Bioenergetics Quiz | Bioenergetics Multiple Choice Questions(MCQs) & Answers

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Questions
1 What is reduction potential?
A The molecule loses an electron
B An atom/molecule gains an electron
C Reducing the power of an electron
D Oxidation power of an electron

Answer: An atom/molecule gains an electron
2 What is the name of the molecule which donates its electrons?
A Reducing agent
B Oxidative agent
C Standard reduction potential
D Oxidant

Answer: Reducing agent
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3 Which of the following act as a storage form of high energy phosphate?
A Glucose-6-phosphate
B Phosphoenolpyruvate
C Phosphagens
D Glycerol phosphate

Answer: Phosphagens
4 What is the standard free energy change of ATP?
A Small and negative
B Large and positive
C Large and negative
D Small and positive

Answer: Large and negative
5 Which of the following equation gives the relationship between ∆G֯ and Keq?
A ∆G֯ = -RT ln Keq
B ∆G֯ = ln Keq
C ∆G = ∆G֯ (-RT Keq)
D ∆G = -RT ln Keq

Answer: ∆G֯ = -RT ln Keq
6 Which of the following factor is not responsible for the actual change in free energy (∆G)?
A Temperature
B Pressure
C The initial concentration of reactant and products
D pH

Answer: pH
7 What is the value of ∆G, when a system is in equilibrium?
A ∆G = 0
B ∆G = 1
C ∆G = -1
D ∆G = ∆G֯

Answer: ∆G = 0
8 Which of the following equation shows the relationship between free energy change (∆G) and the change in entropy (∆S), under constant temperature and pressure?
A ∆G = T∆H – ∆S
B ∆G = T∆H/∆S
C ∆G = ∆H/T∆S
D ∆G = ∆H – T∆S

Answer: ∆G = ∆H – T∆S
9 Law of thermodynamics which states that energy can neither be created nor be destroyed is ___________
A The second law of thermodynamics
B Third law of thermodynamics
C First law of thermodynamics
D Zero-order kinetics

Answer: First law of thermodynamics
10 Which of the following statements is false?
A The reaction tends to go in the forward direction if ∆G is large and positive
B The reaction tends to move in the backward direction if ∆G is large and negative
C The system is at equilibrium if ∆G = 0
D The reaction tends to move in the backward direction if ∆G is large and positive

Answer: The reaction tends to move in the backward direction if ∆G is large and positive
11 What is the relationship between ∆G and ∆G‘°?
A ∆G = ∆G‘° + RTln([products]/[reactants])
B ∆G = ∆G‘° – RTln([products]/[reactants])
C ∆G = ∆G‘° + RTln([reactants]/[products])
D ∆G = ∆G‘° – RTln([reactants]/[products])

Answer: ∆G = ∆G‘° + RTln([products]/[reactants])
12 If ∆G‘° of the reaction A → B is -40kJ/mol under standard conditions then the reaction
A Will never reach equilibrium
B Will not occur spontaneously
C Will proceed at a rapid rate
D Will proceed from left to right spontaneously

Answer: Will proceed from left to right spontaneously
13 What does first law of thermodynamics state?
A Energy can neither be destroyed nor created
B Energy cannot be 100 percent efficiently transformed from one type to another
C All living organisms are composed of cells
D Input of heat energy increases the rate of movement of atoms and molecules

Answer: Energy can neither be destroyed nor created
14 The relationship between K‘eq and ∆G‘° is
A ∆G‘° = RTlnK‘eq
B ∆G‘° = -RTK‘eq
C ∆G‘° = RK‘eq
D ∆G‘° = -RK‘eq

Answer: ∆G‘° = -RTK‘eq
15 The study of energy relationships and conversions in biological systems is called as
A Biophysics
B Biotechnology
C Bioenergetics
D Microbiology

Answer: Bioenergetics
16 Unfolding of regular secondary protein structure causes
A Large decrease in the entropy of the protein
B Little increase in the entropy of protein
C No change in the entropy of the protein
D Large increase in the entropy of the protein

Answer: Large increase in the entropy of the protein
17 For a reaction if ∆G° is positive, then
A The products will be favored
B The reactants will be favored
C The concentration of the reactants and products will be equal
D All of the reactant will be converted to products

Answer: The reactants will be favored
18 ∆G° is defined as the
A Residual energy present in the reactants at equilibrium
B Residual energy present in the products at equilibrium
C Difference in the residual energy of reactants and products at equilibrium
D Energy required in converting one mole of reactants to one mole of products

Answer: Energy required in converting one mole of reactants to one mole of products
19 If enthalpy change for a reaction is zero, then ∆G° equals to
A -T∆S°
B T∆S°
C -∆H°
D lnkeq

Answer: -T∆S°
20 Which of the following is a chemical link between catabolism and anabolism?
A AMP
B ADP
C ATP
D All of these

Answer: ATP

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