Biochemistry MCQ (BP203 T) I (QUIZ - 19) F. Y. B. Pharm SEM –II (UNIT- 2)

 

BIOCHEMISTRY (BP203T) MCQ (Quiz-19) 

Carbohydrate Metabolism 

MULTIPLE CHOICE QUESTIONS

F. Y. B. PHARM  SEM-II (UNIT - 2)

AS PER PCI SYLLABUS

1. How many ATP molecules will be required for conversion of 2-molecules of Lactic acid to Glucose?

  A) 2  
B) 4
C) 6
D) 8

... Answer is : C) 6

2. In presence of the following cofactor, pyruvate carboxylase converts pyruvate to oxaloacetate:

A) CO2
B) ATP, Protein and CO2
C) Protein
D) CO2 and ATP

... Answer is : B) ATP, Protein and CO2

3. If the more negative standard reduction potential of a redox pair, the greater the tendency to

A) To gain electrons
B) To lose/gain electrons
C) To lose electrons
D) To lose and gain electrons

... Answer is : C) To lose electrons

4. The more positive the E0, the greater the tendency of the oxidant member of that pair to

A) Lose (or) gain electrons
B) Lose and gain electrons
C) Lose electrons
D) Gain electrons

... Answer is : D) Gain electrons

5. The transport of a pair of electrons from NADH to O 2 via the electron transport chain produces

A) 21,900 cal
B) +52,580 cal
C) –50,580 cal
D) –52,580 ca

... Answer is : B) +52,580 cal

6. The free energy change, AG .

A) Is equal to zero at equilibrium
B) Is directly proportional to the standard free energy change, AG
C) Is equal to –RT in keq
D) Can only be calculated when the reactants and products are present at 1mol/1 concentrations

... Answer is : A) Is equal to zero at equilibrium

7. An uncoupler of oxidative phosphorylation such as dinitrophenol

A) Inhibits electron transport and ATP synthesis
B) Inhibits electron transport without impairment of ATP synthesis
C) Allow electron transport to proceed without ATP synthesis
D) Specially inhibits cytochrome b

... Answer is : C) Allow electron transport to proceed without ATP synthesis

8. Glucokinase

A) Has a high km for glucose and hence is important in the phosphorylation of glucose primarily after ingestion of a carbohydrate rich meal
B) Is widely distributed in Prokaryotes
C) Is widely distributed and occurs in most mammalian tissues
D) None of these

... Answer is : A) Has a high km for glucose and hence is important in the phosphorylation of glucose primarily after ingestion of a carbohydrate rich meal

9. Compared to the resting state, vigorously contracting muscle shows

A) A decreased NADH/NAD+ ratio
B) Decreased concentration of AMP
C) Decreased oxidation of pyruvate of CO2 and water
D) An increased conversion of pyruvate to lactate

... Answer is : D) An increased conversion of pyruvate to lactate

10. Which one of the following statements concerning glucose metabolism is correct?

A) An elevated level of insulin leads to a decreased level of fructose 2, 6-bisphosphate in hepatocyte
B) Pyruvate kinase catalyses an irreversible reaction
C) Glucose enters most cells by a mechanism in which Na+ and glucose are co-transported
D) The conversion of Glucose to lactate occurs only in the R.B.C

... Answer is : B) Pyruvate kinase catalyses an irreversible reaction