What are 2 roles of lipids?
Structure
Membranes
Electrical insulation
Transport
Fibre is a carbohydrate.
Why is Fibre an essential nutrient?
It provides energy for metabolic reactions
It is used to build tissue
it is used a bulk for the intestinal muscles to push against
Vitamins and minerals are used to create enzymes.
Metabolism is...?
The number of catabolic reactions that take place in an organism
All the chemical reactions that take place in an organism
The rate at which all chemical reaction happen in an organism
Which of the following are the key biological molecules?
Vitamins and Minerals
Nucleic acids
Water
Fibre
Lipids
Phosphates
All biological molecules are carbon based.
Which is the most abundant biological molecule?
Carbohydrates
Proteins
Nucleic Acids
None
What percentage of an organism is made up of Carbon, Hydrogen, Oxygen and Nitrogen?
76%
87%
99%
Lipids are used for both thermal and electrical insulation.
