Viruses

Question 1

Why is a virus being alive questionable?

Answer 1

Not alive: Cannot reproduce or metabolize on on

Yes: Bio molecules, genetic material, can evolve

Question 2

General virus build?

Answer 2

Infectious nucleic acid (double strand or single strand, DNA or RNA) .
Enclosed in a protein coat. (Caspid)
Maybe membranous envelope (derived from host).

Question 3

The protein shell covering a virus is called..

Answer 3

Caspid

Question 4

Viruses that infect bacteria long and short name

Answer 4

Bacteriophages
Phages

Question 5

Host range meaning

Answer 5

Tue range of hosts a virus can infect.

Question 6

What is viral DNA called when hidden into another cells DNA?

Answer 6

Prophage

Question 7

Lytic Cycle

Answer 7

Virus infiltrates cell, makes more virus parts, lyses cell and spreads

Question 8

Lysogenic Cycle

Answer 8

Virus infiltrates cell but stays dormant as the cell divides

Question 9

What is a virulent phage?

Answer 9

A virus who only uses the lytic cycle

Question 10

What is a temperate phage?

Answer 10

A virus that can use both Lytic and Lysogenic Cycles

Question 11

Basic cycle of Virus reproduction

Answer 11

Virus infiltrates cell, host replicates viral genes and uses viral genome and ribosomes to make caspids, viral genome and caspids self-assemble, viruses leave cell

Question 12

Why did viruses likely evolve after cells?

Answer 12

They depend on cells for survival

Question 13

Who are the candidates for the evolution into viruses?

Answer 13

Plasmids: Circular DNA in bacteria and yeasts, sometimes move between cells, can self replicate
Transpons: DNA that can move to different spots in a cell’s genome