Questions lab 2

Question 1

In case of haemagglutination, what is the red blood cell agglutinated by?

Answer 1

By the virus

Question 2

What is the case of haemadsorption?

Answer 2

The virus induces proteins on cell, attaching red blood cells

Question 3

If the virus loses its inefectivity after chloroform treatment, then it is..?

Answer 3

An enveloped virus

Question 4

If the virus is treated will chloroform and continues to grow in the cell culture it is?

Answer 4

Non-enveloped

Question 5

If the virus is colored greenish/yellowish after acridinorange treatment it is?

Answer 5

Double stranded

Question 6

If a virus does not cause CPE..?

Answer 6

It cannot be investigated in cell cultures

Question 7

The haemagglutination titer is..?

Answer 7

The last dilution where haemagglutination is observed

Question 8

Acridine orange turns..

Answer 8

reddish/orange with nucleic acids

Question 9

We can observe synctytium in..?

Answer 9

Both stained and non stained cells

Question 10

Inclusion bodies are formed by?

Answer 10

Both DNA and RNA viruses

Question 11

In immunoperoxidase test..?

Answer 11

The peroxide is added, attached to the antibody or to the virus

Question 12

What kind of viruses is stopped with deoxyuridine?

Answer 12

DNA viruses only

Question 13

Plaque is..?

Answer 13

CPE in the monolayer

Question 14

Lumpy cell nucleus are a result of?

Answer 14

Chromatin conglomerulate

Question 15

What is an HA unit?

Answer 15

The last hemagglutination titer

Question 16

Does CPE have diagnostic value?

Answer 16

Sometimes, but not pathogenic.