
BIOC212 2022 SI 2
Authored by sphesihle cyprian
Science
University
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6 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
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
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
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
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A chemical reaction that has a positive ∆G is correctly described as
endergonic
endothermic
spontaneous
exothermic
Enthalpic
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
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
5.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
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.
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
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.
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