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Review1 05

This document provides an overview of key topics in virology, including the structure and life cycle of viruses, methods used to study viruses, and classification of major virus families. It discusses the structures of viral genomes and capsids. It then focuses on bacteriophages, distinguishing between RNA and DNA phages as well as lytic and temperate phages. Finally, it examines plant viruses, differentiating between plus-strand RNA viruses and DNA viruses, and outlining various gene expression strategies used by plant viruses.

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AyioKun
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73 views1 page

Review1 05

This document provides an overview of key topics in virology, including the structure and life cycle of viruses, methods used to study viruses, and classification of major virus families. It discusses the structures of viral genomes and capsids. It then focuses on bacteriophages, distinguishing between RNA and DNA phages as well as lytic and temperate phages. Finally, it examines plant viruses, differentiating between plus-strand RNA viruses and DNA viruses, and outlining various gene expression strategies used by plant viruses.

Uploaded by

AyioKun
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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CLASS REVIEW SESSION I

I. PROPERTIES OF VIRUSES
NATURE OF VIRUSES
COMMON STRUCTURE & LIFE CYCLE
METHODS OF STUDY
ISOLATION OF NUCLEIC ACID AND PROTEIN
ANALYSIS OF MACROMOLECULES
ONE-STEP GROWTH CURVES
STRUCTURE OF VIRUSES
GENOMES - RNA OR DNA
STRANDEDNESS & FORM - LINEAR OR CIRCULAR
ENDS OF LINEAR GENOMES
CAPSIDS
CAPSOMERS AND CHEMICAL UNITS (C & cu)
SYMMETRY:
HELICAL - TMV ET AL
ISOMETRIC, SPHERICAL OR ICOSAHEDRAL
5:3:2 SYMMETRY: 20 SIDES, 30 EDGES, 12 VERTICES
TRIANGULATION NUMBER, C=10T+2, cu=60T
COMPLEX
CLASSIFICATION OF VIRUSES
VIRAL TYPES: I - VII
II. BACTERIOPHAGE
THE RNA PHAGE LEVIVIRIDAE
4 GENES, RNA SECONDARY STRUCTURE
THE DNA LYTIC PHAGE MICROVIRIDAE
φXI74, T7 AND THE Teven PHAGE PODOVIRIDAE
T7 GENOME - LINEAR GENES MYOVIRIDAE
"TAKEOVER OF E. COLI"
THE DNA TEMPERATE PHAGE - LAMBDA SIPHOVIRIDAE
III. THE PLANT VIRUSES
THE PLUS-STRAND RNA VIRUSES (28 GROUPS OR FAMILIES)
FOUR COMMON GENES - 2 REPLICASES, COAT, SPREADING FACTOR
STRATEGIES FOR GENE EXPRESSION:
1. 2ND-START TOBAMOVIRUSES
2. READ THROUGH MONOPARTITE
3. PROGRAMMED FRAME-SHIFTING TOBRAVIRUSES
4. RNA EDITING BIPARTITE
5. POLYPROTEIN BROMOVIRIDAE
6. SUB-GENOMIC RNAs TRIPARTITE
7. DIVIDED GENOME
8. SPLICING
THE DNA VIRUSES
SINGLE-STRANDED, CIRCULAR GEMINIVIRIDAE
DOUBLE-STRANDED, CIRCULAR CAULIMOVIRIDAE
RT AND RNA INTERMEDIATE

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