Lecture 1 Flashcards
Which statement does not describe the structure of a virus?
Viruses are not living organisms, they do have RNA or DNA nucleic acid core
Why are viruses not considered living organisms? (know the information we discussed on viral replication)
they don’t have a cell membrane and they cant reproduce on their own
Most viruses have an overall structure that is either ___ (rod-like or threadlike) or _______ (a roughly spherical shape). Fill in the blanks.
Helical
isometric
The suitable cells for a particular virus are collectively referred to as its _________.
Host range
What is a bacteriophage?
Virus that only affect bacteria
What is the difference between a T-3/7 or a T-even bacteriophage?
T-3/7 phage - have short tail
T-even phage- a long tail and a very complex base plate
According to the video The Deadliest Being on the Planet Earth – The Bacteriophage, what percent of ocean bacteria are killed by phages every day?
40%
According to the video The Deadliest Being on the Planet Earth – The Bacteriophage, do bacteriophages have specific hosts?
Usually they choose a specific bacteria and maybe one of its close relatives as its host
According to the video The Deadliest Being on the Planet Earth – The Bacteriophage, by what year is it estimated superbugs will kill more people than cancer? How many people are killed by antibiotic resistant bacteria every year approximately?
- By 2050
- 23,000 people
According to the video The Deadliest Being on the Planet Earth – The Bacteriophage, why are we now injecting ourselves with certain viruses? Can bacteriophages hurt your cells?
We can inject them into our bodies to help cure infections. No they can not hurt your cells only bacteria
According to the video The Deadliest Being on the Planet Earth – The Bacteriophage, how was a bacteriophage recently used to cure a disease?
Pseudomonas Aeruginosa the most feared bacteria infected the man’s chest cavity they injected a few thousand phages directly into his chest cavity and after a few weeks the infection have completely disappeared
Which of these is not a step in the lytic cycle (go by the diagram on the PPT)?
Attach, penetrate, synthesis, assembly, and release
Which of these is not a step in the lysogenic cycle (go by the diagram on the PPT)?
Do not immediately kill the cells they infect
What is the difference between a virulent and temperate virus?
Virulent virus- can lead to destruction of cells
Temperate virus- can not unless it turns into a lytic cycle
What is a prophage?
When you have the viral DNA attach to the host DNA