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 (D)</p> Signup and view all the answers

What are the functions of the Haptonema?

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

What is the main composition of Coccoliths?

<p>Calcium carbonate scales (B)</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 (D)</p> Signup and view all the answers

What is a unique feature of Stramenopiles' flagella?

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

Which category does Diatoms (Bacillariophyta) fall into?

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

What is the characteristic construction of a Diatom Frustule?

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

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

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

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

<p>Ciliophora (C)</p> Signup and view all the answers

What type of plastids do many/most Dinoflagellates possess?

<p>'Chromalveolate' plastids (A)</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 (C)</p> Signup and view all the answers

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

<p>Sporozoites, merozoites, gametes (B)</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 (D)</p> Signup and view all the answers

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

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

What type of lifecycle is exemplified by the Apicomplexans?

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

What is a characteristic feature of Ciliophora (Ciliates)?

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

What is a common misconception about Ciliophora?

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

Which part of the Ciliate cell is associated with phagocytosis?

<p>Gullet (B)</p> Signup and view all the answers

What distinguishes Ciliophora from other 'protozoan' groups?

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

Which organelle is responsible for maintaining osmotic balance in Ciliophora?

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

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

<p>Pseudopodia (B)</p> Signup and view all the answers

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

<p>Degenerates (D)</p> Signup and view all the answers

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

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

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

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

What distinguishes Choanoflagellates among the mentioned groups in the text?

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

What is the defining feature of Choanoflagellates?

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

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

<p>Photosynthesis (C)</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 (A)</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%) (D)</p> Signup and view all the answers

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

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

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