Micro-virology

Question 1

What is the definition of viruses

Answer 1

Viruses are intracellular pathogens that can only lived insid the host cells

Question 2

Why virus cannot lives outside host cell

Answer 2

Becase it not has mechinery for self replication

Question 3

Infectious particals of virus called

Answer 3

Virions

Question 4

What is the definition of virion

Answer 4

Virion is a complete virus particle that can infect living tissue

Question 5

What is the composition of virion

Answer 5

Virion composed of genome that incasced in protein coat and may or may not have envelop

Question 6

Why antibiotices not effact on viruses?

Answer 6

Because the structure of viruse different from that bacteria and viruse not has cell wall ;peptidoglycan and other protein that antibiotics attack it

Question 7

What definition of capsid?

Answer 7

Capsid is protein coat or shell that surround the nucleic acid genom

Question 8

What is the function of capsid

Answer 8

1-sere as protective layer

2-give the shape of virus

Question 9

Capsomeres are

Answer 9

Are projections from the capsid that seen in electron microscope and represent clusters of lipopeptide

Question 10

What is the deffenition of DIFECTED VIRUS

Answer 10

Is avirus particles that functionally deficientin some aspect of replication

Question 11

What is the definition of envelope

Answer 11

Is a lipid-containing membern surround some of virus particles ;it is acquire in viral matchoration by budding process through cellurar membern

Question 12

The projection that exposed from envelop called

Answer 12

Peplomeres

Question 13

Nucleiocapsid define as

Answer 13

Protein - nucleic acid complex that represent the packeged form of virus genome

Question 14

Pseudovirions define as

Answer 14

It is particles that contain host DNA of viral DNA
and composed
When host DNA fragmented during infection and pieces of(dna) incorporated within the capsed protein

Question 15

Pseudovirions can infect cells but cannot replicate

Answer 15

YES👍❤️

Question 16

WHAT IS THE DEFINITION OF viroide

Answer 16

It if virus particle that only contain single molecule of circuler RNA without protein coat or envelop

Question 17

Which cause plant diseas and no cause human diseases

Answer 17

Viroide

Question 18

What is the definition of prions

Answer 18

Are the infectious particles that composed solely of protein (no have nucleic acid

Question 19

What is the range of viral size

Answer 19

From 20to 300 nm in diameter

Question 20

What is the largest and smalkes virus

Answer 20

The smallest virus is pliovirus

And the largest virous is poxvirus

Question 21

Virus genome+protein coat+virus - encoded enzyme =

Answer 21

Naked virus

Question 22

Virus genome +protein coat +virus - encoded enzyme +host membrane with virus encoded glycoproteins =

Answer 22

Enveloped virus

Question 23

Viruses are classified based on

Answer 23

1-type of genome(DNA;RNA;ds;ss;liner or circuler ;segmented or nonsegmented ;+senseor - sense
2-type of capsid(icosahedral ;helical;complex)
3-precense or abcense of envelope

Question 24

Viruses are seperated into major groping called familieson the bases of

Answer 24

1-virion morphology
2-genomic structure
3-strategies of replication

Question 25

Virus family have saffex-viridea

Answer 25

YES 😸💪

Question 26

Subfamily that called generea devided based on

Answer 26

-biologic ;seriologic;physiochemical;genomic diffrences

Question 27

Genus names carry the suffex-

Answer 27

Virus