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

832. 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

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

834. 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

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

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

837. The inputs to one cycle of the urea cycle are
A. 1 molecule of aspartic acid, 1 molecule of ammonia, 1 molecule of carbon dioxide, 3 molecules of ATP
B. 1 molecule of urea, 1 molecule of ammonia, 3 molecules of ATP and 1 molecule of fumaric acid
C. 1 molecule of fumaric acid, 1 molecule of urea, 3 molecules of AMP
D. None of the above

838. The symptoms of retinol excess are
A. bone fragility
B. nausea
C. weakness
D. all of these

839. Main function of insulin hormone is to
A. increase glycogen in liver
B. decrease glycogen in liver
C. increase blood sugar
D. decrease blood sugar

840. Ascorbic acid acts as an
A. reducing agent
B. oxidizing agent
C. oxidizing and reducing agent both
D. none of the above

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