BIOA01H3 Chapter Notes - Chapter 4: Adenosine Monophosphate, Equilibrium Point, Enzyme Inhibitor

14 views7 pages

scarlettiger519

23 Sep 2016

School

Department

Course

Professor

For unlimited access to Textbook Notes, a Class+ subscription is required.

3363410481 and 37710 others unlocked

BIOA01H3 Full Course Notes

Verified Note

18 documents

Document Summary

It is detected through its ability to do work, such as ability to move objects against opposing forces (gravity, friction, pressure), therefore energy is defined by its capacity to do work. Energy exists in many different forms such as heat, chemical, electrical, and mechanical. Although the forms of energy may be different, they are able to transfer from one form to another. E. g. chemical energy in a flashlight battery is converted to electrical energy that passes through the flashlight bulb. All forms of energy can be categorized into 2 different groups: kinetic energy: the energy possessed by an object due to its motion. Another form of potential energy is called chemical potential energy, which is the potential energy stored in specialized structure and arrangements of atoms. 4. 1b-the laws of thermodynamics describe the energy flow in natural systems. Thermodynamics is the study of energy and its transformations.

Related Questions

As entropy increases there will be more useful energy to doâworkâ. True or false?

False. As entropy increases, there will generally be less usefulenergy to do work. We can think of entropy as usually being presentin the form of heat energy. Imagine a car motor, which attempts toturn chemical potential energy into kinetic energy (movement). Lessefficient motors will get hotter for the same amount of fuelconsumed. When you drive a car you hope that most of the fuelenergy is converted into kinetic energy and not lost as heat(entropy). The hotter the car (and thus the more entropy) the lessefficient the ability to do âworkâ (the moving of the vehicle).

True. As entropy increases, there will generally be more usefulenergy to do work. We can think of entropy as usually being presentin the form of heat energy. In most biological and mechanicalsystems it is heat energy which is captured to do useful 'work'.Heat energy, the random movement of molecules, and increases inentropy are central to doing useful work.

Biological systems sometimes appear on the surface to break theSecond Law of Thermodynamics â by seemingly increasing the order inthe overall system. They donât. Why?

a. Earth (and living things on it) are not a closed system. Thesun's constant input of energy in the form of photons is harnessedby living things to create internal order within themselves. Butwithout such a constant input of energy, most biological systems onearth would break down.

b. The Second Law tells us that no natural process can occurunless it is also associated with an increase in the entropy of theuniverse. A living organism (such as an animal or plant) brings inmatter and energy from its environment and uses this to creategreater order within its body: the processes of life. But it isimportant to keep in mind that all animals and plants are also partof a larger system of the environment around them. While creating asmall âpocketâ of order, the processes of life (metabolism,movement, etc..) releases heat into the environment â thusincreasing the entropy of the universe and following the2^nd law.

c. Living things, by harnessing energy to create order (withinand around themselves) actually create a paradox in questionssurrounding the first and second laws of thermodynamics andseemingly violate many previously held assumptions.

d. Both a and b above are correct.

When plants capture energy in the photons of sunlight andconvert that energy into the chemical bonds of organic molecules,are they creating new energy?

No, the energy is being transferred from one form into another.But no new energy is being created.

No, the overall total energy is decreasing over time.

Yes, by capturing photons, the plants are creating newenergy.

Yes, by capturing photons, the plants are creating new energy -of a different wavelength.

ceruleanhamster867

BIOA01H3 Chapter Notes - Chapter 4: Adenosine Monophosphate, Equilibrium Point, Enzyme Inhibitor

BIOA01H3 Full Course Notes

Document Summary

Get access

Related Documents

BIOA01H3 Chapter Notes - Chapter 4: Electromagnetic Radiation, Kinetic Energy, Thermodynamics

BIOA01H3 Lecture Notes - Lecture 8: Enzyme Inhibitor, Catalytic Cycle, Isoleucine

BIOA01H3 Lecture Notes - Lecture 3: Dynein, Occludin, Centrosome

Related Questions