exam 3 bio review

exam 3 bio review - Exam 3 Part 1 Bioenergetics and Cell...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Exam 3 Part 1 Bioenergetics and Cell Respiration 1. Explain how energy changes are related to changes in matter: : because energy the energy needed for life must be obtain from the environmental energy sources and transformed into a usable form . 2. What type of energy is heat : kinetic energy What type of energy is stored in chemical bonds: potential energy What type of is stored as a concentration gradient: potential energy 3. State the First law of thermodynamics : energy is neither created nor destroyed. Energy can be converted from one form to another. Second Law of Thermodynamics : not all energy can be used , when enegy is converted from one form to another , some is unusable. their relationships to an example of work. 4. What is free energy : the unusable energy that can do work. Plot free energy versus the course of an exergonic reaction. Exergnonic reation = free molecule + free energy 5. Explain the equation: G = H - T S Free enegy = total enegy – the change in temperature time entropy. Δ H—total energy added ( Δ H > 0) or released ( Δ H < 0). Δ S—change in entropy. Large changes in entropy make Δ G more negative 6. What does it mean if G is negative: free energy is released . 7. How does life become ordered and overcome entropy - the fact that as a result of energy conversions, disorder tends to increase: because life acquire enegy from the sun and all chemical changes , physical changes and biological process tend to increase entrophy 8. Distinguish between exergonic and endergonic reactions. Exergonic : reaction the release free energy (catabolic reaction may break down an ordered reactant sush as a protein molecules into
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/30/2008 for the course BIO 1305 taught by Professor Eldridge during the Spring '08 term at Baylor.

Page1 / 3

exam 3 bio review - Exam 3 Part 1 Bioenergetics and Cell...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online