MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 |
| Answer» B. outer membrane and capsule | |
| 2. |
Which of the following are present in teichoic acids? |
| A. | ribitol residues |
| B. | glycerol residues |
| C. | glucose residues |
| D. | ribitol or glycerol residues |
| Answer» E. | |
| 3. |
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 |
| Answer» C. Porin proteins | |
| 4. |
NAG and NAM of peptidoglycan layer is linked by _________ |
| A. | beta-(1,4) glycosidic linkage |
| B. | alpha-(1,4) glycosidic linkage |
| C. | alpha-(1,6) glycosidic linkage |
| D. | beta-(1,6) glycosidic linkage |
| Answer» B. alpha-(1,4) glycosidic linkage | |
| 5. |
Porins are special proteins act as channels in the outer membrane of Gram-negative bacteria. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
The outer membrane of the Gram-negative cell wall is anchored to the underlying peptidoglycan by means of which of the following? |
| A. | Braun’s Lipoprotein |
| B. | Phospholipids |
| C. | Proteins |
| D. | Lipopolysaccharide |
| Answer» B. Phospholipids | |
| 7. |
Peptidoglycan layer is present in large quantity in? |
| A. | Gram-positive bacteria |
| B. | Gram-negative bacteria |
| C. | Fungi |
| D. | Algae |
| Answer» B. Gram-negative bacteria | |
| 8. |
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 |
| Answer» C. Porin proteins | |
| 9. |
Bayer’s junctions are sites which help in joining which of the following?$# |
| A. | cytoplasmic membrane and outer membrane |
| B. | outer membrane and capsule |
| C. | cytoplasmic membrane and periplasmic space |
| D. | peptidoglycan layer and cytoplasmic membrane |
| Answer» B. outer membrane and capsule | |
| 10. |
Which_of_the_following_are_present_in_teichoic_acids?$ |
| A. | ribitol residues |
| B. | glycerol residues |
| C. | glucose residues |
| D. | ribitol or glycerol residues |
| Answer» E. | |
| 11. |
NAG and NAM of peptidoglycan layer is linked by ________? |
| A. | beta-(1,4) glycosidic linkage |
| B. | alpha-(1,4) glycosidic linkage |
| C. | alpha-(1,6) glycosidic linkage |
| D. | beta-(1,6) glycosidic linkage |
| Answer» B. alpha-(1,4) glycosidic linkage | |
| 12. |
Porins are special proteins act as channels in outer membrane of Gram-negative bacteria. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Which among the following acts as receptors for bacteriophage attachment in Gram-negative bacteria? |
| A. | Cilia |
| B. | O antigens |
| C. | Lipid A |
| D. | Teichoic acid |
| Answer» C. Lipid A | |
| 14. |
The outer membarane of the Gram-negative cell wall is anchored to the underlying peptidoglycan by means of which of the following? |
| A. | Braun’s Lipoprotein |
| B. | Phospholipids |
| C. | Proteins |
| D. | Lipopolysaccharide |
| Answer» B. Phospholipids | |
| 15. |
Cord factor is a ___________ |
| A. | protein |
| B. | teichoic acid derivative |
| C. | mycolic acid derivative |
| D. | carbohydrate |
| Answer» D. carbohydrate | |
| 16. |
Teichoic acid present in Gram-positive bacteria can bind to which ion? |
| A. | Fe ions |
| B. | Phosphorus ions |
| C. | Mg ions |
| D. | Sulphur ions |
| Answer» D. Sulphur ions | |
| 17. |
Peptidoglycan is made up of __________ |
| A. | N-acetylglucosamine |
| B. | N-acetylmuramic acid |
| C. | N-acetylglucosamine, N-acetylmuramic acid |
| D. | N-acetylglucosamine,N-acetylmuramic acid,amino acids |
| Answer» E. | |
| 18. |
Peptidoglycan layer is present in large quantity in? |
| A. | Gram-positive bacteria |
| B. | Gram-negative bacteria |
| C. | Fungi |
| D. | Algae |
| Answer» B. Gram-negative bacteria | |