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L4, Amino acids metabolism 4, biochemistry

 L4, Amino acids metabolism 4, biochemistry


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MCQ



1. Which of the following is aromatic amino acid: 

a- phenylalanine          
b- histidine            
c- proline                
d- all of the above  

2. Which of the following is important derivatives of phenylalanine & tyrosine: 

a- niacin                         
b- serotonin              
c- melatonin          
d- non of the above  

3. Increase VMA amount in urine indicate that

a- increase amount of serotonin in the body  
b- decrease amount of melatonin in the body  
c- tumor in the adrenal gland ( pheochromocytoma ) 
d- decrease amount of catecholamine  

4.Which of the following is true:  

a- tyrosine is essential amino acid 
b- tryptophan is essential amino acid 
c- proline is essential amino acid  
d- non of the above   

5. Which of the following is important for melanin synthesis: 

a- Tyrosinase enzyme           
b- MSH hormone           
c- Copper                    
d- all of the above 

6. Albunism is an inborn error in which amino acid:  

a- tyrosine             
b- histidine          
c- proline            
d- valine  

7. All of the following is important derivatives for tryptophan except: 

a- Melatonin        
b- Melanin             
c- serotonin         
d- Niacin 

8. Which of the following is false about histidine amino acid: 

a- It is converted to glutamate 
b- Ergothionine is an important derivative 
c- It is a semi essential amino acid 
d- Hartnup disease is an inborn error  

9. Increase amount of Figlu in urine used as a diagnostic test for: 

a- folic acid deficiency            
b- increase catecholamine     
c- decrease melanin      
d- none of the above 

10. Which amino acid enter in the formation of collagen: 

a- Proline                  
b- histidine                  
c- tryptophan                    
d-all of the above 

11. Which of the following vitamins is important for proline amino acid: 

a- Vit A                 
b- Vit B             
c-Vit C                
d-Vit D 

Answers 


1. d 
2.d 
3. c 
4. b
5. d 
6. a 
7. b 
8.d 
9. a 
10. a 
11. c


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