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Questions and Answers
What is the correct order of stages in bacteriophage replication?
What is the correct order of stages in bacteriophage replication?
What characterizes the lysogenic cycle of bacteriophages?
What characterizes the lysogenic cycle of bacteriophages?
Which option correctly describes the main difference between Orthomyxoviruses and Herpesviruses?
Which option correctly describes the main difference between Orthomyxoviruses and Herpesviruses?
What occurs in the lysogenic cycle if the synthesis phase is interrupted?
What occurs in the lysogenic cycle if the synthesis phase is interrupted?
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In the classification of viruses, where do picornaviruses and adenoviruses belong?
In the classification of viruses, where do picornaviruses and adenoviruses belong?
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How does viral mutation impact the replication process?
How does viral mutation impact the replication process?
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What significant event occurred in the 1935 study of the Tobacco Mosaic Virus (TMV)?
What significant event occurred in the 1935 study of the Tobacco Mosaic Virus (TMV)?
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What replication processes typically occur at the locations labeled P and Q in a viral diagram?
What replication processes typically occur at the locations labeled P and Q in a viral diagram?
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Study Notes
Bacteriophage Replication
- The correct sequence of stages in bacteriophage replication is: Penetration - Adsorption - Replication - Assembly - Lysis.
- This order involves the initial entry of the phage into the host cell, attachment to the cell's surface, replication of phage DNA, assembly of new viral particles, and finally, the lysis of the host cell, releasing new phages.
Lysogenic Cycle
- The lysogenic cycle of bacteriophages involves the integration of the phage's DNA into the host cell's genome, forming a prophage.
- The prophage replicates along with the host cell's DNA, and the phage remains dormant.
- The host cell continues its normal functions without showing any signs of infection.
Viral Taxonomy
- Orthomyxoviruses are riboviruses, meaning their genetic material is RNA.
- Herpesviruses are deoxyriboviruses, meaning their genetic material is DNA.
- This difference in genetic material is a key feature in their classification.
Viral Mutation and Replication
- Mutations in viral genes can alter the viral replication process in various ways.
- Mutations can affect the ability of the virus to attach to host cells, replicate its genome, assemble new viral particles, or escape the host's immune system.
- These mutations can lead to changes in viral infectivity, pathogenicity, and drug resistance.
Tobacco Mosaic Virus Study
- In 1935, a study on Tobacco Mosaic Virus (TMV) showed that the virus could be transferred between plants.
- This study demonstrated that the virus, not its host plant, was the primary cause of the mosaic disease observed in tobacco plants.
- This experiment was significant in advancing our understanding of viruses and their role in disease transmission.
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Description
Explore the key stages in bacteriophage replication, including penetration, replication, and assembly. Additionally, learn about the lysogenic cycle of bacteriophages and the classification of various viral families based on their genetic material.
