Practice IB Biology Topic 2.3 Carbohydrates and Lipids with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 2.3 Carbohydrates and Lipids and mirrors Paper 1A, 1B, 2 style where relevant.
Get instant solutions, detailed explanations, and build confidence with questions aligned to IB examiner expectations.
Glucose and galactose are examples of monosaccharides. State one other example of a monosaccharide.
There are several different types of carbohydrate. State which type of carbohydrate lactose is.
State the type of chemical reaction that occurs when lactose is digested into glucose and galactose.
Lactase is widely used in food processing. Explain three reasons for converting lactose to glucose and galactose during food processing.
Simple laboratory experiments show that when the enzyme lactase is mixed with lactose, the initial rate of reaction is highest at 48°C. In food processing, lactase is used at a much lower temperature, often at 5°C. Suggest reasons for using lactase at relatively low temperatures.
The graph shows the amounts of two substances present in food ingested by a healthy person as it moves along the gut.
Which substances could X and Y be?
How is the sequence of DNA conserved?
The diagrams represent three different types of fatty acids found in human nutrition.
Which fatty acid is cis-unsaturated, and what is its typical state at room temperature ()?
| Cis-unsaturated fatty acid | Typical state at | |
|---|---|---|
| A. | I | Solid |
| B. | II | Liquid |
| C. | II | Solid |
| D. | III | Liquid |
Living organisms produce a wide variety of organic compounds.
Define the term organic.
State the three most commonly occurring elements.
Some organic compounds contain other elements. State one substance, or group of substances, that contains nitrogen.
Some organic compounds contain other elements. State one substance, or group of substances, that contains phosphorus.