Sure, let's go through each part of your question one at a time:
Part A: Which molecule is not a carbohydrate?
- Correct Answer: Lipid
Lipid is not a carbohydrate; it is a different class of biomolecule that is primarily made up of carbon and hydrogen and is not a polymer of monosaccharides like starch, cellulose, and glycogen.
Part B: Which of the following statements about monosaccharide structure is true?
- Correct Answer: Monosaccharides can be classified according to the spatial arrangement of their atoms.
This is true because monosaccharides can differ in the arrangement of hydroxyl groups and their configuration (D and L forms), which affects their properties.
Part C: True or false? Peptidoglycan is a polysaccharide found only in bacteria.
- Correct Answer: True
Peptidoglycan is indeed found only in the cell walls of bacteria and is not present in other organisms.
Part D: Which complex carbohydrate contains only a-1,4-glycosidic linkages?
- Correct Answer: Amylose
Amylose, which is a component of starch, consists only of α-1,4-glycosidic linkages.
Part E: Which of the following complex carbohydrates is listed with its correct function?
- Correct Answer: Cellulose: structural component of plant cell walls
This statement is correct; cellulose serves as a structural component in the cell walls of plants.
Part F: Which polysaccharide contains a modified monosaccharide?
- Correct Answer: Peptidoglycan
Peptidoglycan contains a modified monosaccharide (N-acetylglucosamine) as part of its structure.
Feel free to ask if you need any more information or clarification!
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