IB BIOLOGY PRACTICE EXAM 2026
SOLVED QUESTIONS WITH FULL
EXPLANATIONS
◉dehydration synthesis (condensation reaction). Answer:
◉examples of polysaccharides (all made of glucose). Answer: starch,
glycogen, cellulose
◉Cellulose. Answer: major component of cell walls, helps give
rigidity support to roots, stems, and leaves
◉Starch. Answer: A storage polysaccharide in plants consisting
entirely of glucose; usually located in roots
◉Glycogen. Answer: Storage form of glucose in animals; usually
located in liver and muscle tissue
◉saturated fatty acid. Answer: carbons are saturated with hydrogen
atoms; generally solid at room temperature; no double bonds
, ◉monounstaturated fatty acids. Answer: one double bond exists in
the chain of a hydrocarbon; cause one "kink" or bend in the molecule
◉polyunsaturated fatty acid. Answer: two or more double bonds in
the carbon chain; usually liquid at room temperature
◉Hydrogenation. Answer: The process of converting unsaturated
fats to saturated fats by adding hydrogen
◉cis fatty acids. Answer: Two covalent single C-C bonds angle in the
same direction adjacent to the C=C double bond
◉trans fatty acids. Answer: fatty acids with hydrogens on opposite
sides of the double bond
◉adipose tissue. Answer: Tissue that stores fat (triglyceride lipids).
◉BMI (body mass index). Answer: a measure of body weight relative
to height
◉amino acids. Answer: a simple organic compound containing both
a carboxyl (—COOH) and an amino (—NH2) group; linked together
by condensation to form polypeptides.
SOLVED QUESTIONS WITH FULL
EXPLANATIONS
◉dehydration synthesis (condensation reaction). Answer:
◉examples of polysaccharides (all made of glucose). Answer: starch,
glycogen, cellulose
◉Cellulose. Answer: major component of cell walls, helps give
rigidity support to roots, stems, and leaves
◉Starch. Answer: A storage polysaccharide in plants consisting
entirely of glucose; usually located in roots
◉Glycogen. Answer: Storage form of glucose in animals; usually
located in liver and muscle tissue
◉saturated fatty acid. Answer: carbons are saturated with hydrogen
atoms; generally solid at room temperature; no double bonds
, ◉monounstaturated fatty acids. Answer: one double bond exists in
the chain of a hydrocarbon; cause one "kink" or bend in the molecule
◉polyunsaturated fatty acid. Answer: two or more double bonds in
the carbon chain; usually liquid at room temperature
◉Hydrogenation. Answer: The process of converting unsaturated
fats to saturated fats by adding hydrogen
◉cis fatty acids. Answer: Two covalent single C-C bonds angle in the
same direction adjacent to the C=C double bond
◉trans fatty acids. Answer: fatty acids with hydrogens on opposite
sides of the double bond
◉adipose tissue. Answer: Tissue that stores fat (triglyceride lipids).
◉BMI (body mass index). Answer: a measure of body weight relative
to height
◉amino acids. Answer: a simple organic compound containing both
a carboxyl (—COOH) and an amino (—NH2) group; linked together
by condensation to form polypeptides.
