Major Macromolecules Identify and tell the functions of the major macromolecules.

Expert Answers

An illustration of the letter 'A' in a speech bubbles

There are four major types of macromolecules; carbohydrate, protein, lipid and nucleic acid. Carbohydrate functions as structure maintenance, transportable and storage forms of energy. Glucose is a common source of energy for many animals and cellulose, a type of polysaccharide, works in maintaining structure in plants. Protein functions in various areas like the immune system, nutrition and signalling. Enzymes, which are crucial for chemical reactions, are proteins. All proteins have a nitrogen atom bound to it. Lipid can work as a storage of energy or as hormones. Since one gram of lipid can contain more than double the energy of carbohydrate or protein, it is an efficient source of energy. Nucleic acid consists of nucleotides and functions in storing genetic information.

See eNotes Ad-Free

Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.

Get 48 Hours Free Access
Approved by eNotes Editorial Team