Nutritional Requirements

 

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Nutritional Requirements

Question 1
The organisms which can use reduced inorganic compounds as electron donors are known as .....
A
chemotrophs
B
organotrophs
C
lithotrophs
D
phototrophs

Question 2
Which of the following ions are cofactors for various enzymes?
A
Potassium ion
B
Iron ion
C
Magnesium ion and Iron ion
D
Calcium ion

Question 3
Which of the following are trace elements?
A
Potassium ion
B
Sodium ion
C
Copper ion
D
Magnesium ion

Question 4
"Red extreme halophiles", are members of the archaebacterial which cannot grow with less than 12 to 15 percent NaCl.
A
True
B
False

Question 5
Chromatium okenii uses which of the following compound as electron donor?
A
Hydrogen sulphide
B
Fatty acids
C
Alcohol
D
Succinate

Question 6
Which of the following is nutritional characterization of Escherichia coli?
A
Chemotrophic
B
Organotrophic
C
Autotrophic
D
Chemotrophic, Organotrophic, Heterotrophic

Question 7
Some bacteria require organic sulphur compounds, some are capable of utilizing inorganic sulphur compounds and some can even use elemental sulphur. 4. Phosphorus is essential component of .....
A
teichoic acid
B
nucleotides
C
phospholipids
D
teichoic acid, nucleotides, phospholipids

Question 8
Which of the following amino acids require sulphur for their synthesis?
A
tryptophan
B
methionine
C
cystine
D
methionine and cystine

Question 9
Which of the following are functions of water in the culture medium?
A
nutrients must be in aqueous solution
B
cofactor of enzymes
C
provides resistance to sudden transient temperature changes
D
it is a chemical reactant, nutrients must also be present in aqueous solution and provides resistance to sudden temperature changes.

Question 10
Which of the following bacteria can grow both as chemolithotrophs or as chemoorganotrophs?
A
Nitrosomonas sp.
B
Pseudomonas pseudoflava
C
Rhodospirillum rubrum
D
Chromatium okenii
There are 10 questions to complete.

 

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