Cell biology and Microbiology at Hochschule Rhein-Waal

Flashcards and summaries for Cell biology and Microbiology at the Hochschule Rhein-Waal

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Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

Which of the following statements concerning phospholipids is false?

Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

The nucleus of the eukaryotic cell functions

Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

How did eucaryotes originate?
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Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

Chloroplasts 

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Organelles present in animals but not in plant cells

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Organelles present in plant but not in animal cells

Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

Central vacuoles
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Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

Universal features of cells 

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Mitochondria origin

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Nucleolus 

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Endoplasmic Reticulum
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Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

Cytoskeleton 
  • What is it
  • Composed of
  • Functions (4)

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Exemplary flashcards for Cell biology and Microbiology at the Hochschule Rhein-Waal on StudySmarter:

Cell biology and Microbiology

Which of the following statements concerning phospholipids is false?

They contain three fatty acid chains

Cell biology and Microbiology

The nucleus of the eukaryotic cell functions
As the command center for the cell

Cell biology and Microbiology

How did eucaryotes originate?
Eucaryotes originated as predators on other cells. Since they:
  • Are able to engulf other cells
  • Keep DNA in a membrane-enclosed nucleus
  • Have a metabolism depending on organic molecules oxidation by mitochondria

Cell biology and Microbiology

Chloroplasts 
  • Found in plants and algae
  • Sites of photosynthesis - contain green pigment chlorophyll, along with enzymes and other molecules that function in the photosynthetic production of sugar

Cell biology and Microbiology

Organelles present in animals but not in plant cells
  • Lysosomes 
  • Centrioles
  • Flagella (in some plant sperm)

Cell biology and Microbiology

Organelles present in plant but not in animal cells
  • Chloroplasts
  • Central vacuole 
  • Cell wall
  • Plasmodesmata

Cell biology and Microbiology

Central vacuoles
Hold organic compounds and water

Cell biology and Microbiology

Universal features of cells 
  • Hereditary information is stored in the linear chemical code (DNA)
  • All cells transcribe genetic information into RNA
  • RNA molecules are translated into proteins 
  • All cells are enclosed in a plasma membrane through which nutrients and waste products pass

Cell biology and Microbiology

Mitochondria origin
(And Chloroplasts in plants) 
Contain their own DNA and evolved from bacteria that were taken up by eucaryotic cells and survived as symbionts

Cell biology and Microbiology

Nucleolus 
(Not a membranous organelle) 
Located within the nucleus and is the site of of ribosomal (rRNA) synthesis

Cell biology and Microbiology

Endoplasmic Reticulum
“Biosynthetic Factory” 
  • Accounts for more than half of the total membrane in many eukaryotic cells 
  • ER membrane is continuous with nuclear envelope
  • Two regions: smooth ER - lacks ribosomes, rough ER - with ribosomes on Surface

Cell biology and Microbiology

Cytoskeleton 
  • What is it
  • Composed of
  • Functions (4)
  • Network of fibers extending throughout the cytoplasm
  • Composed of three types of molecular structures: Microtubules, microfilaments, and intermediate filaments
Functions: 
  • Helps to support cell and maintain the shape
  • Interacts with motor proteins to produce motility
  • Provides “monorails” along which vesicles can travel
  • Anchors many organelles

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