MCB 301 Exam 3 Study Guide with Complete Solutions
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Course
MCB 301
Institution
MCB 301
MCB 301 Exam 3 Study Guide with
Complete Solutions
endospore - Answer️️ -- a bacterial cell specialized for survival
- incapable of cell division
- form via differentiation
- survival and dispersal mechanism for genetic material
- resistant to environmental stresses
- only 10-12% water
...
steps of sporulation - Answer✔️✔️-1. DNA is replicated (same as in binary fission);
nucleoid chills in the middle of the cell
2. cytoplasmic membrane invaginates to form spore septum
3. the cells are now unequal size
4. membrane of the larger cell grows around the smaller, mother engulfs the daughter
cell
5. daughter cell is now surrounded by 2 membranes (forespore); original nucleoid is
degraded.
6. special PG is synthesized between the two membranes, called the cortex. calcium
dipicolinate is deposited to help protect DNA
7. spore coat proteins are deposited around cortex
8. outer forespore membrane is degraded
9. exosporium forms
10. mature spore is released as dormant and can stay that way for years until it finds
the right environment
Is the outer sporefore membrane found in the mature endospore? - Answer✔️✔️-NOPE.
just inner and cortex
cortex - Answer✔️✔️-- forms between inner and outer forespore membranes
- made of special peptidoglycan
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