prokaryotes Flashcards

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1
Q

when coccus divides in 3 planes , it will produce a

A

sarcina

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2
Q

cell wall is only absent in which bacteria

A

mycoplasma (smallest type of bacteria)

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3
Q

syphilis is caused by

A

spirochaete

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4
Q

the entire cell wall is often regarded as a single huge molecule or molecular complex called —–

A

saculus

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5
Q

in prokaryotes —— are involved in respiration

A

mesosomes and cell membrane

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6
Q

a bacterium with tuft of flagella at both poles is called

A

amphitrichous

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7
Q

the most common waste material produced by bacteria is

A

lactic acid

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8
Q

in which category does neiserria most likely fall?

A

cocci

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9
Q

cyanobacteria help in nitrogen fixation since they have

A

heterocyst

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10
Q

periplasmic space, pilli and liposaccharid and lipid membrane is present in

A

gram negative bacteria

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11
Q

purple non sulfur is an example of

A

photosynthetic bacteria

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12
Q

example of bacteria requiring low conc of O2 is

A

campylobacter

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13
Q

cyanobacteria undergo photosynthesis with help of

A

phycobilisome

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14
Q

cocobacillus has a similar shape to

A

egg

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15
Q

which of the following bacteria is similar to the size of a hyphen

A

epulopiscium

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16
Q

approx how many bacteria are known to cause disease in humans?

A

200

17
Q

deafness is caused by the excess of

A

streptomycin

18
Q

which region of rna is reponsible for binding ribosomes during prokaryotic translation

A

shrine dalgrano sequence

19
Q

compound microscope and animacules was first used by

A

AV leeuwenhouck

20
Q

robert koch discovered bacteria that cause

A

tb and cholera

21
Q

the nitrifying bacteria are an example of

A

chemosynthetic bacteria

22
Q

Which bacteria is a Bacilli? (rod shaped)

A

Pseudomonas

23
Q

Vibrio is what kind of spiral?

A

Vibrio is a genus of Gram-negative bacteria, possessing a curved-rod (comma) shape, several species of which can cause foodborne infection, usually associated with eating undercooked seafood.

24
Q

It is a very sticky gelatinous structure made up of polysaccharides and proteins:

A

capsule

25
Q

What is the main difference between the cyst and spores in bacteria?

A

Both cyst and spores are dormant but only spores are resistant to heat, light, pH and desiccation. Cysts are affected by the heat changes.

26
Q

The classification of bacteria is based on

A

morphology, mode of nutrition, biochemical and genetic characteristic.

27
Q

salmonella typhi is what type of bacterium

A

bacillus (rod shape)

28
Q

milk sugar is pasteurized by heating for 15s at the temp of

A

72 C

29
Q

murein cell wall is composed of

A

sugar and amino acids

30
Q

the stain of gram positive ➕bacteria is

A

permanent

31
Q

which group of bacteria never forms colony

A

spirilla

32
Q

— strains of streptococcus bacteria are still detected

A

80
(vaccines r available only for 23)

33
Q

what type of amino acids does the cell wall of bacteria contain

A

Right handed amino acids

34
Q

sizes of phages range

A

24-200 nanometer