EGEE 439 Exam 2 UPDATED Exam
Questions and CORRECT Answers
Carbohydrates - CORRECT ANSWER - the sugars and complex units composed of sugar
(saccharides)
Monosaccharides - CORRECT ANSWER - molecule that is in a ring structure with carbons
and oxygen (Glucose, Galactose, Fructose)
Disaccharides - CORRECT ANSWER - dimers of the monomers (Sucrose [glucose
+fructose], lactose [glucose + galactose], maltose [glucose + glucose])
Carbohydrates are connected with ____ bond - CORRECT ANSWER - Glycosidic
Polysaccharides - CORRECT ANSWER - Glycogen, starch, and cellulose
Glycogen - CORRECT ANSWER - Molecule in which animals store glucose by polymerizing
glucose
Starch is made up of 2 components - CORRECT ANSWER - 1. Amylose
2. Amylopectin
Amylose - CORRECT ANSWER - 1. linear straight chain
2. alpha 1,4- glycosidic bond linkage
3. larger scale, helical shape
4. MW: 10k-50k amu
4. glucose units: 6-300
Amylopectin - CORRECT ANSWER - 1. branched chains
, 2. alpha 1,4 & 1,6-glycosidic bond linkage
3. 10x the size of amylose
4. MW: 300k amu
5. glucose units: 1800
Cellulose - CORRECT ANSWER - 1. Most abundant polysaccaride and biomass on Earth
2. beta-1,4-linkage
3. H-bond to make it strong and linear (not helical)
4. long fibers
5. MW: 50-500k amu
6. glucose units: 300-2500
Hemicellulose - CORRECT ANSWER - Heteropolymer: Random amorphous structure, with
randomized repeating units
Monomers of Hemicellulose - CORRECT ANSWER - Xlyose, Mannose, Galactose,
Rhamnose, Arabinose
Polymers of Hemicellulose - CORRECT ANSWER - Xylan, Glucuronxylan, Arabinoxylan,
Glucomannan, Xyloglucan
Lignin - CORRECT ANSWER - 1. Helps to keep water from permeating cell wall
2. strengthens & supports
3. protects from fungi/bacteria/pathogens
What is lignin comprised of? - CORRECT ANSWER - 1. p-coumaryl alcohol
2. coniferal alcohol
3. synapyl alcohol
Questions and CORRECT Answers
Carbohydrates - CORRECT ANSWER - the sugars and complex units composed of sugar
(saccharides)
Monosaccharides - CORRECT ANSWER - molecule that is in a ring structure with carbons
and oxygen (Glucose, Galactose, Fructose)
Disaccharides - CORRECT ANSWER - dimers of the monomers (Sucrose [glucose
+fructose], lactose [glucose + galactose], maltose [glucose + glucose])
Carbohydrates are connected with ____ bond - CORRECT ANSWER - Glycosidic
Polysaccharides - CORRECT ANSWER - Glycogen, starch, and cellulose
Glycogen - CORRECT ANSWER - Molecule in which animals store glucose by polymerizing
glucose
Starch is made up of 2 components - CORRECT ANSWER - 1. Amylose
2. Amylopectin
Amylose - CORRECT ANSWER - 1. linear straight chain
2. alpha 1,4- glycosidic bond linkage
3. larger scale, helical shape
4. MW: 10k-50k amu
4. glucose units: 6-300
Amylopectin - CORRECT ANSWER - 1. branched chains
, 2. alpha 1,4 & 1,6-glycosidic bond linkage
3. 10x the size of amylose
4. MW: 300k amu
5. glucose units: 1800
Cellulose - CORRECT ANSWER - 1. Most abundant polysaccaride and biomass on Earth
2. beta-1,4-linkage
3. H-bond to make it strong and linear (not helical)
4. long fibers
5. MW: 50-500k amu
6. glucose units: 300-2500
Hemicellulose - CORRECT ANSWER - Heteropolymer: Random amorphous structure, with
randomized repeating units
Monomers of Hemicellulose - CORRECT ANSWER - Xlyose, Mannose, Galactose,
Rhamnose, Arabinose
Polymers of Hemicellulose - CORRECT ANSWER - Xylan, Glucuronxylan, Arabinoxylan,
Glucomannan, Xyloglucan
Lignin - CORRECT ANSWER - 1. Helps to keep water from permeating cell wall
2. strengthens & supports
3. protects from fungi/bacteria/pathogens
What is lignin comprised of? - CORRECT ANSWER - 1. p-coumaryl alcohol
2. coniferal alcohol
3. synapyl alcohol
