Essential Idea
Compounds of carbon, hydrogen and oxygen are used to supply and store energy.
Understandings
Monosaccharide monomers are linked together by condensation reactions to form disaccharides and polysaccharide polymers.
Fatty acids can be saturated, monounsaturated or polyunsaturated.
Unsaturated fatty acids can be cis or trans isomers.
Triglycerides are formed by condensation from three fatty acids and one glycerol.
Applications
Structure and function of cellulose and starch in plants and glycogen in humans.
Scientific evidence for health risks of trans fats and saturated fatty acids.
Lipids are more suitable for long-term energy storage in humans than carbohydrates.
Evaluation of evidence and the methods used to obtain the evidence for health claims made about lipids.
Skills
Use of molecular visualization software to compare cellulose, starch and glycogen (VIDEO).
Determination of body mass index by calculation or use of a nomogram (VIDEO).
Guidance
The structure of starch should include amylose and amylopectin.
Named examples of fatty acids are not required.
Sucrose, lactose and maltose should be included as examples of disaccharides produced by combining monosaccharides.
Key Vocabulary
Lipid
Hydrocarbon
Saturated
Unsaturated
Fatty acid
Triglyceride
Phospholipid
Carbohydrate
Monosaccharide
Disaccharide
Polysaccharide
Linear
Branching
Textbook Reading and/or Activities
Click HERE for a pdf of chapter 2.
Pages XYZ-XYZ
Nature of Science (p.XYZ)
Challenge Yourself (p.XYZ)
Notes
A detailed set of notes, prepared by Bob Smullen, examining all of the IB learning expectations.
i-Biology Notes (Not available)
A detailed set of notes, prepared by Stephen Taylor, examining U1 - U and A1 - A.
A series of questions, prepared by Stephen Taylor, to help check your understanding of the IB learning expectations. This is VERY GOOD practice.
A detailed set of notes, created by Chris Paine, examining all of the IB learning expectations.
A series of questions, created by Chris Paine, to help check your understanding of the IB learning expectations. This is VERY GOOD practice.
A detailed set of notes, prepared by Jacob Cedarbaum, examining all of the IB learning expectations.
2.3 Study Questions (NEW Syllabus)
A series of questions, prepared by Jacob Cedarbaum, to help check your understanding of the IB learning expectations. This is VERY GOOD practice. Answers (OLD).
Learning Activities
Molecular Workbench - Lipids & Carbs
An interactive online module enabling you to explore the differences between lipids and carbohydrates. Having trouble? Use these screen shots to see what you're missing.
Practice: Lipids and Carbohydrates
Practice problems to support your understanding of lipid and carbohydrate structure and function.
Supplemental Reading
Title
Description
This video makes clear the major differences between carbohydrates, lipids, proteins and nucleic acids (which are coming up soon in the course).
Should Watch Videos
This video outlines the differences between carbohydrates, lipids and proteins as well as discussing their importance to living organisms.
This video outlines the basics of carbohydrate structure and function within living organisms.
Must Watch Videos