Functions and Structures of Viruses and Bacteria

The video tutorial by Amoeba Sisters explains the differences between bacterial capsules and virus capsids. Bacterial capsules, made of polysaccharides, help bacteria adhere to surfaces and protect them from threats like macrophages and dehydration. In contrast, virus capsids are protein coats that protect viral genetic material and can vary in shape, aiding in virus classification. Some viruses also have an envelope that assists in binding to host cells.

What are bacterial capsules primarily composed of?

• Nucleic acids

• Polysaccharides

• Lipids

• Proteins

Which of the following is a function of bacterial capsules?

• To replicate viral DNA

• To help bacteria stick to surfaces

• To produce energy

• To synthesize proteins

What is the primary function of a virus capsid?

• To help the virus move

• To protect the virus's genetic material

• To provide energy

• To replicate the virus

How can viruses be classified based on their capsid?

• By their color

• By their size

• By their shape

• By their weight

What additional structure do many viruses have besides a capsid?

• A chloroplast

• A cell wall

• An envelope

• A nucleus