Understanding Viruses

The video explores viruses as non-cellular infectious agents, discussing their classification as living or non-living. It covers virus structures, including shapes like helical and polyhedral, and features such as the genome, capsid, and envelope. The video explains how viruses replicate using host cells and details the types of nucleic acids they possess. It also highlights the role of glycoproteins and enzymes in viral functions. The video concludes with a summary of the virus structure and a call to subscribe to the channel.

What is the primary debate regarding the classification of viruses?

• Whether they have a genome or not

• Whether they can infect plants or animals

• Whether they are cellular or non-cellular

• Whether they are living or non-living

Which of the following is NOT a shape that viruses can take?

• Polyhedral

• Spherical

• Helical

• Cuboidal

What is the main function of a virus?

• To produce energy

• To destroy host cells

• To replicate its genome

• To create new cells

How are viruses often classified?

• By their size

• By their color

• By their shape

• By the type of nucleic acid

What is the protective protein coat of a virus called?

• Capsid

• Envelope

• Genome

• Membrane

What is the source of the lipid envelope in some viruses?

• Capsid proteins

• Host cell membrane

• External environment

• Viral genome

What role do glycoproteins play in some viruses?

• They encode the viral genome

• They assist in viral replication

• They facilitate binding to host cells

• They protect the viral capsid

Which enzyme is found in retroviruses?

• Reverse transcriptase

• Protease

• DNA polymerase

• RNA polymerase

What is the overall structure of a virus described as?

• Complex and ineffective

• Simple and ineffective

• Simple but effective

• Large and complex

What do the genetic material and protein coat of a virus enable it to do?

• Enter host cells and replicate

• Destroy host cells immediately

• Create new viruses independently

• Produce energy