Microbiology Lecture Week 5
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Questions and Answers

Which of the following is a characteristic of 'Chromalveolate' plastids?

  • Contain phycobilisomes
  • Stacked thylakoids (correct)
  • Possessing 5 membranes
  • Originating from green algae
  • Which type of algae is known to have 'Chromalveolate' plastids?

  • Green algae
  • Cyanobacteria
  • Haptophytes (correct)
  • Rhodophytes
  • What is a common feature of haptophytes?

  • Large size
  • Small flagellates (correct)
  • Presence of stacked thylakoids
  • Absence of flagella
  • How do secondary plastids differ from primary plastids?

    <p>Possessing chlorophyll c</p> Signup and view all the answers

    What are the functions of the Haptonema?

    <p>Sensory, Attachment, Feeding in all mixotrophs</p> Signup and view all the answers

    What is the main composition of Coccoliths?

    <p>Calcium carbonate scales</p> Signup and view all the answers

    How is calcium carbonate deposited in Coccolith Formation?

    <p>On an organic scale base within an endomembrane vesicle</p> Signup and view all the answers

    What is a unique feature of Stramenopiles' flagella?

    <p>'Reverses' effect of 'flagellar beat'</p> Signup and view all the answers

    Which category does Diatoms (Bacillariophyta) fall into?

    <p>Unicellular protists</p> Signup and view all the answers

    What is the characteristic construction of a Diatom Frustule?

    <p>Extracellular 'box with lid' construction</p> Signup and view all the answers

    Which part of a Diatom Frustule undergoes cell division to become an epitheca in a daughter cell?

    <p>Parental epitheca</p> Signup and view all the answers

    What is the predominant ploidy in the life cycle of Centric Diatoms?

    <p>Diploid dominant</p> Signup and view all the answers

    Which of the following groups of Alveolates are mostly 'free-living' protozoa?

    <p>Ciliophora</p> Signup and view all the answers

    What type of plastids do many/most Dinoflagellates possess?

    <p>'Chromalveolate' plastids</p> Signup and view all the answers

    Which group of Alveolates are known to be major parasites of animals causing diseases like malaria and toxoplasmosis?

    <p>Apicomplexa</p> Signup and view all the answers

    What are the three main cell types involved in the apicomplexan lifecycle?

    <p>Sporozoites, merozoites, gametes</p> Signup and view all the answers

    What is a unique aspect of the Apicomplexan lifecycle compared to other life cycles?

    <p>It involves multiple fission in reproduction</p> Signup and view all the answers

    Which structure under the cell membrane of Alveolates consists of flattened vesicles?

    <p>Cortical alveoli</p> Signup and view all the answers

    What type of lifecycle is exemplified by the Apicomplexans?

    <p>Haploid-dominant lifecycle</p> Signup and view all the answers

    What is a characteristic feature of Ciliophora (Ciliates)?

    <p>Presence of pellicle</p> Signup and view all the answers

    What is a common misconception about Ciliophora?

    <p>They are photosynthetic</p> Signup and view all the answers

    Which part of the Ciliate cell is associated with phagocytosis?

    <p>Gullet</p> Signup and view all the answers

    What distinguishes Ciliophora from other 'protozoan' groups?

    <p>Use of cilia for locomotion</p> Signup and view all the answers

    Which organelle is responsible for maintaining osmotic balance in Ciliophora?

    <p>Contractile vacuole</p> Signup and view all the answers

    Which part of the Foraminiferan cell is usually made of calcium carbonate?

    <p>Pseudopodia</p> Signup and view all the answers

    What is the main function of the macro nucleus in Ciliates during conjugation?

    <p>Degenerates</p> Signup and view all the answers

    In Slime Moulds, what structure represents the spores responsible for dispersal?

    <p>Fruiting bodies</p> Signup and view all the answers

    Which organelle supports Amoeboza's pseudopodia with microtubules for organelle transport?

    <p>Endoplasmic Reticulum</p> Signup and view all the answers

    What distinguishes Choanoflagellates among the mentioned groups in the text?

    <p>Heterotrophic nutrition</p> Signup and view all the answers

    What is the defining feature of Choanoflagellates?

    <p>Ring of actin-supported microvilli around the flagellum</p> Signup and view all the answers

    What is the primary source of energy for Cyanobacteria in the ocean?

    <p>Photosynthesis</p> Signup and view all the answers

    Who are the main predators of prokaryotes in the ocean, according to the text?

    <p>Protists, especially heterotrophic flagellates</p> Signup and view all the answers

    What role do viruses (phage) typically play in the ocean ecosystem?

    <p>A significant cause of prokaryote mortality (10-40%)</p> Signup and view all the answers

    What is the main function of the collar surrounding the flagellum in Choanoflagellates?

    <p>Capturing food particles</p> Signup and view all the answers

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