Fig. 13.2a

b) c)

d)

What morphology is this virus?

1.

Fig. 13.3a

b)

c)

e)

What is the morphology of this virus?

d)

2.

Fig. 13.3b

What are the structures projecting from the virus?

Influenzavirus50 nmTEM

3.

Fig. 13.16a

Mastadenovirus SEM

4.

Fig. 13.4a

b)

c)

What is the morphology of this virus?

d)

5.

Fig.13.16b

)

Herpesvirus

TEM

a)

b)

6.

Fig. 13.5a

Sheath

b)

What type of virus is this?

TEM

65 nm

c)

d)

Baseplatee)

7.

Fig. 13.6

Plaques

What are plaques?

8.

Fig. 13.7

Yolk sac

ShellAir sac

Amniotic cavity

Chorioallantoic membrane Chorioallantoic

membraneinoculation

Amniotic inoculation

Allantoic inoculation

Yolk sac inoculation

Shell membrane

Allantoic cavity

Albumin

What process does this figure represent? 9.

Fig. 13.11 Bacterialcell wall

1

Bacterialchromosome

2

3

4

5

Tail

What is this process?

Write the steps and label all of the structures.

10.

Fig. 13.12

What type of viral life cycle is this?

3A

4A

1

Bacterialchromosome

2

3B

OR

What is viral DNA called in this life cycle?

4B

Many celldivisions

5

What type of viral life cycle is this?

Answer the questions, label all of the structures, and write the steps. 11.

Fig. 13.15 1

Papovavirus

4

DNA

Capsid

Host cell

2

3

5

6

7

Write the sequence of events in the replication of all animal

Viruses. Label all of the structures.

Key ConceptAnswer the questions, label all of the structures, and write the steps.

a)

b)

c)

d)e)

What are these?

12.

Fig. 13.17a + strand RNA-containing virus

1

Nucleus

CytoplasmHost cellRNA

2

3

What happens here?__________transcribedfrom + viral genome.

Viralgenome(+ strandRNA)

________ is transcribedfrom the – strand.

Capsidprotein

Viralprotein

ssRNA;+ or sense strand;Picornaviridae

4

+ strand

5

Answer the questions, fill in the blanks,label all of the structures, and write the steps.

At the moment of attachment,the virus is called a ________.

+ strand or – strand?

13.

Fig. 13.17b - strand RNA-containing virus

1

Nucleus

Cytoplasm

Capsid

Host cellRNA

2

3

What happens here?

______________must first be transcribed from the _____ viral genomebefore proteins can be synthesized.

Viralgenome(RNA)

Additional ___ strands aretranscribed from mRNA.

Capsidprotein

Viralprotein

ssRNA; – orantisense strand;Rhabdoviridae

4

_______areincorporatedinto capsid

5

Answer the questions, fill in the blanks, label all of the structures, and write the steps.

+ strand or – strand?14.

Fig. 13.17c Double -stranded RNA-containing virus 1

Nucleus

Cytoplasm

Capsid

Host cellRNA

2

3

What happens here?

______ is produced inside thecapsid and released into thecytoplasm of the host.

Viralgenome(RNA)

Capsid proteins and _________________polymerase

Viralprotein

dsRNA; + or sensestrand with – or antisense strand; Reoviridae

4

5

RNA polymerase initiates production_____. The ______ and ___ strands form thedsRNA that is incorporated as new viral genome.

Answer the questions, fill in the blanks, label all of the structures, and write the steps.

What type of RNA?15.

Fig. 13.19 Multiplication of a retrovirus

7

6

5

4

3

2

1

Identical strandsof RNA

Viralproteins

RNA

b)

a)

DNA of oneof the host cell’schromosomes

Two identical stands of RNA. Are they + or – strands, or both?

Reversetranscriptase

Capsid Envelope

Host cell

Virus

Answer the questions, fill in the blanks,label all of the structures, and write the steps.

c)

d)

What type of genetic material?16.

Fig. 13.20a

What is this form of ‘release’ called?

b)

c)

c)

b)

What is this structure?

Answer the questions andlabel all of the structures.

17.

Clinical Focus (From MMWR)

Avian virus

Bird Pig

Pig infectedwith H1N1

Pig virus

Pig infectedwith __________

Human virus

Human

Human infectedwith H3N2

d)

a)

b)

c)

Avian virus H7N7Transmitted to_____

Wild bird infected withVirus H7N7

Virus H3N2Transmitted to_____

Fill in the blanks, label a-d, and answer the question

How is this illustration an example of ‘antigenic shift’.

18.