19_pdfsam_apluspreptt1pkg - All viroids have ribozyme...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
All viroids have ribozyme activity. – F (Only two have ribozyme activity) All virusoids have ribozyme activity. – T All eukaryotic cells have RNA-induced Silencing Complex (RISC). – T Dicer is evolutionarily conserved in worms, flies, plants, fungi and mammals. – T RNA dependent RNA polymerases are found in nearly every eukaryote except insects and animals. – T 11. 15-STEP Comprehensive Review Absolute Parasitism Viruses – RNA OR DNA; NO growth, fission metabolism, motility ABSOLUTE parasites > CANNOT replicate outside a living cell CAN become a functional part of the cell > cause cancer “Budding” – viruses get a piece of host cell membrane to exit Herpes (oral, genital) – go into ganglia, hide Anti-viral – Acyclovir (HSV); Amantidine, Rimantidine (flu A); AZT, protease inhibitor (HIV1); Neuramindinase inhibitor, Ribavirin (flu) Antibiotics have NO effect on virus; only avoid 2 nd ry infect’n by bacs NA Enzymes RNA: 2’OH (ribose); DNA: 2’H (deoxy-); 3’&5’ C link to phosphates
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/19/2010 for the course CSB CSB351 taught by Professor Ab during the Spring '09 term at University of Toronto- Toronto.

Ask a homework question - tutors are online