Which of the following statements is true regarding cellulose? Select one: A. It is a primary structural component of plant cell walls. B. It is digestible by bacteria in the human gut. C. It is a polymer of glucose joined by α glycosidic linkages. D. It is a polymer composed of enantiomers

Draw a lipid exhibiting both an ether-linked and ester-linked acyl group attached to a glycerol phosphate backbone. Then attached an appropriate head group to the phosphate (ethanolamine, choline, serine, etc.)

A) Briefly describe the basic structure of phospholipids and explain how they can provide an effective barrier against the unregulated movement of molecules into or out of cells. B) Not all phospholipids are identical to one another. Describe two components (parts) of that can be altered to create variation between different phospholipids.

A disaccharide is composed of two monosaccharides connected by a glycosidic bond. Select one: a. False b. True

Glucose polymers: Which of the following is/are FALSE? a. Beta-glycosidic bonds are found in starch, glycogen and chitin b. Beta-glycosidic bonds are found in cellulose and chitin C. alpha-glycosidic bonds are found in starch and glycogen d. alpha-glycosidic bonds are found in chitin and cellulose O b,c.d O a, b, c, d а, d a,b, d

The figure below illustrates partial models of a starch molecule and a cellulose molecule, two carbohydrate polymers that are each made of covalently bonded glucose molecules. Starch A B CH₂OH C OH D OH CH₂OH OH OH 0 CH₂OH OH Partial models of a starch and a cellulose molecule Cellulose OH OH OH CH₂OH 0 CH₂OH OH Which of the following best explains why human enzymes that can digest starch cannot also digest cellulose despite the fact that they are both polymers of glucose? OH CH₂OH OH OH Human enzymes can only facilitate the digestion of starch because starch is formed via a dehydration synthesis reaction. The breakdown of starch involves a catabolic reaction, but the breakdown of cellulose Involves an anabolic reaction, which does require enzymatic catalysis. The polymers are digested differently because starch is primarily used for energy stor age while cellulose is primarily used as the component of plant cell walls. The biomolecular differences between the polymers prevent…