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BAB III VIRUS

BAB III VIRUS. Tobacco Mosaic Virus (TMV). LEARNING OBJECTIVE. After discussion the students can: 1. Identify the characteristic of virus. 2. Explain the life cycle of virus. 3. Explain the replication process in virus. BAB 3 VIRUS. Percobaan A.Mayer pada Penelitian Virus.

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BAB III VIRUS

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  1. BAB IIIVIRUS Tobacco Mosaic Virus (TMV)

  2. LEARNING OBJECTIVE After discussion the students can: 1. Identify the characteristic of virus. 2. Explain the life cycle of virus. 3. Explain the replication process in virus.

  3. BAB 3 VIRUS Percobaan A.Mayer pada Penelitian Virus Disemprotkan Ekstrak daun Tembakau yang berpenyakit Tanaman tembakau menjadi sakit Tanaman tembakau sehat Ekstrak daun Tembakau yang berpenyakit Daunnya dihaluskan

  4. Tanaman tembakau menjadi sakit Filtrat daun tembakau yang berpenyakit Penyaringan ekstrak daun tembakau yang berpenyakit Daun tembakau yang berpenyakit dihaluskan Disemprotkan Tanaman tembakau yang sehat Filtrat BAB 3 VIRUS Percobaan Dmitri Ivanowski pada Penelitian Virus

  5. Virus Characteristics • Viruses are very small (25-300 nm). • A virus is not a cell (virus bukanlahsel) • Virus does not have cellular components such as cell membrane, cytoplasm and nucleus (virus tidakmemilikibagian-bagianselsepertimembran plasma, sitoplasmadaninti) • Virus is composed of a nucleic acid and protein coat called as capsid(Virus tersusunatasasamnukleatdanselubung protein yang disebutkapsid)

  6. Batang Bulat Seperti huruf T Polihidris BAB 3 VIRUS Bentuk-bentuk Virus

  7. Nucleic acid Head Protein coat Sheath Tail fibre Structure of Viruses Structure

  8. The Structure Of a Virus • Viruses are composed of nucleic acid (virus tersusun atas asam nukleat) • The Nucleic acid is surrounded by a protein coat called a capsid (asam nukleat dise-lubungi oleh kapsid) • Virus has only one type of nucleic acid DNA or RNA. (virus hanya memiliki satu jenis asam nukleat DNA atau RNA saja)

  9. BAB 3 VIRUS Struktur Tubuh Virus Selubung lipid RNA virus Enzim “reverse transcriptase” Selubung protein (kapsid)

  10. BAB 3 VIRUS Bentuk-bentuk Selubung Protein (Kapsid) Virus RNA virus DNA Subunit protein selubung (kapsomer) Selubung protein Selubung ekor Lempengan dasar Serabut ekor berbentuk kompleks berbentuk heliks berbentuk polihedral

  11. A provirus is a DNA virus that has been inserted into a host cell chromosome.

  12. A retrovirus injects the enzyme, reverse transcriptase into the cell to copy viral RNA into DNA.

  13. BAB 3 VIRUS Reproduksi Bakteriofage dengan Siklus Litik danLisogenik

  14. 1. Type Lytic a. Adsorption, virus attach in cell wall of bacteria. b. Penetration, virus to infecting the cell wall of bakteria then inject the genetic material. c.Replication, virus multiplies itself by manipulating host genetic materials. d. Maturation, Formation of new virus. e. Lytic, newly assembled viruses are released from the host cell by lisis.

  15. 2. Type lysogenic a. Adsorption, virus attach in cell wall of bacteria. b. Penetration, virus to infecting the cell wall of bakteria then inject the genetic material. c. Eclipase, the genetic material from the virus is take the metabolism system of host cell. d. Mitosis, bacteria cell will cleavage and the new virus will be form consist of DNA virus and bacteria choromosome e. Maturation, formation of bacteria cell consist of DNA virus and bacteria choromosome

  16. The differences between lytic and lisogenic cycle

  17. Penggolongan Virus Tidak mengikuti sistem klasifikasi Linnaneus 1)Berdasarkan ICTV, virus terbagi menjadi empat tingkatan/takson yaitu Ordo, Famili, Genus dan Species. • Penamaan ordo diakhiri Virales. • Penamaan famili diakhiri Viridae • Penamaan genus diakhiri dengan kata Virus

  18. Contoh: Ordo : Mononegativirales Famili : Filoviridae Genus : Filovirus Spesies : Ebola virus

  19. 2. Berdasarkan Materi GenetikDNA dan RNA Virus a. DNA Virus

  20. 2. Berdasarkan Materi GenetikDNA dan RNA Virus b. RNA Virus

  21. 3. Berdasarkan Sel Inangnya • Virus Alga • Virus Archae • Virus Bakteri ( Bakteriofage virus menyerang E.coli) • Virus Fungi • Virus Invertebrata • Virus Tumbuhan (Tobacco Mosaic Virus) • Virus Vertebrata (HIV)

  22. Peran Virus bagi Kehidupan Manusia • Manfaat Virus bagiManusia Vaksinuntukmencegahpenyakit. Vaksinadalah virus yang dilemahkan. Vaksintersebutdisuntik-kanketubuhmanusiadanmenyebabkantubuhmemproduksiantibodi. Vaksinmerangsangpembentukansistemkekebalantubuh.

  23. 2. Kerugian Virus bagi Manusia • Virus yang MenyerangTumbuhan • PenyakitkerdilpadapadidisebabkanolehTungro virus. • PenyakittrstezapadajerukolehTristeza virus . Akibatnya, pertumbuhanjerukmenjadimelambat, cabangberlubang. • PenyakitbercakkuningpadadauntembakauolehTobacco mozaic virus.

  24. 2. Kerugian Virus bagi Manusia b. Virus yang MenyerangHewan • Rabies virus menyerangsistemsarafpusatmanusiadanhewan. • Foot and mouth disease virus menyebabkanpenyakitmulutdan kaki padasapidankerbau. • Hepatitis B virus menyebabkaninfeksihati

  25. 2. Kerugian Virus bagi Manusia b. Virus yang MenyerangManusia • Poliomyelitis virus menyebabkanpenyakit polio. • Influenza virus menyebabkanpenyakit influenza. • Varicalla virus menyebabkanpenyakitcacar air. • Rubella virus menyebabkanpenyakitcampak. • Ebola virus menyebabkanpenyakitebola • HIV penyebabpenyakit AIDS

  26. BAB 3 VIRUS Virus-virus Penyebab Penyakit Bunga tulip yang terserang virus TMV Daun anggrek yang terserang virus Virus herpes Tanaman tomat yang terserang TMV Virus ebola

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