Biology TEKS 5.D - Viruses

A non-living infectious agent that is composed of genetic material (DNA or RNA) inside a Protein Coat.

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TX.112.42.C.5.D.

All viruses are different, but what are two parts that a virus must have?

• Genetic Information (DNA or RNA)

• a lipid membrane

• a nucleus

• a protein coat

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TX.112.42.C.5.D.

Viruses are considered tiny, non-living infectious agents. Viruses are not ________.

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TX.112.42.C.5.D.

Categorize the characteristics of life from Viruses and Cells.

Groups:

(a) Viruses

,

(b) Kingdoms of Life

• Living Organisms

• Respond to the Environment

• Cannot achieve Homeostasis

• Are NOT made of Cells

• Cannot Grow and Develop

• Don't need a HOST to Reproduce

• Need a HOST to Reproduce

• Homeostasis

• Cannot Metabolize Energy

• Responding to the Environment is not possible

• Non-Living Agents

• Metabolizes Energy

• Can Grow and Develop

• Are made of Cells

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TX.112.42.C.5.D.

Label the correct parts of the Virus in the picture.

a

b

c

Protein Coat (Protection)

DNA (Genetic Info)

Tail Fibers (Attachment)

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TX.112.42.C.5.D.

Viruses cannot reproduce by themselves. What do viruses need to reproduce?

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TX.112.42.C.5.D.

The projections on the surface of this virus help the virus with -

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TX.112.42.C.5.D.

The bacteriophage is made of several parts:

This part is considered the genetic information - ​ ​ (a)  

The virus protects the DNA with this part - ​ ​ ​ (b)  

This part is used by the virus to attach to a cell - ​ (c)  

• a
• b
• c
• d
• e

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TX.112.42.C.5.D.

When a virus invades a living cell, its ​ (a)  
takes over the cell's functions.

• protein coat
• genetic material
• receptors
• tail fibers

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TX.112.42.C.5.D.

What part of the viruses serves as the protection for the viral genetic information?

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TX.112.42.C.5.D.