OCR A LEVEL BIOLOGY YEAR 1 EXAM QUESTIONS AND
ANSWERS LATEST DOWNLOADED 2025/2026 ALL
ANSWERS GET IT 100% CORRECT DETAILED BEST
GRADED A+ FOR SUCCESS
abiotic factors correct answers
non-living conditions in a habitat.
activation energy correct answers
the energy required to initiate a reaction.
active site correct answers
area of an enzyme with a shape complementary to a specific
substrate, allowing the enzyme to bind a substrate with
specificity.
active transport correct answers
movement of particles across a plasma membrane against a
concentration gradient. Energy is required.
adenosine diphosphate (ADP) correct answers
a nucleotide composed of a nitrogenous base (adenine), a
pentose sugar and two phosphate groups. Formed by the
hydrolysis of ATP, releasing a phosphate ion and energy.
adenosine triphosphate (ATP) correct answers
,OCR A LEVEL BIOLOGY YEAR 1 EXAM QUESTIONS AND
ANSWERS LATEST DOWNLOADED 2025/2026 ALL
ANSWERS GET IT 100% CORRECT DETAILED BEST
GRADED A+ FOR SUCCESS
a nucleotide composed of a nitrogenous base (adenine), a
pentose sugar and three phosphate groups. The universal
energy currency for cells.
Agglutinins correct answers
chemicals (antibodies) that cause pathogens to clump together
so they are easier for phagocytes to engulf and digest.
Alleles correct answers
different versions of the same gene.
amino acids correct answers
monomer used to build polypeptides and thus proteins.
anabolism (anabolic) correct answers
reactions of metabolism that construct molecules from smaller
units. These reactions require energy from the hydrolysis of ATP.
analogous structures correct answers
structures that have adapted to perform the same function but
have a different origin.
Anaphase correct answers
, OCR A LEVEL BIOLOGY YEAR 1 EXAM QUESTIONS AND
ANSWERS LATEST DOWNLOADED 2025/2026 ALL
ANSWERS GET IT 100% CORRECT DETAILED BEST
GRADED A+ FOR SUCCESS
third stage of mitosis when chromatids are separated to
opposite poles of the cell.
antibiotic-resistant bacteria correct answers
bacteria that undergo mutation to become resistant to an
antibiotic and then survive to increase in number.
Antibiotics correct answers
a chemical or compound that kills or inhibits the growth of
bacteria.
Antibodies correct answers
Y-shaped glycoproteins made by B cells of the immune system
in response to the presence of an antigen.
Antigen correct answers
identifying chemical on the surface of a cell that triggers an
immune response.
antigen−antibody complex correct answers
the complex formed when an antibody binds to an antigen.
antigen-presenting cell (APC) correct answers
ANSWERS LATEST DOWNLOADED 2025/2026 ALL
ANSWERS GET IT 100% CORRECT DETAILED BEST
GRADED A+ FOR SUCCESS
abiotic factors correct answers
non-living conditions in a habitat.
activation energy correct answers
the energy required to initiate a reaction.
active site correct answers
area of an enzyme with a shape complementary to a specific
substrate, allowing the enzyme to bind a substrate with
specificity.
active transport correct answers
movement of particles across a plasma membrane against a
concentration gradient. Energy is required.
adenosine diphosphate (ADP) correct answers
a nucleotide composed of a nitrogenous base (adenine), a
pentose sugar and two phosphate groups. Formed by the
hydrolysis of ATP, releasing a phosphate ion and energy.
adenosine triphosphate (ATP) correct answers
,OCR A LEVEL BIOLOGY YEAR 1 EXAM QUESTIONS AND
ANSWERS LATEST DOWNLOADED 2025/2026 ALL
ANSWERS GET IT 100% CORRECT DETAILED BEST
GRADED A+ FOR SUCCESS
a nucleotide composed of a nitrogenous base (adenine), a
pentose sugar and three phosphate groups. The universal
energy currency for cells.
Agglutinins correct answers
chemicals (antibodies) that cause pathogens to clump together
so they are easier for phagocytes to engulf and digest.
Alleles correct answers
different versions of the same gene.
amino acids correct answers
monomer used to build polypeptides and thus proteins.
anabolism (anabolic) correct answers
reactions of metabolism that construct molecules from smaller
units. These reactions require energy from the hydrolysis of ATP.
analogous structures correct answers
structures that have adapted to perform the same function but
have a different origin.
Anaphase correct answers
, OCR A LEVEL BIOLOGY YEAR 1 EXAM QUESTIONS AND
ANSWERS LATEST DOWNLOADED 2025/2026 ALL
ANSWERS GET IT 100% CORRECT DETAILED BEST
GRADED A+ FOR SUCCESS
third stage of mitosis when chromatids are separated to
opposite poles of the cell.
antibiotic-resistant bacteria correct answers
bacteria that undergo mutation to become resistant to an
antibiotic and then survive to increase in number.
Antibiotics correct answers
a chemical or compound that kills or inhibits the growth of
bacteria.
Antibodies correct answers
Y-shaped glycoproteins made by B cells of the immune system
in response to the presence of an antigen.
Antigen correct answers
identifying chemical on the surface of a cell that triggers an
immune response.
antigen−antibody complex correct answers
the complex formed when an antibody binds to an antigen.
antigen-presenting cell (APC) correct answers
