IB Biology
1. protein: macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; they are made of subunits of
Amino acids, needed by the body for growth and repair and to make up enzymes
2. phospholipid: The phospholipids are not "true fats" because they have one of the fatty acids replaced by a
phosphate group
3. natural fat: protect and insulate body organs (major source of stored energy in the body)
4. steroid: Steroids are lipids because they are hydrophobic and insoluble in water, but they not resemble lipids
do since they have a structure composed of four fused rings
5. carbohydrate: compound made up of carbon, hydrogen, and oxygen atoms; major e of energy for the
sourc human body
6. nucleic acid: macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus. Forming
DNA and RNA
7. lipids: macromolecule made mainly from carbon and hydrogen atoms to form 3 fatty acids and a glycerol;
includes fats, oils, and waxes
ic solvents
Lipids are a group of organic molecules that are insoluble in water but soluble in non-polar organ
Common lipids include triglycerides (fats and oils), phospholipids and steroids
8. active site: the active site is the region of an enzyme where substrate molecules bind and u ndergo a chemical
reaction
9. glycogen: Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage
in animals and fungi
10. cellulose: Cellulose is a long chain of linked sugar molecules that gives wood its remarkable strength. It is
the main component of plant cell walls, and the basic building block for many textiles and for paper.
11. starch: A naturally abundant nutrient carbohydrate, (C6H10O5)n, found chiefly in the seeds, fruits, tubers,
, roots, and stem pith of plants, notably in corn, potatoes, wheat, and rice, and varying widely in appearance
according to source but commonly prepared as a white amorphous tasteless powder.
1. protein: macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; they are made of subunits of
Amino acids, needed by the body for growth and repair and to make up enzymes
2. phospholipid: The phospholipids are not "true fats" because they have one of the fatty acids replaced by a
phosphate group
3. natural fat: protect and insulate body organs (major source of stored energy in the body)
4. steroid: Steroids are lipids because they are hydrophobic and insoluble in water, but they not resemble lipids
do since they have a structure composed of four fused rings
5. carbohydrate: compound made up of carbon, hydrogen, and oxygen atoms; major e of energy for the
sourc human body
6. nucleic acid: macromolecule containing hydrogen, oxygen, nitrogen, carbon, and phosphorus. Forming
DNA and RNA
7. lipids: macromolecule made mainly from carbon and hydrogen atoms to form 3 fatty acids and a glycerol;
includes fats, oils, and waxes
ic solvents
Lipids are a group of organic molecules that are insoluble in water but soluble in non-polar organ
Common lipids include triglycerides (fats and oils), phospholipids and steroids
8. active site: the active site is the region of an enzyme where substrate molecules bind and u ndergo a chemical
reaction
9. glycogen: Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage
in animals and fungi
10. cellulose: Cellulose is a long chain of linked sugar molecules that gives wood its remarkable strength. It is
the main component of plant cell walls, and the basic building block for many textiles and for paper.
11. starch: A naturally abundant nutrient carbohydrate, (C6H10O5)n, found chiefly in the seeds, fruits, tubers,
, roots, and stem pith of plants, notably in corn, potatoes, wheat, and rice, and varying widely in appearance
according to source but commonly prepared as a white amorphous tasteless powder.
