| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.HL.TZ2.7 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Identify | Question number | 7 | Adapted from | N/A |
Question
The diagrams show three representations of the structure of the same chemical substance.
What chemical substance is shown?
A. Ribose
B. Glucose
C. Fatty acid
D. Amino acid
Markscheme
B
Examiners report
There were some suggestions from teachers that candidates could not be expected to understand the molecular diagrams included here, but nearly 85% of candidates identified the compound correctly as glucose. The commonest wrong answer was ribose, perhaps because candidates counted five carbon atoms in the ring and forgot the sixth carbon attached to C5.
Syllabus sections
Show 69 related questions
- 17N.1.HL.TZ0.05: Which of the molecules contain peptide bonds or are sugar molecules?
- 17N.2.SL.TZ0.05c: Compare and contrast cis-fatty acids and trans-fatty acids.
- 17N.1.SL.TZ0.08: The Framingham heart study was an observational study that went on for 20 years. The...
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
- 17M.2.SL.TZ2.6a: Describe the structure and function of starch in plants.
- 17M.2.SL.TZ1.6b: Distinguish between the structures of the different types of fatty acids in food.
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 17M.1.HL.TZ1.8: What type of molecule is shown in this diagram? A. Trans saturated fatty acid B. Cis...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive...
- 16M.2.HL.TZ0.2b: Draw the structure of a saturated fatty acid.
- 16M.2.HL.TZ0.2a: (i) Using the nomogram, state the lower weight limit for a woman with the height...
- 16N.1.HL.TZ0.7: Olive oil may reduce the risk of coronary heart disease. What is/are the compound(s)...
- 16N.1.SL.TZ0.7: The diagram shows a molecular structure. Which type of molecule is shown? A. Amino acidB....
- 16N.1.SL.TZ0.6: Which type of reaction is the breakdown of starch into sugars? A. DenaturationB. ReductionC....
- 16M.1.HL.TZ0.3: Which molecule is a polysaccharide? A. GlucagonB. GlucoseC. GlycerolD. Glycogen
- 16M.1.HL.TZ0.1: Which molecule is a sugar?
- 15M.1.HL.TZ1.8: Which sugars are examples of a monosaccharide and disaccharide?
- 15M.1.SL.TZ2.1: Which molecule is a polysaccharide?A. CelluloseB. FructoseC. MaltoseD. Sucrose
- 15M.2.SL.TZ1.2a: Milk contains lactose which some people can digest but some cannot. State what type of sugar...
- 15M.2.SL.TZ1.2b: Milk contains lactose which some people can digest but some cannot. State a function of...
- 15N.1.SL.TZ0.6: Which always contains carbon, hydrogen and oxygen? I. Carbohydrate II. Protein III....
- 15N.1.HL.TZ0.7: Which always contains carbon, hydrogen and oxygen? I. Carbohydrate II. Protein III....
- 15M.1.SL.TZ1.8: What are these molecules?
- 15N.2.SL.TZ0.4c: List two examples of polysaccharides.
- 13M.1.HL.TZ1.6: Which molecules are monosaccharides? A. starch, glycogen, celluloseB. sucrose, maltose,...
- 13M.1.HL.TZ2.8: Which carbohydrates are used to provide energy storage in plants and animals?
- 13M.1.HL.TZ2.6: Which molecules show a monosaccharide and a fatty acid?
- 13N.1.SL.TZ0.8: Which are functions of lipids?A. Hydrophilic solvent and energy storageB. Hydrophobic solvent...
- 13M.1.SL.TZ1.7: What process occurs when fatty acids combine with glycerol to make a triglyceride? A....
- 13N.3.SL.TZ0.3a: Outline the molecular structure of different types of fatty acids.
- 11M.1.SL.TZ2.8: What is the difference between galactose and lactose? A. Lactose is a disaccharide and...
- 12M.2.HL.TZ1.5a: Outline, with examples, the types of carbohydrate found in living organisms.
- 12M.1.HL.TZ1.7: Which sugars are both disaccharides? A. maltose and lactose B. lactose and fructose C....
- 12M.1.SL.TZ2.6: The diagrams show three representations of the structure of the same chemical...
- 12M.2.SL.TZ1.5a: Outline, with examples, the types of carbohydrate found in living organisms.
- 12M.3.SL.TZ2.2a: List two possible variants in the molecular structure of unsaturated fatty acids.
- 09M.1.SL.TZ2.8: Which molecule is shown below? A. GlucoseB. GalactoseC. RiboseD. Sucrose
- 09M.1.HL.TZ2.36: Which chemical is shown in the diagram below? A. MonosaccharideB. TriglycerideC. Fatty...
- 10M.2.HL.TZ1.2b (ii): State the type of chemical reaction that occurs when lactose is digested into glucose and...
- 10M.2.HL.TZ1.2a: Glucose and galactose are examples of monosaccharides. State one other example of a...
- 10M.2.HL.TZ1.2b (i): There are several different types of carbohydrate. State which type of carbohydrate lactose is.
- 10M.2.HL.TZ2.1h: Suggest one advantage and one disadvantage for blood sampling rather than weighing birds to...
- 10M.2.HL.TZ2.1e: Describe, using the triglyceride levels graph, the results at Site 1 and Site 2 for all of...
- 10M.2.HL.TZ2.1g: Scientists have hypothesized that the food quality is better at Site 1 than at Site 2....
- 10M.2.HL.TZ2.1f: Explain the differences in the triglyceride level and butyrate level for the hermit thrush at...
- 10M.1.SL.TZ1.8: Which describes these molecules correctly?
- 10M.1.SL.TZ2.10: Which of the following is a function of cellulose in plants? A. Storage of fat B. Formation...
- 10M.2.SL.TZ1.2b (i): There are several different types of carbohydrate. State which type of carbohydrate lactose is.
- 10M.2.SL.TZ1.2a: Glucose and galactose are examples of monosaccharides. State one other example of a...
- 10M.2.SL.TZ1.2b (ii): State the type of chemical reaction that occurs when lactose is digested into glucose and...
- 10M.2.SL.TZ2.5a: Outline the role of hydrolysis in the relationships between monosaccharides, disaccharides...
- 11N.1.HL.TZ0.5: Which statement describes glycogen? A. It is a hormone involved in the control of blood...
- 11N.1.HL.TZ0.7: What substance is represented by this structure? A. Glycerol B. Fatty acid C. Cellulose...
- 11N.2.SL.TZ0.6b: Outline the role of condensation and hydrolysis in the relationship between fatty acids,...
- 11N.3.SL.TZ0.1a: Measure the difference between the percentage of overweight men and the percentage of...
- 11N.3.SL.TZ0.1b: State the range of the body mass index (BMI) that corresponds to overweight status.
- 11N.3.SL.TZ0.1c: Compare the percentage of men and women who exercised daily.
- 12N.2.HL.TZ0.1b: Compare the composition of natural human surfactant with synthetic surfactants.
- 11N.1.SL.TZ0.8: What is a function of cellulose in plants? A. To form a mesh of fibres in the cell wall B....
- 12N.2.HL.TZ0.1a: State the surfactant that contains the least amount of phospholipids.
- 12N.2.HL.TZ0.1c: Phospholipids found in the surfactants form a surface film on the moist lining of the...
- 12N.1.HL.TZ0.5: Which structure represents a fatty acid?
- 12N.2.SL.TZ0.5a: Outline the role of condensation and hydrolysis in metabolic reactions involving...
- 12N.3.SL.TZ0.1b (i): Identify the mass above which a man whose height is 185 cm would be classified as obese.
- 10N.2.SL.TZ0.4a: State four elements that are needed by living organisms, other than carbon, hydrogen and...
- 09N.3.SL.TZ0.1e: State the body mass index (BMI) below which a person is considered to be underweight.
- 09N.3.SL.TZ0.3: Outline the variation in the structure of fatty acids.
- 17M.1.SL.TZ1.6: A polymer of alpha-D-glucose found in plants has mostly 1,4 linkages and some 1,6 linkages....
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
