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MBIO 1010 > microbial growth and nutrition > Flashcards

microbial growth and nutrition Flashcards

1
Q

what are examples of macronutrients

A

proteins
carbohydrates
lipids
nucleic acids

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2
Q

what are the compositions for proteins

A

C,H,O,N,S

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3
Q

what are the compositions for carbohydrate

A

C,H,O,N

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4
Q

what are the compositions for nucleic acids

A

C,H,O,N,P

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5
Q

what are the compositions of lipids

A

C,H,O,P

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6
Q

what is the function of Mg2+ in cells

A

it helps stabilize membranes and nucleic acids

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7
Q

what is the function of ca2+ in endospore

A

it helps in heat stability

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8
Q

give examples of inorganic ions

A

K, Mg, Ca, Fe

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9
Q

function of a micronutrient is

A

serve as cofactor for enzymes

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10
Q

examples of micronutrients

A

Mn, Ni, Zn, Co, Cu, Mo

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11
Q

what are the classes of growth factors

A

20 amino acids
purines and pyrimidines
vitamins

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12
Q

small molecules required to make growth factors

A

vitamins

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12
Q

does organic N need to be reduced

A

no

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12
Q

inorganic N must be reduced to

A

NH3

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12
Q

atmospheric N2 needs to be reduced to

A

2NH3

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13
Q

what are heterotrophs in terms of the carbon they use

A

they use organic carbons

14
Q

what uses inorganic carbon(cO2) as their source of carbon

A

autotrophs

15
Q

fermentation and respiration are examples of what type of energy reaction

A

catabolic

16
Q
A
17
Q

Micro organisms can be categorized according to what based on source

A

Energy source
Electron source
Carbon source

18
Q

Energy is classified into what

A

Chemo
Photo

19
Q

Electron source is classified into

A

Organo
Litho

20
Q

Carbon source is categorized into

A

Hetero
Auto

21
Q

Explain chemoorganotrophs

A

Energy gotten from chemical reactions involving organic compounds

22
Q

What are chemolithotrophs

A

Energy gotten from chemical reactions involving inorganic compounds

23
Q

Example of chemoorganotrophs

A

E.coli, bacillus, pseudomonas

24
Q

What is a defined medium

A

It has the exact chemical composition

25
Q

What are the benefits of a defined medium

A

Used to study metabolism

26
Q

What is minimal medium

A

A medium that provides the minimum requirement for growth

27
Q

What kind of medium is often made with yeast or meat extract

A

Complex medium

28
Q

What is differential medium

A

Allows for different bacteria to be distinguished

29
Q

What are the composition of blood agar

A

T soy and 5% sheep’s blood

30
Q

What does alpha, beta and gamma shapes mean on a blood agar plate respectively

A

Alpha- incomplete destruction of blood cells
Beta- complete destruction of blood cells
Gamma- no destruction

MBIO 1010 (6 decks)

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