Understanding Viruses

The video tutorial, led by Professor Ariane Lopes, introduces 7th-grade students to the topic of viruses. It covers the basic characteristics of viruses, highlighting their acellular nature and lack of metabolism. The tutorial explains how viruses replicate by invading host cells, acting as obligatory intracellular parasites. The process of viral replication and its impact on host cells, leading to diseases like the flu, is discussed. The video concludes with a recap of the key points covered.

What is a common illness caused by viruses?

• Flu

• Chickenpox

• Malaria

• Cold

Which of the following is NOT a characteristic of viruses?

• Protein capsule

• Metabolism

• Genetic material

• Acellular

What is the outer layer of a virus called?

• Cell wall

• Protein capsule

• Lipid membrane

• Nucleus

Where do viruses replicate?

• Inside host cells

• In the bloodstream

• On surfaces

• In the air

What term describes viruses due to their replication method?

• Free-living organisms

• Obligatory intracellular parasites

• Independent entities

• Symbiotic organisms

What happens to a host cell after viral replication?

• It becomes stronger

• It remains unchanged

• It divides

• It is damaged and may die

What process do host cells use that viruses exploit for replication?

• Meiosis and mitosis

• Fermentation

• Respiration

• Photosynthesis

What is released when a virus breaks out of a host cell?

• Antibodies

• Nutrients

• New viruses

• Enzymes

What is the result of viral replication on the host organism?

• No effect

• Cell regeneration

• Viral diseases

• Increased immunity

Which of the following is an example of a viral disease?

• Arthritis

• Flu

• Asthma

• Diabetes