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Biochemistry - Nitrogen Metabolism

@ : Home > Biochemistry > Nitrogen Metabolism > Section 1

Exercise

  • Section 1
"I never see what has been done; I only see what remains to be done."
- Marie Curie
1. 

How many molecules of ATP are hydrolysed to form two molecule of ammonia?

A. 10B. 5
C. 16D. 15

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

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

4. 

Nitrate reduction can be carried out by

A. only microorganism
B. plant and microorganism
C. only plants
D. none of these

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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