HOMEWORK 20.1 VIRUSES

HOMEWORK 20.1 VIRUSES

A particle made of nucleic acid, protein, and in some cases, lipids that can replicate only by infecting living cells F. RNA viruses have shown an ability to evade antiviral drugs. Humans use bacteria in industry, food production, and other ways. If the statement is false, change the underlined word or words to make the statement true. Cell theory wikipedia , lookup. Then, circle the step that shows lysis of the host cell. Explain how viruses cause infection.

Why should meat be cooked until it is well-done? In many viral infections, viruses attack and destroy certain body cells, causing the symptoms of the disease. How may the reproductive methods of viruses help the process? Eventually, the prophage will remove itself from the host cell DNA and make new virus particles. Define emerging disease and explain why emerging diseases are a threat to human health. Prokaryotes that require a constant supply of oxygen to live are called obligate aerobes.

They destroy living cells and tissues directly or by causing an immune response that destroys tissue.

Developmental biology wikipedialookup. Archaea look similar to bacteria, but are genetically closer to eukaryotes.

Antibiotics are compounds that block the growth and reproduction of bacteria. How may the reproductive methods of viruses help the process?

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How could scientists determine whether it should be classified in domain Bacteria or domain Archaea? Although viruses are parasites, they are not made of cells and are not considered living things.

homework 20.1 viruses

Using boiling water to clean dishes Viruses must infect a living cell in order to reproduce. A n noninfectious disease is an unknown disease that appears in a population for the first time.

What are rod-shaped bacteria called? When a bacterial 20.11 does occur, antibiotics can be used to fight the disease. Emerging Diseases An unknown disease that appears in a population for the first viruuses or a well-known disease that suddenly becomes harder to control is called an emerging disease.

Scientists are struggling to keep up with changes.

How are they different? Structure and Function Prokaryotes are identified by characteristics such as shape, the chemical nature of their 20.11 walls, the way they move, and the way they obtain energy. How is the common cold like the HIV virus?

Moody, Alyssa / Chapter 20 – Viruses and Prokaryotes

Classifying Prokaryotes For Questions 1—5, complete each statement by writing the correct word or words. Viruses that infect bacteria are called bacteriophages.

homework 20.1 viruses

Preparation of weakened or killed pathogens or inactivated toxins used to produce immunity I. Scrapie is most likely caused by homewlrk known as viroids. What occurs during conjugation? Viruses that have RNA as their genetic material are called. Thank you for your participation! Oncolytic virus wikipedialookup. Life wikipedialookup.

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homework 20.1 viruses

Whiplike structures on a bacterium that produce homewofk are called A. Antiviral drug wikipedialookup. What is a bacteriophage? They can also exchange genetic information by conjugation.

CHEAT SHEET

Explain the role of bacteria in the living world. Bacterial diseases can be prevented and treated through the following virusee Genetic engineering wikipedialookup. Unicellular organisms that lack a nucleus are called 2. Many bacterial pathogens can be controlled by washing, using disinfectants, preparing and storing food safely, or sterilizing exposed items.

Eventually, the prophage will remove itself from the host cell DNA and make new virus particles. In the case of bacteriophage T4, viral DNA directs the synthesis of new viruses using materials in the cell.