caderno 1professor marcello lasneaux monera. procariotos bactérias
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Caderno 1 Professor Marcello Lasneaux
Monera
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MoneraProcariotosBactérias
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Bactérias
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Vibrião: variação do baciloCausador da cólera
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cólera
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As bactérias causam doenças...
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Salmonella:diarréia
dorfebre
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Qual o melhor antibiótico?
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Podem realizar fotossíntese
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Estrutura
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Coloração e classificação
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Gram-negativa: cora com róseo (2º corante)Apresentam uma membrana externa
lipossacarídica
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Diferença das bactérias
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Flagelo
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Flagelo dos eucariotos
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Pili (pilus) FixaçãoConjugação
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MesossomoRespiraçãoFotossíntese bacterianaAncoragem do DNA
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Estrutura geral
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Bipartição ou fissão binária
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Recombinação genética: conjugação
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Transformação: absorver DNA do meio
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Transdução: o uso do vírus
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MicoplasmasNão sofrem coloração de GramNão têm parede celularColoniais lembram hifas
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ClamídiasInfecções urogenitaisParasitas intracelulares obrigatóriosFormam esporos
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RickéttsiasParasitas intracelulares obrigatóriosNão formam esporosVivem em artrópodos:
PulgaCarrapato (febre maculosa)Piolho
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Arqueas (“arqueobactérias”)Não colorem com GramNão apresentam parede de peptidioglicanoSão procariotos de condições extremas
MetanogênicasTermófilas
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Evolução das arqueas
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Cianobactérias (Cianófitas)Outrora chamadas de algas
azuisSó apresentam reprodução
assexuada
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Heterocisto e acinetoHeterocisto: área de fixação de
nitrogênioAcineto: célula de resistência a condições
adversas.
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PROTISTASCélulas eucarióticasGrupo polifilético“Grupo de espera” ou “purgatório”Segundo Woese:
Todas as algasProtozoários
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Crisófitas (diatomáceas)
FotossintetizantesParede celular de sílicaPigmentos: clorofila e
fucoxantina.São algas douradas.
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diatomito
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diatomácea
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Pirrófitas ou dinófitas (dinoflagelados)
Parede celular de celulose
Clorofila, caroteno e xantofila
Presença de flagelosRelacionadas com a maré
vermelha
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Dinoflagelados: bioluminescentes
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Maré vermelha, Califórnia (1995)
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Euglenófitas
Sem parede celularClorofila Podem realizar
fagocitose
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Euglena