Viruses Chp38

Question 1

What is the structure of a virus

Answer 1

nucleic acid (DNA or RNA) enclosed in a protein coat (capsid)

Question 2

Are viruses living or non-living

Answer 2

living: contain genetic material, have protein coat, can replicate. Non-living: non-cellular, cant reproduce by themselves, no cell organelles, on one type of nucleic acid

Question 3

What are the different shapes of viruses

Answer 3

round, rod-shaped, complex

Question 4

What is a bacteriophage

Answer 4

a virus that infects bacteria

Question 5

What are the stages in viral replication

Answer 5

attachment, entry (inject nucleic acid in or whole virus moves in), synthesis (virus replicates), assembly, release

Question 6

What is the medical and economic importance of viruses: disadvantages

Answer 6

human diseases, plant diseases, animal diseases

Question 7

What is the medical and economic importance of viruses: benefits

Answer 7

genetic engineering, control infections

Question 8

Examples of a harmful virus

Answer 8

AIDS, tobacco mosaic

Question 9

Example of a beneficial virus

Answer 9

bacteriophages