Concept explainers
To explain:
The differences between the given curves.
Introduction:
Viruses grows and multiplies by two of its cycles called the lytic and the lysogenic cycle. They have some major difference. In a lytic cycle the virus infects a bacteria or any cell and as its number increases and as the virus copies grow in the cell then at the time of release they lyse the host cell and comes out.
In the case of lysogenic cycle the viral genome get integrates in the host’s genome and it continues to multiply the viral DNA doesn’t encounter any unfavorable condition. At the time of unfavorable condition it goes into the lytic cycle and comes out and infects the other cell.
Graphical representation:
Fig.1: Graphs showing the comparison in the number of viral and the bacterial cells after infection.
Want to see the full answer?
Check out a sample textbook solutionChapter 17 Solutions
Campbell Biology in Focus (2nd Edition)
- Which of the processes of information transfer illustrated in Figure are required for the T2 phage reproduction illustrated in Figure ?arrow_forwardO O O A new virus is discovered. Its RNA genome encodes several proteins, including a reverse transcriptase enzyme. What can you conclude about replication of this virus? Its replication involves a double-stranded RNA intermediate Its replication involves a DNA copy of its genome Its replication depends entirely on cellular enzymes Its replication is entirely independent of cellular enzymes 00 A deficiency in Base Excision Repair (BER) would primarily sensitize you to mutations caused by radiation, X-rays O Chemicals in smoke, and UV radiation O Unavoidable, spontaneously occurring DNA damagearrow_forwardA bacterium is exposed to a drug that inhibits the N protein. Whatwould you expect to happen if the bacterium was later infected byphage λ? Would phage λ follow the lytic cycle, the lysogenic cycle,or neither? Explain your answer.arrow_forward
- Briefly describe the two approaches a bacteriophagecan take to trigger an infection once inside its host cell.arrow_forwardViruses are host-specific, meaning they can only infect specific types of host organisms. For examble, the adenovirus is responsible for the common cold in humans but your dog can't catch a cold from you. Why is this? The proteins on the virus surface can only bind with proteins on the correct host surface. It is an enveloped or non-enveloped virus. The enzymes carried by the virus are compatible with the host. The genome of the virus is made of DNA or RNA.arrow_forwardViruses replicate by entering a cell and using the host cell's enzymes to produce more copies of itself. SARS-COV2 is a spherical virus that has been observed to be as small as 50 nm in diameter. If we approximate a human epithelial cell to be a cylinder with a 58 um height and 5 um diameter, what is the maximum number of SARS-COV2 viruses that could fit inside the cell?arrow_forward
- In the lysogenic cycle of bacteriophages, which of the fol-lowing is true?(a) Lysogeny is the term applied to a temperate phage thatdoes not replicate itself independently and does not lysethe bacterial host cell.(b) Phage DNA is incorporated into the host bacterium’sDNA, at which time it is called a prophage.(c) Temperate phages can be replicated either as a pro-phage along with bacterial chromosomal replicationor can suddenly revert to the lytic cycle by replicatingthemselves and assembling into new phages.(d) All the above are true.(e) a and c only.arrow_forwardA virus that has which type of genome must carry replicase within the viral particle? (choose all that apply) ds DNA ss (+) DNA ss (–) DNA ss (+) RNA ss (–) RNA Which viral type has a genome that can be directly translated? (choose all that apply) ds DNA ss (+) DNA ss (–) DNA ss (+) RNA ss (–) RNAarrow_forwardIn some viruses the flow of information is in reverse that is ,from RNA to DNA.can you suggest a simple name to the process?arrow_forward
- Viruses that infect bacterial cells do not infect human cells, and viruses that infect human cells do not infect bacterial cells. Explain why this should be the case.arrow_forwardWhy must ( 2 ) strand but not ( 1 ) strand RNA viruses bring their own replicase into a cell?arrow_forwardAccording to Philip Bell’s viral eukaryogenesis hypothesis, genes for the glycolytic pathway, theKrebs cycle, electron transport, and oxidative phosphorylation were all provided by:A. an endosymbiotic gram-negative eubacteriumB. an endosymbiotic archaeobacteriumC. a gram-positive eubacterial host cellD. a double-stranded DNA virusE. an archaeobacterial host cellarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College