Biology
Higher and Standard level
Specimen papers 1A, 1B and 2
For first examinations in 2025
, CONTENTS
Biology higher level paper 1A specimen question paper
Biology higher level paper 1A specimen markscheme
Biology higher level paper 1B specimen question paper
Biology higher level paper 1B specimen markscheme
Biology higher level paper 2 specimen question paper
Biology higher level paper 2 specimen markscheme
Biology standard level paper 1A specimen question paper
Biology standard level paper 1A specimen markscheme
Biology standard level paper 1B specimen question paper
Biology standard level paper 1B specimen markscheme
Biology standard level paper 2 specimen question paper
Biology standard level paper 2 specimen markscheme
,Biology
Higher level
Paper 1A
Specimen Paper
2 hours [Paper 1A and Paper 1B]
Instructions to candidates
y Do not open this examination paper until instructed to do so.
y Answer all questions.
y For each question, choose the answer you consider to be the best and indicate your choice on
the answer sheet provided.
y A calculator is required for this paper.
y The maximum mark for paper 1A is [40 marks].
y The maximum mark for paper 1A and paper 1B is [75 marks].
0000 – 6001
17 pages © International Baccalaureate Organization 2023
, –2– 0000 – 6001
1. What allows the movement of water under tension in the xylem?
A. Adhesion of water molecules to dissolved mineral salts
B. Cohesion of water molecules due to hydrogen bonding
C. Adhesion between water molecules due to uneven sharing of charges
D. Cohesion between water molecules and other polar substances
2. The diagram shows the elements present in two organic molecules, W and X.
Which molecules could W and X be?
Molecule W Molecule X
Hydrogen
Phosphorus Carbon Nitrogen
Oxygen
Molecule W Molecule X
A. monosaccharide amino acid
B. nucleic acid triglyceride
C. phospholipid protein
D. triglyceride fatty acid
Higher and Standard level
Specimen papers 1A, 1B and 2
For first examinations in 2025
, CONTENTS
Biology higher level paper 1A specimen question paper
Biology higher level paper 1A specimen markscheme
Biology higher level paper 1B specimen question paper
Biology higher level paper 1B specimen markscheme
Biology higher level paper 2 specimen question paper
Biology higher level paper 2 specimen markscheme
Biology standard level paper 1A specimen question paper
Biology standard level paper 1A specimen markscheme
Biology standard level paper 1B specimen question paper
Biology standard level paper 1B specimen markscheme
Biology standard level paper 2 specimen question paper
Biology standard level paper 2 specimen markscheme
,Biology
Higher level
Paper 1A
Specimen Paper
2 hours [Paper 1A and Paper 1B]
Instructions to candidates
y Do not open this examination paper until instructed to do so.
y Answer all questions.
y For each question, choose the answer you consider to be the best and indicate your choice on
the answer sheet provided.
y A calculator is required for this paper.
y The maximum mark for paper 1A is [40 marks].
y The maximum mark for paper 1A and paper 1B is [75 marks].
0000 – 6001
17 pages © International Baccalaureate Organization 2023
, –2– 0000 – 6001
1. What allows the movement of water under tension in the xylem?
A. Adhesion of water molecules to dissolved mineral salts
B. Cohesion of water molecules due to hydrogen bonding
C. Adhesion between water molecules due to uneven sharing of charges
D. Cohesion between water molecules and other polar substances
2. The diagram shows the elements present in two organic molecules, W and X.
Which molecules could W and X be?
Molecule W Molecule X
Hydrogen
Phosphorus Carbon Nitrogen
Oxygen
Molecule W Molecule X
A. monosaccharide amino acid
B. nucleic acid triglyceride
C. phospholipid protein
D. triglyceride fatty acid
