CH 6 Making Life Work: Capturing and Using Energy Flashcards Preview

Final Exam > CH 6 Making Life Work: Capturing and Using Energy > Flashcards

Flashcards in CH 6 Making Life Work: Capturing and Using Energy Deck (26):
1

What are phototrophs?

Organisms that get energy from the sun

2

What are chemotrophs?

Organisms that get their energy from chemical compounds

3

Are humans chemoheterotrophs?

Yes

4

Define catabolism

The breakdown of molecules into smaller units producing ATP

5

Define anabolism

Building of molecules from smaller units requires energy

6

Define kinetic energy?

Energy involved with movement

7

Define potential energy?

Stored energy

8

Where is the highest potential energy located in an atom?

at the outer electron shell

9

What are the three main attributes of ATP?

Stable but not too stableAbility too break down one or two bondsEasy to recharge

10

What is the first law of thermodynamics?

Energy is neither created or destroyed it simply changes from one form to another

11

What is the second law of thermodynamics?

The amount of disorder increases when energy is transformed

12

Define Gibbs free energy

The amount of energy in a system available to do work

13

Is an endergonic anabolic or catabolic?

Anabolic it requires energy

14

Is an exergonic reaction catabolic or anabolic?

Catabolic it releases energy

15

Define enthalpy?

Total amount of energy available

16

Define entropy

Degree of disorder

17

Define energy coupling

The energy used from an exergonic reaction to drive an endergonic reaction

18

What is the change in Gibbs free energy for 1mol of ATP?

-7 kcal

19

What are the 4 requirements of a cells metabolism?

A way to encode and transmit informationA membrane separating inside from outsideEnergyUniversal currency of all cells is ATP

20

Define transition state?

A brief moment in a chemical reaction when in which the chemical bonds in the reactants are broken and new bonds in the products are formed

21

What is the allosteric effect?

A change in the activity or affinity of a protein as the result of binding of a molecule to a site other than the active site

22

What is competitive inhibition?

The enzyme binds either it's substrates or it's inhibitor

23

What is non competitive inhibition? Does this cause a decrease in the rate at which enzymes converts the substrate to product?

Binding site of substrates and in biters are different Yes

24

Is an enzyme consumed in the reaction?

No

25

How the active site formed?

Protein folding brings specific amino acids close together forming the active site

26

What is a catalyst?

Substance that increase the rate of chemical reactions without themselves being consumedEnzymes