viruses and last lecture of microbial genetics ~~

21^st November 2014

8.00-10.00 am

Today I learnt about Viruses with Dr Wan.

We have no game for today.

Acellular agents are :

·         Viruses

·         Viroids

·         Satellites

·         Prions

Viruses are the major cause of disease. There are some important of viruses :

·         Important members of aquatic world

·         Important in evolution

·         Important model system in molecular biology

There are two type of viruses :

·         Envelope viruses

·         Non-envelope viruses

There are three types of capsids :

·         Helical

·         Icosahedral

·         Complex

Viral multiplication involve several steps :

·         Attachment to host cell

·         Entry and

·         uncoating (degrading cell membrane)

·         synthesis protein

·         assembly

·         release

10.00am-12.00 pm

Today is the forth lecture with Prof Khatty on Microbial Genetic. The more we studied this topic the more difficult I found it. HUH L

Today I learnt about genetic transfer and recombinant.

Genetic recombinant refers to the rearrangement of DNA from separate groups of genes.

Genetic transfer in prokaryotes involve :

·         transformation

·         transduction

·         conjugation

Types of plasmid :

·         dissimilation plasmid

·         conjugative plasmid

·         R factors

There are three distinct types of transposons :

·         Class II Transposons consisiting only of DNA that moves directly from place to place.

·         Class III Transposons also known as Miniature Inverted-repeats Transposable

·         Class I : Retrotransposons that

ü  First transcribe the DNA into RNA

ü  Use reverse transcriptase to make a DNA copy of the RNA to insert in a new location.

End our class today with steady and sleepy. Wehuuuu HAHA, BYE! J