BIOLOGY 2A03 Lecture Notes - Lecture 2: Reaction Rate, Chemical Equilibrium, Hydrolysis

9 views4 pages

jadelizard655

4 May 2020

School

Department

Course

Professor

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

Document Summary

Energy: energy exists as kinetic energy, potential energy, or both. Enzyme kinetics: reaction rate depends on the following, concentration of the substrate and products, as you increase the substrate con. And the ability to form e-s complexes: enzyme activity. Inherent the catalytic rate of the protein, kcat: some evaporate faster and therefore the reaction will be influenced to be faster, enzymes con. Glucose oxidation is the central rxn of energy metabolism (4 parts: glycolysis, linking step, krebs cycle, oxidative phosphorylation and electron transport system. Glycolysis and linking step: glycolysis breaks down glucose and produces two molecules of pyruvate and occurs in the cytosol. Krebs cycle (tricarboxylic acid cycle: acetyl-coa enters the krebs cycle in the mitochondrial matrix, forms more atp and nadh & fadh2 to enter oxphos, nadh and fadh2 are the reducing equivalent bc they act as temporary electron carriers. Donate e- to oxidize to nad+ and fadh: 8 enzymes are involved in this cycle.

Related Questions

3) The hydrolysis of sucrose to glucose and fructose is exergonic. However, if you dissolve sucrose in water and keep the solution overnight at room temperature, there is no detectable conversion to glucose and fructose. Why?

Select one:

a. The change in free energy of the reaction is negative.

b. The activation energy of the reaction is high.

c. The free energy of the products is higher than the free energy of the reactants.

d. This is a condensation reaction.

e. The change in free energy of the reaction is positive.

5) Competitive inhibition differs from non-competitive inhibition in that the ___1___ site is where we see competitive inhibition, while the non-competitive inhibitor __2___.

1. a. allosteric b. non-active c. active d. hydrophillic e. hydrophobic

2.
a. binds to the active site, thus blocking it
b. binds outside the active site, changing the shape of the enzyme
c. binds outside the active site, and blocks the active site

6) Phosphofructokinase is an enzyme, and as such it __1___ of the reaction. It is part of glycolysis, and is an example of an enzyme controlled by inhibition, as high levels of citrate (an intermediate further down the catabolic pathway) turns the enzyme off
(1)Select one:
a. lowers activation energy
b. lowers the ÎG
c. raises the Free Energy
(2)Select one
a. non-competitivenegative feedback
b. irreversible competitivereversible competitive.

15)The reactions in the pathways of glycolysis and the citric acid cycle harvest the high-energy electrons stored in glucose. Therefore, these pathways _______________.

Select one:

a. take place in animal cells, but not in plant cells
b. are catabolic pathways
c. are anabolic pathways
d. involve the reduction of glucose and its metabolic intermediates

21) In an exergonic chemical reaction, the products have less free energy than the reactants (-ÎG). Endergonic reactions require an input of energy (+ÎG). The addition of starting materials and the removal of end products prevent metabolism from reaching final equilibrium. Instead, the cell exists in a state of dynamic equilibrium.

Select one:
True
False

greyferret515

BIOLOGY 2A03 Lecture Notes - Lecture 2: Reaction Rate, Chemical Equilibrium, Hydrolysis

Document Summary

Get access

Related Documents

BIOLOGY 2A03 Lecture Notes - Lecture 1: Oxidative Phosphorylation, Chemical Energy, Chemical Equilibrium

BIOLOGY 2A03 Chapter Notes - Chapter 3: Oxidative Phosphorylation, Covalent Bond, Reaction Rate

BIOLOGY 2A03 Lecture Notes - Lecture 2: Radiant Energy, Oxidative Phosphorylation, Activation Energy

Related Questions