| 26. | Gram-negative bacteria are more resistant to antibiotics due to the presence of? |
| a. | Thin peptidoglycan wall |
| b. | Outer lipopolysaccharide layer |
| c. | Porin proteins |
| d. | Teichoic acid |
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Answer: (b).Outer lipopolysaccharide layer
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| 27. | Which of the following are present in teichoic acids? |
| a. | ribitol residues |
| b. | glycerol residues |
| c. | glucose residues |
| d. | ribitol or glycerol residues |
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Answer: (d).ribitol or glycerol residues
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| 28. | Bayer’s junctions are sites which help in joining which of the following? |
| a. | cytoplasmic membrane and outer membrane |
| b. | outer membrane and capsule |
| c. | cytoplasmic membrane and periplasmic space |
| d. | peptidoglycan layer and cytoplasmic membrane |
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Answer: (a).cytoplasmic membrane and outer membrane
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| 29. | Polyisoprenoid branched-chain lipids, are present in which of the following? |
| a. | Archaebacteria |
| b. | Eubacteria |
| c. | Archaebacteria and Eubacteria |
| d. | Cannot be determined |
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Answer: (a).Archaebacteria
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| 30. | Cytoplasmic membrane and the cell material bounded by it plus the outer membrane of cell is known as _________ |
| a. | Protoplast |
| b. | Cytoplast |
| c. | Spheroplast |
| d. | Cell membrane |
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Answer: (c).Spheroplast
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