6525292
Description
Quiz by Nada Medhat, updated more than 1 year ago
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Created by Nada Medhat
about 8 years ago
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Question 1
Question
1- which one of the following statements concerning glycolysis is correct ?
Answer
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a- the conversion of glucose to lactate requires the presence of oxygen
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b- fructose 2.6- bis phosphate is a potent inhibitor of phosphofructokinase
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c- the regulated reactions are also the irreversible reactions
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d- the conversion of glucose to lactate yields two ATP and two NADH
Question 2
Question
2- the reaction catalyzed by phosphofructokinase-1 :-
Answer
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a- is activated by high concentrations of ATP and citrate.
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b- uses fructose 1-phosphate as substrate
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c- is the rate limiting reaction of the glycolytic pathway
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d- is inhibited by fructose 2,6- bis phosphate
Question 3
Question
3- which of the following statements best describes glucose :-
Answer
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a- it is a ketose and usually exists as a fructose ring in solution
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b- it is a C-4 epimer of galactose
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c- it is utilized in biological systems only in the L-isomeric form
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d- it is produced from dietary starch by the action of alpha amylase
Question 4
Question
4- a patient urine is giving +ve Benedict test , but with - ve glucose oxidase test .
the sugar present in urine might be :-
Answer
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a) glucose
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b) sucrose
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c) galactose
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d) starch
Question 5
Question
5- Milk intolerance that may follow gastroenteritis is due to loss of which of the following :-
Answer
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a) Amylase
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b) Lactase
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c) Sucrase
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d) Cellulase
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