22 Questions
Which scientific law states that energy is conserved and cannot be created or destroyed?
The Law of Conservation of Energy
What is the branch of science that deals with the exchange of energy?
Thermodynamics
What is the mechanical motion of the apparatus churning the water described as?
Work
Which type of system has no exchange of matter or energy with the surroundings?
Isolated system
What is the term used to describe the specific part of the universe on which we choose to focus?
System
Which type of system can exchange energy but not matter with the surroundings?
Closed system
What is the term used to describe the part of the universe that is not the system?
Surroundings
According to the text, what is the combined quantity called that is conserved in the laws of mass and energy?
Mass-energy
What does the Second Law of Thermodynamics deal with?
The flow of energy
What does the Third Law of Thermodynamics state about the entropy of systems?
Entropy decreases as temperature approaches zero Kelvin
What do the laws of thermodynamics explain in biology?
All of the above
Which technology made it possible to reproduce Robert Hooke's experiments on springs using biological molecules?
Scanning tunneling microscope
What is the purpose of tethering one end of a biological molecule to a surface and the other end to a movable object in molecular force microscopy?
To apply an external force and stretch the molecule
Which biomolecule has a comparatively simple force-extension curve?
Single-stranded DNA (ss-DNA)
What is the work done in kJ/mol in stretching a base-pair length of DNA by 70%?
10 kJ/mol
Which unit is used to measure work and energy in the Système International (SI)?
Joule (J)
What is the unit of force in the Système International (SI)?
Newton (N)
What is the formula for the force due to the gravitational attraction of the Earth on mass m?
Fex = mg
What is the standard gravity adopted by scientists?
9.80665 m/s^2
Which of the following statements is true about the relationship between external pressure and work done on the system?
If the external pressure is less than the pressure of the system, the system can expand and do work on the surroundings.
What is the relationship between external pressure (pex) and external force (Fex)?
pex = Fex * A
What is the term commonly used to describe the work associated with a change in the volume of the system?
Pressure-volume work
Test your knowledge on Molecular Force Microscopy and its applications in studying biological molecules. Learn about the technology, techniques, and experiments involved in this fascinating field.
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