Question:
Bacteria are classified as Gram positive and Gram negative on the basis of the polysaccharide (primarily peptidoglycan) content of their cell walls. Explain the difference between the two types based on Gram staining character? Please note that Gram positive appear purple and Gram negative appear pink on microscopic examination is not an answer. Your answer must include a suitable explanation at the molecular level with reference to bacterial cell wall composition.
Explain the structural and functional advantages of quaternary association with reference to proteins? Your answer must include the definition of quaternary structure, at least two examples of proteins exhibiting quaternary structure, and at least three advantages of quaternary association.
A) Explaining the difference in Gram staining character supported by a suitable explanation at the molecular level with reference to bacterial cell wall composition (4 points); an appropriate example of Gram positive and Gram negative bacteria (0.5 points each). B) Definition of quaternary structure (1 point); two examples of proteins exhibiting quaternary structure (0.5 points each); three advantages of quaternary association (3 points).
Question:
Bacteria are classified as Gram positive and Gram negative on the basis of the polysaccharide (primarily peptidoglycan) content of their cell walls. Explain the difference between the two types based on Gram staining character? Please note that Gram positive appear purple and Gram negative appear pink on microscopic examination is not an answer. Your answer must include a suitable explanation at the molecular level with reference to bacterial cell wall composition.
Explain the structural and functional advantages of quaternary association with reference to proteins? Your answer must include the definition of quaternary structure, at least two examples of proteins exhibiting quaternary structure, and at least three advantages of quaternary association.
A) Explaining the difference in Gram staining character supported by a suitable explanation at the molecular level with reference to bacterial cell wall composition (4 points); an appropriate example of Gram positive and Gram negative bacteria (0.5 points each). B) Definition of quaternary structure (1 point); two examples of proteins exhibiting quaternary structure (0.5 points each); three advantages of quaternary association (3 points).
