Viruses Flashcards

(11 cards)

1
Q

Viruses

A

They are little more than a few dozen genes surrounded by a protein coat

Not a true cell

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2
Q

What can’t viruses do?

A

Grow, repair themselves, feed, or move on their own

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3
Q

Active viruses

A

Only when they make contact with host cell

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4
Q

Parasites

A

Viruses are parasites because they take over the host cell to make more copies of themselves

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5
Q

Lytic cycle

A

Viruses enter host cell and tricks it into making new virus particles

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6
Q

Lysogenic cycle

A

Viral genes enter host cell, but do not reproduce right away.
They insert themselves into host cell’s chromosomes.

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7
Q

Prophage

A

Viral genes

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8
Q

Viral diseases 1

A
  1. Sexually transmitted infections
    Human Immunodeficiency virus (HIV)
    Herpes
    Human Papilloma virus (genital warts)
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9
Q

Viral diseases 2

A

Other viral infections

Cold, flu, West Nile virus, rabies, yellow fever, Ebola, Hepatitis (A,B,C)

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10
Q

Viral infections 3

A

Some viruses linked to cancer
Human Papilloma virus (HPV) is leading cause of cervical cancer
Hepatitis is cause of liver cancer

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11
Q

Viral specificity

A

Refers to what hosts the virus is capable of infecting. Most viruses are specific to only 1 or few types of cells.
Eg. Cold virus only infects cells found lining respiratory track.
Ravies can affect any mammal

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