Discussion
Capsule of Bacillus anthracis is formed of:
Answer: C
Correct answer: Polypeptide
The capsule of Bacillus anthracis is a polymer of D-glutamic acid, and it is almost unique among bacterial capsules in being a polypeptide rather than a polysaccharide. Because it is made of the D-isomer it is poorly immunogenic and resists digestion by host proteases, and it protects the organism from phagocytosis. Its genes lie on the plasmid pXO2, separate from the toxin genes on pXO1; a strain losing pXO2 loses its capsule and much of its virulence, which is the basis of the Sterne vaccine strain.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development