section 1: cell structure - topic 3: prokaryotic cells Flashcards

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1
Q

difference in size: P v E

A

P: extremely small cells (less than 2 micrometers diameter)
E:

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2
Q

difference in DNA: P v E

A

P: DNA is circular
E: DNA is linear

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3
Q

difference in nucleus: P v E

A

P: no nucleus - DNA free in cytoplasm
E: nucleus present - DNA inside nucleus

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4
Q

difference in cell wall: P v E

A

P: cell wall made of a polysaccharide, but not cellulose or chitin
E: no cell wall (animals), cellulose cell wall (plants), chitin cell wall (fungi)

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5
Q

difference in organelle amount: P v E

A

P: few organelles & no membrane-bound organelles i.e. no mitochondria
E: many organelles - mitochondria & other membrane-bound organelles present

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6
Q

difference flagella: P v E

A

P: flagella (when present) made of the protein flagellin, arranged in a helix
E: flagella (when present) made of microtubules arranged in a ‘9 + 2’ formation

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7
Q

difference in ribosomes: P v E

A

P: small ribosomes (20 nanometres or less)
E: larger ribosomes (over 20 nanometers)

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8
Q

examples: P v E

A

P: e.coli bacterium, salmonella bacterium
E: human liver cell, yeast, amoeba

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