms share a pair
of electrons
ionic bond -CORRECT ANSWER the bond between two oppositely charged ions
hydrogen bond -CORRECT ANSWER the attraction between a partially positive
hydrogen atom(δ+) and a partially negative atom(δ-)
lipid -CORRECT ANSWER compounds mostly made from carbon and hydrogen
(triglycerides and phospholipids), energy store, thermal insulator, for buoyancy and
protection
triglyceride -CORRECT ANSWER 1 glycerol + 3 fatty acid tails joined by an ester bond
glycerol -CORRECT ANSWER a three-carbon alcohol with a hydroxyl group(-OH)
attached to each
fatty acid -CORRECT ANSWER a carboxylic acid made of a hydrocarbon chain + a
terminal carboxyl group
And Verified Answers||Download Now||
polymer -CORRECT ANSWER long molecules formed from combinations of many
monomers joined together
condensation reaction -CORRECT ANSWER a chemical reaction in which two or more
molecules join and produces one water molecule
hydrolysis reaction -CORRECT ANSWER A chemical reaction that breaks apart a
larger molecule by adding a molecule of water
isomers -CORRECT ANSWER Compounds with the same chemical formulae but
different structures.
carbohydrates -CORRECT ANSWER compounds made from carbon, hydrogen and
oxygen (monosaccharides, disaccharides and polysaccharides), important energy store
monosaccharide -CORRECT ANSWER simple sugars (glucose, fructose, galactose)
disaccharide -CORRECT ANSWER two monosaccharides joined together by a
glycosidic bond
polysaccharide -CORRECT ANSWER many sugar units joined by a glycosidic bond
maltose -CORRECT ANSWER α glucose + α glucose
lactose -CORRECT ANSWER glucose + galactose
sucrose -CORRECT ANSWER glucose + fructose
where is lactose found? -CORRECT ANSWER milk
where is maltose found? -CORRECT ANSWER germinating seeds
where is sucrose found? -CORRECT ANSWER table sugar
cellulose -CORRECT ANSWER polymer of β glucose
starch -CORRECT ANSWER polymer of α glucose (amylose + amylopectin)
what is the structure of cellulose? -CORRECT ANSWER long, unbranched chains of β
glucose, insoluble
, where is cellulose found? -CORRECT ANSWER plant cell walls
why is cellulose strong? -CORRECT ANSWER chains linked by h bonds form
microfibrils giving high tensile strength to prevent osmotic lysis
what is the structure of starch? -CORRECT ANSWER long, highly-branched, compact
helix and insluble
where is starch found? -CORRECT ANSWER energy stores in plants
glycogen -CORRECT ANSWER storage form of glucose in animals, compact, highly-
branched structure
limits of the Benedict's test -CORRECT ANSWER isn't specific or sensitive
what is the test for reducing sugars? -CORRECT ANSWER Benedict's test
what colour will the solution be in the presence of reducing sugars? -CORRECT
ANSWER green → red (nearer red, higher conc reducing sugar)
what is the test for starch? -CORRECT ANSWER iodine test
if starch is present, what colour will the iodine be? -CORRECT ANSWER orange →
blue-black
covalent bond -CORRECT ANSWER a chemical bond in which two atoms share a pair
of electrons
ionic bond -CORRECT ANSWER the bond between two oppositely charged ions
hydrogen bond -CORRECT ANSWER the attraction between a partially positive
hydrogen atom(δ+) and a partially negative atom(δ-)
lipid -CORRECT ANSWER compounds mostly made from carbon and hydrogen
(triglycerides and phospholipids), energy store, thermal insulator, for buoyancy and
protection
triglyceride -CORRECT ANSWER 1 glycerol + 3 fatty acid tails joined by an ester bond
glycerol -CORRECT ANSWER a three-carbon alcohol with a hydroxyl group(-OH)
attached to each
fatty acid -CORRECT ANSWER a carboxylic acid made of a hydrocarbon chain + a
terminal carboxyl group
