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Microbial physiology answer sheet
Classification of organisms
1
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Why was small subunit RNA used?
Essential for survival
Slower rate of change accumulation in DNA level as functionally important
Present in all cells
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______ Sequences mutate slower than _______ sequences
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Name two prokaryotic microbes and three eukayotic microbes
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What makes the cell walls of bacteria and archea different?
Peptigoglycan, pseudo-Muerin
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Prokaryotes-smaller in size,no nucleus,membrane bound organelles absent, cell wall
present( made of peptidoglycan or pseudo muerin),smaller ribosomes(70s),Bacteria lack
histones but archea has histones,cell divides by binary fission and not mitosis
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Draw the flow tree of bacteria classification
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9
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11
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13
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Purple,red
What came first? Gram negative or positive?
Gram negative
What is peptidoglycan made of?
Peptidoglycan, also known as murein, is a polymer consisting of sugars and amino
acids that forms a mesh-like layer outside the plasma membrane of most bacteria,
forming the cell wall
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Sugar chains cross-linked by peptides through NAM residues
Name two things present only on gram positive cell walls?
Teichoic and lipoteichoic acids
State two atypical bacterial cell walls
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AlphaFound in plants and may be in moitochondria (rhizobium)
BetaAnimal pathogen,thiobacillus

Microbial physiology answer sheet
GammaMedicinally important,E
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What are firmicutes?
Gram-positive bacteria
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Archea are more related to ______ than ______
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Name three similarities of arehcea and bacteria
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Name the three types of thermophiles
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What are fungi cell walls composed of ?
Chitin
19
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Yeast and mould
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State three similarities between Protozoa and Algae
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State three things that anabolic reactions need
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Why do anabolic reactions need energy?
To change from high to low entrophy ( form bonds)
3
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Disect the following terms; photolithotrophy,
photoorganotryphy,chemorganotrphy,chemolithotrophy, heterotrophs, autotrophs
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Photolithotrophy-Using the energy derived from light to oxidise inorganic compounds
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Chemolithotrophy-Using the energy derived from chemical reactions to oxidise inorgainic
compounds
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They also covert _____to
sulphates
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Thiobacillus Ferroxidans,fe2+ Fe3+,sulphite, acidic

Sachin

Microbial physiology answer sheet
Bacterial growth
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Binary fission
Multiple fission
Budding
sporulation
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DNA replication finished before the separation
Correct septu

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