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Flashcards in Viruses Deck (12):
0

Characteristics - 3

No own ribosomes
No permanent membrane
Host needed for protein synthesis

1

Virus particle

Virion

2

Virus protein coat

Capsid

3

Virus+host

Virus replication factory

4

Classification - 7 groups

Baltimore
Double/single DNA
Double RNA
Pos/neg RNA
RNA as DNA (retroviruses)
DNA as RNA (hepatitis)

5

Viral shape

Made of capsomeres
Helical or icosahedral

6

Membranes

Enveloped- released by budding
Non-enveloped - released by lysis
Both have embedded proteins

7

Special adaptations - 2

Syringe-like tail - bacteriophags
Movement proteins - plant viruses

8

Life cycle

Binding - early genes expressed - genome replication - late genes expressed - capsid synthesis - capsomeres assembly - bursting/budding

9

Viral diseases - 15

Hepatitis c
Polio
Herpes
Chickenpox/shingles
Kaposis sarcoma
Epstein-Barr
Smallpox
Cowpox
Influenza
Measles
Mumps
Ebola
Rubella
Dengue
Yellow fever

10

Why influenza mutates

8 different pieces of genome
Two different strains inside 1 organism can recombine

11

Origins hypotheses

Descendants of bacteria (mimiviruses)
Separate evolution
Escaped cellular components