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.

stay home when you are sick, dont touch everything at store.

Explanation:

Question 4:

Viruses lack cellular structures (like ribosomes, enzymes, and metabolic machinery) needed for protein synthesis and replication. Host cells provide ribosomes, tRNA, amino acids, and energy (e.g., ATP) for the virus to transcribe its genetic material, translate viral proteins, and assemble new virions. The virus hijacks the host’s protein - making (and other cellular) processes to reproduce, as it can’t perform these functions independently.

Antibiotics target bacterial structures or processes (e.g., cell wall synthesis, bacterial ribosomes). Viruses (like SARS - CoV - 2) are acellular, with no bacterial - like structures or metabolic pathways. Antibiotics can’t disrupt viral replication (which involves hijacking host cell machinery), and using them against viruses is ineffective and can lead to antibiotic resistance in bacteria.

• Hygiene Practices: Wash hands with soap and water (or use hand sanitizer) to remove pathogens. Cover mouth/nose with a tissue (or elbow) when coughing/sneezing to prevent airborne transmission.
• Avoidance: Stay home when sick to limit contact with others. Avoid close contact with sick people.
• Environmental Cleaning: Disinfect frequently - touched surfaces (doorknobs, phones) to kill pathogens.
• Vaccination: Get vaccinated (when available) to build immunity against specific viruses (e.g., COVID - 19, influenza).
• Safe Practices: Don't share personal items (e.g., towels, utensils) that can transfer pathogens.

Answer:

Viruses lack the cellular machinery (ribosomes, enzymes, energy sources, etc.) required for protein synthesis and replication. They rely on the host cell's ribosomes, tRNA, amino acids, and metabolic energy to transcribe viral DNA/RNA, translate viral proteins, and assemble new viruses. So, a host cell is needed to provide the necessary components and environment for the virus to reproduce.

Question 5: