BSC2010 EXAM PRACTICE 500 QUESTIONS &
CORRECT ANSWERS LATEST 2026/2027
Energy cannot be created or destroyed.
Some energy is lost as disorder (entropy) increases.
The Laws of Thermodynamics
lost, increases
Energy is ____ as entropy _________.
spontaneously
Disorder happens _____________
energy
Organization requires _____
B. When energy is transferred from one form into another, some energy is lost as
entropy
C. Entropy is a form of energy that is not usable
D. Energy can be transformed from one form into another
Which of these statements are true according to the laws of thermodynamics?
A. Energy can be destroyed
B. When energy is transferred from one form into another, some energy is lost as
entropy
C. Entropy is a form of energy that is not usable
D. Energy can be transformed from one form into another
E. Energy can be created
B. Energy is transferred from one molecule into the other
D. Some energy is lost as entropy during the transfer
According to the laws of thermodynamics, which of these statements are true?
Select two (2):
,A. 100% of the energy in the first molecule goes to the second molecule
B. Energy is transferred from one molecule into the other
C. All the energy is created anew
D. Some energy is lost as entropy during the transfer
D. Microorganisms will convert the sugars into CO2 and use some of the energy
released in the process
Based on the laws of thermodynamics, what happens when you leave a banana to
rot?
A. Microorganisms will convert the carbon in the banana to energy and heat
B. Some of the mass in the banana will be used by microorganisms, some mass
will turn into heat
C. Living organisms can use all of the energy in the banana, there will be no
energy lost
D. Microorganisms will convert the sugars into CO2 and use some of the energy
released in the process
E. Microorganisms will convert the mass of the banana into energy that they use to
grow
oxidized
The molecule that loses an electron is ________
reduced
The molecule that gains an electron is _______
True
True or false: Oxidation and reduction always take place together
B. Glucose is losing electrons
Cellular respiration if the process of oxidizing glucose into CO2 and water. Based
on this, you can assume that...
A. There is no net change in electrons in glucose
B. Glucose is losing electrons
C. Glucose is gaining electrons
enthalpy
energy contained in the chemical bonds
,exergonic
If the reaction releases energy, it is _________
(hint: the reactants have more energy than the products)
endergonic
If the reaction requires energy input, it is __________
(hint: the products have more energy than the reactants)
E. The reaction requires energy input
For a reaction in which the products contain more energy than the reactants, which
of the following is true?
A. The reaction has a negative delta G
B. The reaction is called exergonic
C. The reaction occurs spontaneously
D. There is a negative change in free energy
E. The reaction requires energy input
D. It involves a decrease in free energy
Cellular respiration is the process of breaking down glucose into carbon dioxide
and water. Glucose (the reactanct) has more energy than water and carbon dioxide
(the products). What can you infer about cellular respiration?
A. It involves an increase in free energy
B. It occurs instantly
C. It is an endergonic process
D. It involves a decrease in free energy
E. It requires energy input
F. It involves an increase in free energy
Photosynthesis is the process of using carbon dioxide and water to form glucose.
Glucose (the product) has more energy than water and carbon dioxide (the
reactants). What can you infer about photosynthesis? Select two (2):
A. It is an exergonic process
B. It involves a decrease in free energy
C. It releases energy
D. It occurs spontaneously
E. It requires energy input
F. It involves an increase in free energy
, C. ATP (Adenosine triphosphate)
Which form of adenosine has the most energy?
A. AMP (Adenosine monophosphate)
B. ADP (Adenosine diphosphate)
C. ATP (Adenosine triphosphate)
A. Couple them with exergonic reactions
How do cells perform endergonic reactions?
A. Couple them with exergonic reactions
B. Cells cannot perform endergonic reactions
C. Obtain the energy from the products
D. Those occur spontaneously
C. They provide energy for the reaction to occur
Which of the following statements about enzymes is FALSE?
A. Their activity varies with pH & temperature
B. The speed of the reaction increases with both enzyme and substrate
concentraion
C. They provide energy for the reaction to occur
D. They reduce the activation energy of a reaction
E. They can be reused multiple times
D. Increase product concentration
Which of the following will NOT increase enzymatic activity?
A. Gradually increase the temperature
B. Increase enzyme concentration
C. Increase substrate concentration
D. Increase product concentration
A. A compound that binds to the allosteric site and prevents substrate binding
You are designing a new antibiotic that will inhibit an enzyme in a critical pathway
of pathogenic bacteria. You found a few candidate compounds that interact with
the enzyme. Which one of the following is the best candidate to do further
CORRECT ANSWERS LATEST 2026/2027
Energy cannot be created or destroyed.
Some energy is lost as disorder (entropy) increases.
The Laws of Thermodynamics
lost, increases
Energy is ____ as entropy _________.
spontaneously
Disorder happens _____________
energy
Organization requires _____
B. When energy is transferred from one form into another, some energy is lost as
entropy
C. Entropy is a form of energy that is not usable
D. Energy can be transformed from one form into another
Which of these statements are true according to the laws of thermodynamics?
A. Energy can be destroyed
B. When energy is transferred from one form into another, some energy is lost as
entropy
C. Entropy is a form of energy that is not usable
D. Energy can be transformed from one form into another
E. Energy can be created
B. Energy is transferred from one molecule into the other
D. Some energy is lost as entropy during the transfer
According to the laws of thermodynamics, which of these statements are true?
Select two (2):
,A. 100% of the energy in the first molecule goes to the second molecule
B. Energy is transferred from one molecule into the other
C. All the energy is created anew
D. Some energy is lost as entropy during the transfer
D. Microorganisms will convert the sugars into CO2 and use some of the energy
released in the process
Based on the laws of thermodynamics, what happens when you leave a banana to
rot?
A. Microorganisms will convert the carbon in the banana to energy and heat
B. Some of the mass in the banana will be used by microorganisms, some mass
will turn into heat
C. Living organisms can use all of the energy in the banana, there will be no
energy lost
D. Microorganisms will convert the sugars into CO2 and use some of the energy
released in the process
E. Microorganisms will convert the mass of the banana into energy that they use to
grow
oxidized
The molecule that loses an electron is ________
reduced
The molecule that gains an electron is _______
True
True or false: Oxidation and reduction always take place together
B. Glucose is losing electrons
Cellular respiration if the process of oxidizing glucose into CO2 and water. Based
on this, you can assume that...
A. There is no net change in electrons in glucose
B. Glucose is losing electrons
C. Glucose is gaining electrons
enthalpy
energy contained in the chemical bonds
,exergonic
If the reaction releases energy, it is _________
(hint: the reactants have more energy than the products)
endergonic
If the reaction requires energy input, it is __________
(hint: the products have more energy than the reactants)
E. The reaction requires energy input
For a reaction in which the products contain more energy than the reactants, which
of the following is true?
A. The reaction has a negative delta G
B. The reaction is called exergonic
C. The reaction occurs spontaneously
D. There is a negative change in free energy
E. The reaction requires energy input
D. It involves a decrease in free energy
Cellular respiration is the process of breaking down glucose into carbon dioxide
and water. Glucose (the reactanct) has more energy than water and carbon dioxide
(the products). What can you infer about cellular respiration?
A. It involves an increase in free energy
B. It occurs instantly
C. It is an endergonic process
D. It involves a decrease in free energy
E. It requires energy input
F. It involves an increase in free energy
Photosynthesis is the process of using carbon dioxide and water to form glucose.
Glucose (the product) has more energy than water and carbon dioxide (the
reactants). What can you infer about photosynthesis? Select two (2):
A. It is an exergonic process
B. It involves a decrease in free energy
C. It releases energy
D. It occurs spontaneously
E. It requires energy input
F. It involves an increase in free energy
, C. ATP (Adenosine triphosphate)
Which form of adenosine has the most energy?
A. AMP (Adenosine monophosphate)
B. ADP (Adenosine diphosphate)
C. ATP (Adenosine triphosphate)
A. Couple them with exergonic reactions
How do cells perform endergonic reactions?
A. Couple them with exergonic reactions
B. Cells cannot perform endergonic reactions
C. Obtain the energy from the products
D. Those occur spontaneously
C. They provide energy for the reaction to occur
Which of the following statements about enzymes is FALSE?
A. Their activity varies with pH & temperature
B. The speed of the reaction increases with both enzyme and substrate
concentraion
C. They provide energy for the reaction to occur
D. They reduce the activation energy of a reaction
E. They can be reused multiple times
D. Increase product concentration
Which of the following will NOT increase enzymatic activity?
A. Gradually increase the temperature
B. Increase enzyme concentration
C. Increase substrate concentration
D. Increase product concentration
A. A compound that binds to the allosteric site and prevents substrate binding
You are designing a new antibiotic that will inhibit an enzyme in a critical pathway
of pathogenic bacteria. You found a few candidate compounds that interact with
the enzyme. Which one of the following is the best candidate to do further
