Infectious diseases

Question 1

What % of world deaths are due to infectious and parasitic diseases?

Answer 1

26%

Question 2

Which infectious diseases are the top 3 killers?

Answer 2

1. Respiratory infections
2. Tuberculosis
3. Diarrhea

Question 3

Define a parasite

Answer 3

Any organism which lives in (endoparasite) or on (ectoparasite) the tissues of a living organism from which it derives its nutrients

Question 4

How do viruses replicate?

Answer 4

By using the cellular synthetic machinery to direct the synthesis of specialised virions that transfer the viral genome to other cells.

Question 5

What are the 8 steps in a viral life cycle?

Answer 5

1. Adsorpbtion
2. Penetration
3. Uncoating
4. Transcription
5. Translation
6. Synthesis of virus nucelic acids and the production of virus proteins
7. Assembly of new virus particles
8. Egress

Question 6

What are viroids and virusoids?

Answer 6

the smallest known autonomously self-replicating molecules
Viroids - Plant pathogens composed of single-stranded covalently circular RNA molecules (240-375 residues)
Virusoids - satellite RNAs of similar size which are encapsulated by helper viruses

Question 7

What are prion diseases?

Answer 7

Diseases caused by protein which causes a non-functioning change in shape of a protein which then produces a catalytic process by which more of the protein is made