Lecture 6 - Polysaccharides- Polymers of glucose (only...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 6 (9/16/11) 4 Macromolecules o Carbohydrates (sugars) o Lipids o Proteins o Nucleic acid Carbs o Sugars (-ose, sacch, glyco) o Polymers- chains of sugars o Monosaccharide- singles sugar o Polysaccharides- polymer of sugar Role of carbs o Energy- respiration into metabolism o Energy storage o Used structurally o Cellulose, cell to cell recognition Sugars o Contains carbonyl group and multiple hydroxyls o Glucose is the most common o Classification by position of carbonyl, or by number of carbons o Triose- 3 carbons, pentose- 5 carbons, hexose- 6 carbons o In aqueous solutions, the straight backbone structure isn’t as common as ring forms. It will fluctuate between both forms in aqueous solutions but the dominant form is ring form o Urbance is a bitch Sugars can be linked together using condensation reactions Most sugars are disaccharides, 2 sugars bonded together using glycocidic bonds
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Polysaccharides- Polymers of glucose (only glucose molecules stuck together). Energy storage in starch (only in plants) Glycogen- polymer of glucose in animals Plants use cellulose in their cell walls, it is a polymer of glucose Chitin- molecule of glucose, also used as the exoskeleton cell walls Cellulose is strong structurally, cross linked chains of glucose, using alpha bonds Lipids do not form polymers but can still be very large Lipids are hydrophobic, because they are almost all hydrocarbons 3 types, fats (oils), phospholipids, steroids Lipids can act as hormones that are used as signals to carry information They can also store lots of energy, and be used as insulation, and cushion. Phospholipids? Make up cell walls in most cells...
View Full Document

Ask a homework question - tutors are online