AQA A-Level Biology Paper 1| Complete Questions
with Verified Answers| Graded A+ Perfect score|
Download 100%
activation energy - Correct Answer ✅💯minimum energy required for a reaction to start
active site - Correct Answer ✅💯a region on enzymes that binds to a substrate during a
reaction
allosteric site - Correct Answer ✅💯specific receptor site on an enzyme remote from the
active site
amine group - Correct Answer ✅💯-NH2
amino acid - Correct Answer ✅💯monomer of proteins
amino acid structure - Correct Answer ✅💯central carbon atom, hydrogen atom, variable
(R) group, carboxyl group (COOH) and amine group (NH2)
anabolism - Correct Answer ✅💯metabolic pathway that construct molecules, requiring
energy
anti-parallel - Correct Answer ✅💯complementary and parallel but running in opposite
directions
ATP - Correct Answer ✅💯adenosine triphosphate
universal energy currency
ATP in aerobic respiration - Correct Answer ✅💯released as free energy with 30 molecules
per glucose
bases in DNA - Correct Answer ✅💯A(adenine), T(thymine), C(cytosine), G(guanine)
carbohydrates - Correct Answer ✅💯compounds made from carbon, hydrogen and oxygen
(monosaccharides, disaccharides and polysaccharides), important energy store
carboxyl group - Correct Answer ✅💯-COOH
catabolism - Correct Answer ✅💯metabolic pathway that break down molecules, releasing
energy
cellulose - Correct Answer ✅💯polymer of β glucose
competitive inhibitor - Correct Answer ✅💯binds to the enzyme's active site in place of the
substrate, structure mimics the enzyme's substrate's
complementary base pairs - Correct Answer ✅💯hydrogen bonding between bases, A-T(2),
G-C(3)
, concentration - Correct Answer ✅💯increasing concentration will increase the rate of
reaction up to a point when there is a limiting factor so activity will plateau
condensation reaction - Correct Answer ✅💯a chemical reaction in which two or more
molecules join and produces one water molecule
conformational change - Correct Answer ✅💯alteration of the structure of a protein that
impacts on its function
covalent bond - Correct Answer ✅💯a chemical bond in which two atoms share a pair of
electrons
degenerate code - Correct Answer ✅💯64 codons, so most amino acids are coded by more
than one code
describe the biuret test - Correct Answer ✅💯add biuret reagent to the sample, turns purple
in the presence of peptitde bond ∴ protein is present; if not it stays blue.
describe the emulsion test - Correct Answer ✅💯mix with ethanol and add water, white
cloudy emulsion = lipid
dipeptide - Correct Answer ✅💯product of the condensation of two amino acids
disaccharide - Correct Answer ✅💯two monosaccharides joined together by a glycosidic
bond
disulphide bridges - Correct Answer ✅💯a strong covalent bond formed with the sulfur of
cysteine monomers
DNA - Correct Answer ✅💯deoxyribonucleic acid
enzyme - Correct Answer ✅💯protein that is a biological catalyst
enzyme-substrate complex - Correct Answer ✅💯temporary complex formed when an
enzyme binds to its substrate
factors affecting rate of reaction - Correct Answer ✅💯kinetic energy, temperature,
enzyme/substrate concentration, pH, inhibitors
fatty acid - Correct Answer ✅💯a carboxylic acid made of a hydrocarbon chain + a terminal
carboxyl group
fibrous proteins - Correct Answer ✅💯long, insoluble, structural proteins (collagen in bone,
keratin in hair, actin in muscle etc)
globular proteins - Correct Answer ✅💯spherical, water-soluble proteins (enzymes,
membrane proteins, haemoglobin, insulin etc)
glycerol - Correct Answer ✅💯a three-carbon alcohol with a hydroxyl group(-OH) attached
to each
glycogen - Correct Answer ✅💯storage form of glucose in animals, compact, highly-
branched structure
with Verified Answers| Graded A+ Perfect score|
Download 100%
activation energy - Correct Answer ✅💯minimum energy required for a reaction to start
active site - Correct Answer ✅💯a region on enzymes that binds to a substrate during a
reaction
allosteric site - Correct Answer ✅💯specific receptor site on an enzyme remote from the
active site
amine group - Correct Answer ✅💯-NH2
amino acid - Correct Answer ✅💯monomer of proteins
amino acid structure - Correct Answer ✅💯central carbon atom, hydrogen atom, variable
(R) group, carboxyl group (COOH) and amine group (NH2)
anabolism - Correct Answer ✅💯metabolic pathway that construct molecules, requiring
energy
anti-parallel - Correct Answer ✅💯complementary and parallel but running in opposite
directions
ATP - Correct Answer ✅💯adenosine triphosphate
universal energy currency
ATP in aerobic respiration - Correct Answer ✅💯released as free energy with 30 molecules
per glucose
bases in DNA - Correct Answer ✅💯A(adenine), T(thymine), C(cytosine), G(guanine)
carbohydrates - Correct Answer ✅💯compounds made from carbon, hydrogen and oxygen
(monosaccharides, disaccharides and polysaccharides), important energy store
carboxyl group - Correct Answer ✅💯-COOH
catabolism - Correct Answer ✅💯metabolic pathway that break down molecules, releasing
energy
cellulose - Correct Answer ✅💯polymer of β glucose
competitive inhibitor - Correct Answer ✅💯binds to the enzyme's active site in place of the
substrate, structure mimics the enzyme's substrate's
complementary base pairs - Correct Answer ✅💯hydrogen bonding between bases, A-T(2),
G-C(3)
, concentration - Correct Answer ✅💯increasing concentration will increase the rate of
reaction up to a point when there is a limiting factor so activity will plateau
condensation reaction - Correct Answer ✅💯a chemical reaction in which two or more
molecules join and produces one water molecule
conformational change - Correct Answer ✅💯alteration of the structure of a protein that
impacts on its function
covalent bond - Correct Answer ✅💯a chemical bond in which two atoms share a pair of
electrons
degenerate code - Correct Answer ✅💯64 codons, so most amino acids are coded by more
than one code
describe the biuret test - Correct Answer ✅💯add biuret reagent to the sample, turns purple
in the presence of peptitde bond ∴ protein is present; if not it stays blue.
describe the emulsion test - Correct Answer ✅💯mix with ethanol and add water, white
cloudy emulsion = lipid
dipeptide - Correct Answer ✅💯product of the condensation of two amino acids
disaccharide - Correct Answer ✅💯two monosaccharides joined together by a glycosidic
bond
disulphide bridges - Correct Answer ✅💯a strong covalent bond formed with the sulfur of
cysteine monomers
DNA - Correct Answer ✅💯deoxyribonucleic acid
enzyme - Correct Answer ✅💯protein that is a biological catalyst
enzyme-substrate complex - Correct Answer ✅💯temporary complex formed when an
enzyme binds to its substrate
factors affecting rate of reaction - Correct Answer ✅💯kinetic energy, temperature,
enzyme/substrate concentration, pH, inhibitors
fatty acid - Correct Answer ✅💯a carboxylic acid made of a hydrocarbon chain + a terminal
carboxyl group
fibrous proteins - Correct Answer ✅💯long, insoluble, structural proteins (collagen in bone,
keratin in hair, actin in muscle etc)
globular proteins - Correct Answer ✅💯spherical, water-soluble proteins (enzymes,
membrane proteins, haemoglobin, insulin etc)
glycerol - Correct Answer ✅💯a three-carbon alcohol with a hydroxyl group(-OH) attached
to each
glycogen - Correct Answer ✅💯storage form of glucose in animals, compact, highly-
branched structure
