A. Lysis of the host cell
B. Injection of phage DNA
C. Synthesis and assembly of phage components
D. Adsorption of the phage
E. Degradation of host DNA
Choose the correct answer from the options given below :
The question pertains to the life cycle of phage T4, a type of bacteriophage that infects E. coli bacteria. The correct sequence of events in the life cycle of phage T4 is crucial in understanding how it infects its host, replicates, and eventually releases new viral particles. Let's break down the steps in the correct order:
- Adsorption of the phage (D): The first step in the infection cycle is the adsorption of the phage onto the surface of the host bacterium. The phage recognizes and binds to specific receptors on the host cell's surface.
- Injection of phage DNA (B): After successful adsorption, the phage injects its DNA into the host cell through the cell wall and membrane, leaving the protein coat outside.
- Degradation of host DNA (E): Once inside, the phage DNA begins to degrade the host bacterium's DNA, effectively taking control of the cell's machinery for its own replication.
- Synthesis and assembly of phage components (C): The phage DNA uses the host's cellular machinery to synthesize phage components such as protein capsids and tails, along with replicating its DNA. These components are then assembled into mature virus particles.
- Lysis of the host cell (A): The final step involves the lysis of the host cell, a process where the cell wall is broken down, releasing newly assembled phages to infect other cells.
Therefore, the correct sequence of the life cycle is D, B, E, C, A. Each step logically follows the previous one, ensuring the continuity of the infection cycle.
Similar Questions
- Arrange the following steps of crossing over in correct order :
A. Pachytene stage
B. Synapsis of homologous chromosomes
C. Separation of homologous chromosomes
D. Breakage and reunion of chromatids
E. Formation of chiasmata
Choose the correct answer from the options given below : - Arrange the following steps in lac operon induction in correct order :
A. Formation of mRNA
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C. RNA polymerase binds to promoter
D. Transcription of structural genes
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Choose the correct answer from the options given below : - Arrange the steps in southern blotting in correct order :
A. Transfer of DNA to nitrocellulose membrane
B. Detection of hybridized probe
C. Restriction digestion of DNA
D. Hybridization with labelled probe
E. Gel electrophoresis
Choose the correct answer from the options given below : - Arrange the steps of endospore formation in correct order :
A. Cortex and spore coat formation
B. Maturation and release of endospore
C. DNA replication and axial filament formation
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Choose the correct answer from the options given below : - Arrange the steps in antigen processing by endocytic pathway in correct order :
A. Recognition by CD4+ T cells
B. Antigen uptake by APC
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Choose the correct answer from the options given below : - Arrange the steps of agarose gel electrophoresis in correct order :
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Choose the correct answer from the options given below : - Arrange the following centrifugal speeds in an order to be used when a cell homogenate is to be separated into various fractions.
A. 1000 g
B. 80,000 g
C. 1,50,000 g
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E. 60,000 g
Choose the correct answer from the options given below : - Arrange the components of photosynthetic machinery of purple bacteria in a sequence followed for flow of electrons :
A. Quinone
B. P870
C. Cyt bC1 complex
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Choose the correct answer from the options given below : - Arrange the steps in cloning and expressing a gene in correct order :
A. Introduction of recombinant molecule into new host that expresses the gene
B. Use of restriction enzymes or PCR to generate fragments of DNA
C. Protein purification
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E. Generation of a recombinant molecule by inserting DNA fragments into vectors
Choose the correct answer from the options given below :
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
