1. How many molecules of ATP are hydrolysed to form two molecule of ammonia?
A.10
B.5
C.16
D.15

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2. The nitrogen atoms of urea produced in the urea cycle are derived from
A.nitrate
B.ammonia and aspartic acid
C.nitrite
D.ammonia

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3. The products of urea cycle are
A.1 molecule of urea, 1 molecule of ammonia, 1 molecule of ATP and 1 molecule of fumaric acid
B.1 molecule of fumaric acid, 1 molecule of urea, 1 molecule of AMP, 2 molecules of ADP
C.1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of fumaric acid, 1 molecule of ATP
D.None of the above

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4. Nitrate reduction can be carried out by
A.only microorganism
B.plant and microorganism
C.only plants
D.none of these

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5. Which of the following is used as carbon atom source while producing urea in the urea cycle?
A.Arginine
B.Aspartic acid
C.Carbon dioxide
D.Glucose

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6. Which of the following amino acid do not fall under the category of essential amino acid?
A.Histidine
B.Leucine
C.Glycine
D.Methionine

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7. Urea cycle converts
A.ammonia into a less toxic form
B.ketoacids into amino acids
C.amino acids into ketoacids
D.none of these

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