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This is an MCQ-based quiz on the topic of THERMODYNAMICS QUIZ: Laws of thermodynamics.
This set of MCQs helps you brush up on the important physics topics and prepare you to dive into skill practice and expand your knowledge.
Which law of thermodynamics states that absolute zero cannot be reached?
1st
2nd
3rd
0th
An ice cube is placed on a table and begins to melt. The following conclusion can be made.
Energy is being created by the ice cube and is being released to the air
Energy is being created by the air and table and making the cube heat up.
Energy is being transferred from the table to the ice cube.
Energy is being absorbed by the table which causes the cube to melt.
A gas is heated by supplying it with 250 kJ of energy; at the same time, it is compressed so that 500 kJ of work is done on the gas. Calculate the change in the internal energy of the gas.
250
750
-250
500
How many laws of thermodynamics are there?
5
4
3
2
Which of the following statements describes enzyme cooperativity?
Several substrate molecules can be catalysed by the same enzyme.
A substrate binds to an active site and inhibits cooperation between enzymes in a pathway.
A substrate molecule bound to an active site affects the active site of several subunits.
A product of a pathway serves as a competitive inhibitor of an early enzyme in the pathway.
Which of the following statements is (are) true about enzyme-catalysed reactions?
The reaction always goes in the direction toward chemical equilibrium.
The reaction is faster than the same reaction in the absence of the enzyme.
The free energy change of the reaction is opposite from the reaction in the absence of the
A and B only
What term is used to describe the transfer of free energy from catabolic pathways to anabolic pathways?
Energy coupling
Cooperativity
Feedback regulation
Entropy
Which of the following is true of enzymes?
Enzyme function is independent of physical and chemical environmental factors such as pH
Enzymes increase the rate of chemical reaction by lowering activation energy barriers.
Enzymes may require a nonprotein cofactor or ion for catalysis to take speed up more
Enzyme function is increased if the three-dimensional structure or conformation of an
