41. | Which of the following is nutritional characterization of Escherichia coli? |
a. | Chemotrophic |
b. | Organotrophic |
c. | Autotrophic |
d. | Chemotrophic, Organotrophic, Heterotrophic |
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Answer: (d).Chemotrophic, Organotrophic, Heterotrophic
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42. | Which of the following amino acids require sulphur for their synthesis? |
a. | tryptophan |
b. | methionine |
c. | cystine |
d. | methionine and cystine |
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Answer: (d).methionine and cystine
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43. | Phosphorus is essential component of __________ |
a. | teichoic acid |
b. | nucleotides |
c. | phospholipids |
d. | teichoic acid, nucleotides, phospholipids |
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Answer: (d).teichoic acid, nucleotides, phospholipids
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44. | Which of the following are trace elements? |
a. | Potassium ion |
b. | Sodium ion |
c. | Copper ion |
d. | Magnesium ion |
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Answer: (c).Copper ion
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45. | 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 |
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Answer: (c).Magnesium ion and Iron ion
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