course assessment id-1122879 1&course; id-1524797 1&content; d-34532927 18estepz
ID: 200362 • Letter: C
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course assessment id-1122879 1&course; id-1524797 1&content; d-34532927 18estepzna Question Completion Status: Moving to the next question prevents changes to this answer Question 1 2 P ial features does not present structures from which the tail nbers of T4 bactenophage can access Plasma membrane Bacterial capsule e Lipopolysacchande layer peptidoglycan layer O Endospore coat protein Moving to the next question prevents changes to this answer history mdocx Road Not Taker, L..do.. ^ Week 3 HST 102 ".docx ^ OSHIBA SPACE ENTERExplanation / Answer
Ans. Last option -- Endospore coat protein.
Reason-- The bacteriophage uses its long tail fibres to bind to the lipopolysaccharide layer on the surface of the bacteria. A recognition signal is sent through the long tail fibers to the base plate on the virus. This unravels the short tail fibres that bind irreversibly to the bacterial cell surface. The baseplate changes conformation and the tail sheath contracts, causing GP5 at the end of the tail tube to puncture the outer membrane of the cell.
The lysosome domain of GP5 is activated and degrades the periplasmic peptidoglycan layer. After the remaining part of the membrane is degraded, the bacterial DNA travels through the tail tube and enters the bacterium.
Endospore formation is a survival strategy of bacteria. It is a complex development process by which a dormant and highly resistant cover is formed around the cell to protect its genetic material. Endospores can survive extremes of temperature, high UV radiations, chemical damage, nutrient deficiency and even enzymatic destruction.
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