Viruses

Question 1

Structural diversity

Answer 1

is often obvious… shark is different from maple tree. This can occur at microscopic level too (multi or uni)

Question 2

Size of eukaryotic and prokaryotic cells

Answer 2

P: 1-10 micrometers
E: 100-1000 micrometers

Question 3

Genetic material for prokaryotic and Eukaryotic cells

Answer 3

P: cellular DNA, no membrane, genome is single chromosome
E: DNA in nucleus, has membrane, genome has several chromosomes

Question 4

Cell Division in Eukaryotic and Prokaryotic cells

Answer 4

P: Binary fission
E: Mitosis + Meiosis

Question 5

Reproduction for Eukaryotic and prokaryotic cells

Answer 5

P: Asexual
E: Sexual

Question 6

Metabolism for prokaryotic and eukaryotic cells

Answer 6

P: Anaerobic - does not need O2 for energy production (cellular respiration)
E: Aerobic - Needs oxygen for energy production (cellular respiration)

Question 7

What is a virus

Answer 7

A virus is a structure that contains RNA or DNA and is surrounded by a protective protein coating (capsid)

Question 8

How to classify a virus

Answer 8

By capsid size and shape

Question 9

4 shapes of a virus

Answer 9

helical, polyhedral, complex, and spherical

Question 10

Are viruses alive

Answer 10

No - they cannot survive outside of their host cell “considered dormant” and its neither eukaryotic or prokaryotic - no cytoplasm, organelles, membranes

Question 11

What are the 2 possible cycles

Answer 11

Lytic and Lysogenic

Question 12

What is the Lytic cycle

Answer 12

Virus takes over host cell machinery to create virus proteins + nucleic acid.
Symptoms during this cycle as it destroys host cell

Question 13

What is the Lysogenic cycle

Answer 13

virus integrates into the host cell DNA and then replicates “provirus” - no symptoms (dormant)

Question 14

Replication pattern

Answer 14

can help explain symptoms in some viruses. In cold sores - appears in the lytic cycle and then is dormant in the lysogenic cycle