Metabolism, Cell Respiration and Photosynthesis (AHL)
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Metabolism
SubtopicMetabolism under Metabolism, Cell Respiration and Photosynthesis (AHL) for Grade 12 IB.
Preview questions (no answers)
- 1.
Which part of the enzyme-substrate complex is responsible for lowering the activation energy?
A.The allosteric site
B.The active site
C.The non-polar R-groups on the surface
D.The peptide bonds in the backbone
- 2.
Why does a non-competitive inhibitor lower the ?
A.It reduces the total number of functional enzyme molecules
B.It makes the substrate bind more tightly
C.It mimics the substrate perfectly
D.It increases the activation energy of the reaction
- 3.
Which of the following is an example of an anabolic reaction?
A.Condensation of amino acids to form a polypeptide
B.Hydrolysis of triglycerides into fatty acids
C.Oxidation of glucose in respiration
D.Decomposition of hydrogen peroxide by catalase
Download the worksheet for Metabolism, Cell Respiration and Photosynthesis (AHL) - Metabolism to practice offline. It includes additional chapter-level practice questions.
Cell respiration
SubtopicCell respiration under Metabolism, Cell Respiration and Photosynthesis (AHL) for Grade 12 IB.
Preview questions (no answers)
- 1.
What happens to the produced in glycolysis during anaerobic respiration in humans?
A.It enters the electron transport chain
B.It is used to reduce pyruvate to lactate
C.It is oxidized in the Krebs cycle
D.It is converted back to glucose
- 2.
Which 3-carbon compound is formed when pyruvate is reduced during anaerobic respiration in animal cells?
A.Ethanol
B.Citrate
C.Lactate
D.Acetyl-CoA
- 3.
Why is the inner mitochondrial membrane folded into cristae?
A.To provide more space for the Krebs cycle enzymes
B.To increase the rate of ATP production by providing more space for ETC components
C.To reduce the volume of the intermembrane space
D.To facilitate the movement of pyruvate into the matrix
Download the worksheet for Metabolism, Cell Respiration and Photosynthesis (AHL) - Cell respiration to practice offline. It includes additional chapter-level practice questions.
Photosynthesis
SubtopicPhotosynthesis under Metabolism, Cell Respiration and Photosynthesis (AHL) for Grade 12 IB.
Preview questions (no answers)
- 1.
What is the chemical name for the 3-carbon sugar produced by the Calvin cycle?
A.Glycerate-3-phosphate
B.Triose phosphate
C.Pyruvate
D.Ribulose
- 2.
What is the immediate source of energy for the regeneration of RuBP from triose phosphate?
A.Light
B.ATP
C.NADPH
D.Glucose
- 3.
Why is the Calvin cycle referred to as 'light-independent'?
A.It only happens at night
B.It does not directly use photons as an energy source
C.It does not require any products from the light-dependent reactions
D.It occurs in the absence of chlorophyll
Download the worksheet for Metabolism, Cell Respiration and Photosynthesis (AHL) - Photosynthesis to practice offline. It includes additional chapter-level practice questions.