Exploring the World of Viruses

The video explains the common cold, caused by viruses, and why antibiotics are ineffective against them. It describes the structure of viruses, highlighting their genetic material and protein coat. The video covers viral reproduction through the lytic and lysogenic cycles, emphasizing the specificity of viruses to host cells. It discusses the health impact of viruses like HIV and their rapid mutation. Finally, it explores positive uses of viruses in gene therapy and agriculture, while cautioning about ecological impacts.

Why can't the common cold be treated with antibiotics?

• Because the cold is a genetic disorder.

• Because the cold is caused by bacteria.

• Because the cold is caused by viruses.

• Because antibiotics are ineffective against any illness.

What is a key structural component that all viruses have?

• Cell membrane

• Nucleus

• Mitochondria

• Genetic material

What is the function of a capsid in a virus?

• To replicate the virus

• To produce energy

• To protect the genetic material

• To help the virus move

Which type of genetic material can be found in viruses?

• Both DNA and RNA

• Neither DNA nor RNA

• Only RNA

• Only DNA

What happens to the host cell during the lytic cycle?

• It ruptures and releases new viruses

• It becomes stronger

• It remains unaffected

• It divides rapidly

What is a bacteriophage?

• A virus that infects bacteria

• A virus that infects animals

• A virus that infects fungi

• A virus that infects plants

During the lysogenic cycle, where does the viral genetic material remain?

• In the host cell's mitochondria

• In the host cell's cytoplasm

• In the host cell's DNA

• In the host cell's membrane

What can trigger a virus in the lysogenic cycle to enter the lytic cycle?

• Presence of antibiotics

• Excessive heat

• Environmental or chemical triggers

• Lack of nutrients

Why is HIV particularly difficult to treat?

• It does not affect humans

• It mutates quickly

• It is resistant to all medications

• It only affects animals

How are viruses being used positively in scientific research?

• To create new bacteria

• To increase crop yield

• To develop new antibiotics

• In gene therapy and pest control