Chapter 6 Flashcards
What are the net end products of glycolysis?
2 ATP, 2NADH, 6 precursor metabolites
In ___ cells break down glucose via glycolysis and then use pyruvate or derivative as final electron acceptor
fermentation
what kind of energy released when bond is broken that is available to do work?
free energy
Oxidative phosphorylation, the mechanism by which cellular res. use the NADH and FADH2 generated in glycolysis, tranisitional step, TCAto synthesize ATP involve what two steps?
The electron transport chain generate PMF.
ATP synthase use the energy of PMF to drive synthesis of ATP
What happens during transitional step?
Electrons are transfered to NAD+ to make NADH and H+.
CO2 is removed from pyruvate.
2-C acetyl group join to coenzyme A to create acetyl-CoA
Which of these describe pentose phosphate pathway?
a. It yield reducing power in the form of NADPH
b. Its primary role is the production of compound use in biosynthesis
c. It breaks down glucose
d. it produces many different precursor metabolites
e. the final product of glycolysis feeds into pentose phosphate pathway.
a b c
Show the arrangement of electron carriers in bacteria ETC to helps explain how protons are shuttled from one side of membrane to the other.
1 Electron carrier donates electron to hydrogen carrier
2 Hydrogen carrier must pick up proton from inside the cell
3 Hydrogen carriers pass electrons to a carrier that only accept electron
4 Electron carriers only accept electrons, thus pump protons to the outside of cell
5 PMF is set up to as protons are moved from the inside the cell to the outside
Consider the two processes for converting glucose to CO2 and water. In the first, the glucose is burned, the second, the glucose is converted in a series of multiple steps in a cell. Which is correctly describe the free energy in these two approaches?
a. The change in free energy is the same regardless
b. the change in free energy is greater in the first reaction, since the glucose is directly convert to CO2 and water.
c. the change in free energy is greater in the second reaction, since the glucose is carefully converted to CO2 and water
a
Which describe an exergonic reaction?
a. The starting compounds have more free energy than the products
b. The products have more free energy than the starting compounds
c. The reaction release energy as it proceed
d. The reaction requires an input of energy in order to proceed
a and c
Metabolic pathways can be linear, _____, and _____
branched, cyclical
What are the end products after two turn of TCA?
6 NADH, 2 FADH2, 2 ATP, 2 precursor metabolites
