Question

1. viruses can reproduce using multiple methods. these methods include the lytic and the lysogenic cycle. regardless of the method of reproduction, all viruses require a host cell. the unique adaptation of all viruses is that they can take over the host cells protein making abilities. the virus tricks the host cell into using the virus genetic material instead of its own. the host cell then becomes a virus making factory.

in the lytic cycle, the end result is the host cell is ruptured and killed (example: sars - cov - 2). in the lysogenic cycle, the virus can remain dormant within the host cell. a virus that is in the lysogenic cycle can be reactivated and move into the lytic cycle at any time (example: varicella zoster, the virus that causes chickenpox and later be reactivated into shingles).
why does a virus require a host cell for reproduction? (hint: think about what your cells need to undergo protein synthesis.)

1. why havent scientists been devoting their time to developing an antibiotic treatment for the sars - cov - 2 virus which causes covid - 19?
2. list things that you can do to prevent the spread of bacteria and viruses.

Explanation:

Question 4

Viruses lack cellular structures (like ribosomes, enzymes, or energy - producing mechanisms) needed for protein synthesis and replication. Host cells provide ribosomes, tRNA, amino acids, and energy (e.g., ATP) to transcribe viral DNA into mRNA and translate it into viral proteins. The virus hijacks the host's cellular machinery to replicate its genetic material and assemble new virions.

Antibiotics work by targeting bacterial structures or processes (e.g., cell wall synthesis, bacterial ribosomes). Viruses (like SARS - CoV - 2) are not bacteria; they lack bacterial - specific structures and metabolic pathways. Antibiotics cannot disrupt viral replication as viruses use host cell machinery, so developing antibiotics for a virus is ineffective.

To prevent the spread of bacteria and viruses, practices include handwashing (with soap and water, or using hand sanitizer) to remove pathogens from hands; covering the mouth and nose with a tissue or elbow when coughing/sneezing to prevent airborne transmission; avoiding close contact with sick individuals; regularly cleaning and disinfecting frequently - touched surfaces (like doorknobs, countertops) to kill pathogens; and getting vaccinated (for viruses with available vaccines) to build immunity.

Answer:

A virus requires a host cell for reproduction because viruses are acellular and lack the necessary cellular machinery (such as ribosomes, enzymes, and energy - generating systems) to carry out protein synthesis and replicate their genetic material on their own. The host cell provides the ribosomes, tRNA, amino acids, and energy (like ATP) required for transcribing viral DNA into mRNA and translating mRNA into viral proteins. The virus hijacks the host cell's protein - making and genetic replication capabilities to produce new viral particles.

Question 5