what is the cycle of infection in which more virsues are produced and the host cell is destroyed?

Question

Sorry more science homework ?'s

Can you belive this is 7th grade homework??

Answer 1

Lytic Cycle: Life cycle of virulent phages.
1. The phage lands on the host cell, and using 140 ATP's in its tail fibers, injects its nucleic acid core into the bacterium.

2. The host's DNA is cut up and destroyed by the enzymes produced by the host from the new DNA.

3. The now unassembled nucleotides are reassembles into phage DNA, which produces copies of the capsid.

4. The genes also produce the enzyme lysozyme, that digests the bacterial cell wall, causing the newly assembled viruses to escape.

Lysogenic Cycle: Viruses that reproduce without killing their hosts are called temperate viruses. These viruses have 2 alternate forms of reproduction. The lytic cycle or the lysogenic cycle. The process begins very similar to the lytic infection or inserting the genome into the host's genome and becoming dormant. During the lysogenic cycle one of the temperate phage's genes remains active. It codes for a repressor protein keeping the prophage genes inactive. From here on the cells reproduce regularly. Each carrying the hidden genes of the virus. Under normal circumstances harmless bacteria remain so until infected by these viruses; then they can become pathogenic. Example Botulism, diphtheria, and scarlet fever bacteria.

Answer 2

There are two cycles of viral replication. Lysogeny and lysis. Since you mentionned 'host cell destroyed' (aka lysis), it would be the Lytic cycle you are discussing.