viruses

Question 1

why are viruses not under the five kingdoms

Answer 1

-they have non living particles and living organisms

Question 2

what are the characteristics of life

Answer 2

M- movement
R- respiration
S- stimuli (response)
G- growth
R-reproduction
E- excretion
N- nutrition

Question 3

why are viruses generally not considered living

Answer 3

-they display reproduction in a living cell

Question 4

what’s the only characteristic of life seen in viruses

Answer 4

reproduction

Question 5

what are viruses

Answer 5

they are acellular, can’t be classified as a prokaryote or eukaryote

Question 6

what’s the basic structure of viruses

Answer 6

-very small (20nm - 450nm)
-has a central nucleic acid (either DNA OR RNA) surrounded by a protein capsule
-viruses can infect plants, animals or bacterial cells
-some viruses are enclosed by a sheath of lipid and protein molecules

Question 7

what are the shapes of viruses

Answer 7

TMV virus (rod shaped)
adeno virus (spherical)
bacteriophage (complex)
:head sheath and tail

Question 8

what’s a bacteriophage

Answer 8

it’s a virus that infects a bacterial cell

Question 9

viruses are ________ that only reproduce with in ______ cells and are known as _______ __________ ________

Answer 9

-parasites
-living cells
-obligate intracellular parasites

Question 10

explain obligate intracellular parasites

Answer 10

they cannot multiply without infecting living cells or hosts
obligate- compulsory
intracellular- within a cell
parasite- an organism that lives on living material (cells) and causes harm

Question 11

what are the general characteristics of viruses

Answer 11

-they’re host specific and some are tissue specific
-they pathogens (cause disease in plants and animals)
-they reproduce by converting genetic material (DNA OR RNA) of the host cells into a viral nucleic acids so new viruses are produced