SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the spacecraft shaped virus attatches to the host cell then leaves
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the spacecraft virus kills the host cell
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the spacecraft virus attatches to the host cell injects DNA as the virus leaves it kills the host cell
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the spacecraft shaped virus attatches to the host cells and as it leaves it kills the host cell
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Detailed explanation-1: -In the lytic cycle, the virus attaches to the host cell and injects its DNA. Using the host’s cellular metabolism, the viral DNA begins to replicate and form proteins. Then fully formed viruses assemble. These viruses break, or lyse, the cell and spread to other cells to continue the cycle.
Detailed explanation-2: -Lytic cycle Entry: The phage injects its double-stranded DNA genome into the cytoplasm of the bacterium. DNA copying and protein synthesis: Phage DNA is copied, and phage genes are expressed to make proteins, such as capsid proteins.
Detailed explanation-3: -In a lytic cycle, the virus introduces its genome into a host cell and initiates replication by hijacking the host’s cellular machinery to make new copies of the virus. Once infection is complete, the newly replicated and assembled virus particles are released through lysis of the host cell into the surrounding waters.
Detailed explanation-4: -What happens to the host bacteria’s DNA after the bacteriophage injects its DNA/RNA into the cell? It puts the viruses DNA into the cells own DNA. The bacteria pass this “combined” DNA on to the daughter cells. The bacteria continue to reproduce and finally enter the lytic cycle when this happens.
Detailed explanation-5: -In the lytic cycle, the phage replicates and lyses the host cell. In the lysogenic cycle, phage DNA is incorporated into the host genome, where it is passed on to subsequent generations. Environmental stressors such as starvation or exposure to toxic chemicals may cause the prophage to excise and enter the lytic cycle.