Class Notes (836,580)
Canada (509,856)
Biology (6,816)
Lecture

Bioenergetics, Enzymes and ATP Notes.docx

5 Pages
169 Views
Unlock Document

Department
Biology
Course
Biology 1202B
Professor
Richard Gardiner
Semester
Winter

Description
Bioenergetics, Enzymes & ATP Bioenergetics  The study of energy in living systems (environments) and the organisms (plants and animals) that utilize it Potential Energy  Energy that matter occupies because of its location, arrangement, or position --> energy of position  o Water behind a dam o Chemical energy (gas) Kinetic Energy  Energy in the process of doing work --> energy of motion  o Heat o Light energy  Three systems…  o Isolated system - does not exchange matter or energy with its surroundings o  Thermos bottom o Closed system - exchanges energy with its surroundings o  Planet Earth o Open system - exchanges both energy and mater with its surroundings o  Ecosystem, cell, plant, animals First Law of Thermodynamics  Energy cannot be created or destroyed but only converted to other forms  This means that the amount of energy in the universe is constant Second Law of Thermodynamics  All energy transformation are inefficient because every reaction results in an increase in entropy and the loss of usable energy as heat  o Entropy - the amount of disorder in a system Biological Work…Why?  Biosynthesis  o Nucleotides -> DNA/RNA o Amino acids -> Proteins o CO2+H2O -> CHO (glucose)  Transport  o Passive (spontaneous) doe snot require energy o Active requires energy Biological Work  Free energy - the part of a system's total energy that can perform work when the temperature is uniform as in a living cell  o Represented by G o  Two components…   H (system's total energy)  S (the entropy of the system)  G=H-TS  The change in free energy in a system changing from one state to another is symbolized by dG  o dG = Gf - Gi o dG = dH - TdS o Change in free energy between reactants and products Entropy  Entropy measures energy that is longer available to perform useful work within the current environment  Can also be understood as the "quality" of heat flowing between two bodies  One of the ideas involved in the concept is that nature tends from order to disorder in isolated systems Endergonic Reactions  dG > 0  Chemical reactions that requires a net input of energy  o Photosynthesis - CO2 + H2O -> C6H
More Less

Related notes for Biology 1202B

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit