BIOC212 2022 SI 2

Which of the following statements is false about anabolic pathways?

• They combine molecules into more energy-rich molecules

• They are usually coupled with catabolic pathways from which they receive energy in the form of ATP

• They are always endergonic.

• They proceed spontaneously.

• They build up complex molecules such as protein from simpler compounds

Which of the following best describes enthalpy (H)?

• the total kinetic energy of a system

• the heat content of a chemical system

• the system's entropy

• the cell's energy equilibrium

• the condition of a cell that is not able to react

A chemical reaction that has a positive ∆G is correctly described as

• endergonic

• endothermic

• spontaneous

• exothermic

• Enthalpic

Which of the following is true for all exergonic reaction?

• The products have more total energy than the reactants

• The reaction proceeds with a net release of free energy

• The reaction goes only in a forward direction: all reactants will be converted to products, but no products will be converted to reactant

• A net input of energy from the surroundings is required for the reactions to proceed

• The reactions are rapid

Which of the following statements is a logical consequence of the second law of thermodynamics?

• If the entropy of a system increases, there must be a corresponding decrease in the entropy of the universe.

• If there is an increase in the energy of a system, there must be a corresponding decrease in the energy of the rest of the universe.

• Every energy transfer requires activation energy from the environment.

• Every chemical reaction must increase the total entropy of the universe.

• Energy can be transferred or transformed, but it cannot be created or destroyed.

Which of the following is a statement of the first law of thermodynamics?

• Energy cannot be created or destroyed.

• The entropy of the universe is decreasing.

• The entropy of the universe is constant.

• Kinetic energy is stored energy that results from the specific arrangement of matter.

• Energy cannot be transferred or transformed.