FORMIDABLE_ Medical Biochemistry (MDB 203)

Which of the following laws of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another?

• Zeroth law

• First law

• Second law

• Third law

Enthalpy is a measure of:

• Disorder in a system

• Total energy of a system

• Potential energy of a system

• Heat exchange between a system and its surroundings

In a spontaneous reaction, which of the following is true?

• ∆G > 0

• ∆G < 0

• ∆G = 0

• ∆G is always positive

An exergonic reaction:

• Requires energy input

• Releases energy

• Has a positive ∆G value

• Is non-spontaneous

Which of the following statements regarding endergonic reactions is correct?

• They release energy

• They have a negative ∆G value

• They are spontaneous

• They require an input of energy

ATP hydrolysis is an example of:

• Exergonic reaction

• Isobaric reaction

• Reversible reaction

• Endergonic reaction

What is the primary role of compartmentalization in energy processes within cells?

• To increase entropy

• To separate reactants and products

• To decrease free energy

• To speed up metabolic reactions

Which organelle is primarily responsible for the compartmentalization of energy processes in eukaryotic cells?

• Nucleus

• Mitochondrion

• Golgi apparatus

• Endoplasmic reticulum

Which of the following processes is an example of energy transformation following the laws of thermodynamics?

• DNA replication

• Photosynthesis

• Muscle contraction

• All of the above

Which term refers to the transfer of energy from one molecule to another?

• Fermentation

• Substrate-level phosphorylation

• Energy coupling

• Glycolysis