Hi I need help with two Molecular Biology Questions
1. Bacteria are protected from increases in osmotic pressure bytheir cell walls. A major structural component of the cell wallresponsible for its protective properties is the polysaccharidepeptidoglycan. Which of the following best explains the rigidityand strength of the bacterial cell wall (choose all thatapply)?
A) Peptidoglycan forms linear, parallelstrands
B) Neighboring peptidoglycan strands are linked by peptidebonds
C) Peptidoglycan forms a highly branched structuredue to its alpha 1,6 glycosidic linkages.
D) The glycosidic linkages between themonosaccharide building blocks in peptidoglycan are extraordinarilystrong.
E) The polysaccharides in peptidoglycan formhelical structures, as in cellulose.
2. Pure cellulose from the seed threads of cotton is tough,fibrous, and completely insoluble in water. In contrast, glycogenfrom muscle or liver disperses readily in hot water to make aturbid solution. Although markedly different in physicalproperties, both substance are composed of (1-> 4) linkedD-glucose polymers of comparable molecular weight. Which of thefeatures below are responsible for the difference in physicalproperties of these glucose polymers (choose all that apply)?
A) Glycogen also has (1-> 6) linkages
B) The glycosidic linkages in cellulose are beta linkages whichresult in the formation of extended linear strands
C) Glucose monomers in glycogen are linked by alpha linkages whichcause a bend in the chain and prevent formation of longfibers
D) Parallel cellulose fibers are linked by hydrogen bonds, creatingtightly associated durable fibers.
E) Many of glycogenâs hydroxyl groups are exposed to water
Hi I need help with two Molecular Biology Questions
1. Bacteria are protected from increases in osmotic pressure bytheir cell walls. A major structural component of the cell wallresponsible for its protective properties is the polysaccharidepeptidoglycan. Which of the following best explains the rigidityand strength of the bacterial cell wall (choose all thatapply)?
A) Peptidoglycan forms linear, parallelstrands
B) Neighboring peptidoglycan strands are linked by peptidebonds
C) Peptidoglycan forms a highly branched structuredue to its alpha 1,6 glycosidic linkages.
D) The glycosidic linkages between themonosaccharide building blocks in peptidoglycan are extraordinarilystrong.
E) The polysaccharides in peptidoglycan formhelical structures, as in cellulose.
2. Pure cellulose from the seed threads of cotton is tough,fibrous, and completely insoluble in water. In contrast, glycogenfrom muscle or liver disperses readily in hot water to make aturbid solution. Although markedly different in physicalproperties, both substance are composed of (1-> 4) linkedD-glucose polymers of comparable molecular weight. Which of thefeatures below are responsible for the difference in physicalproperties of these glucose polymers (choose all that apply)?
A) Glycogen also has (1-> 6) linkages
B) The glycosidic linkages in cellulose are beta linkages whichresult in the formation of extended linear strands
C) Glucose monomers in glycogen are linked by alpha linkages whichcause a bend in the chain and prevent formation of longfibers
D) Parallel cellulose fibers are linked by hydrogen bonds, creatingtightly associated durable fibers.
E) Many of glycogenâs hydroxyl groups are exposed to water
