BIO 2600 CH. 14 QUESTIONS WITH COMPLETE ANSWERS { GRADED A+}
1 view 0 purchase
Course
BIO 2600
Institution
BIO 2600
BIO 2600 CH. 14 QUESTIONS WITH
COMPLETE ANSWERS { GRADED A+}
The link between bond-forming reactions and membrane transport processes in the
mitochondria is called __________________.
Choice (a) is correct. Choices (b), (c), and (d) are individual parts of the overall
process of chemiosmot...
The link between bond-forming reactions and membrane transport processes in the
mitochondria is called __________________.✔✔
Choice (a) is correct. Choices (b), (c), and (d) are individual parts of the overall
process of chemiosmotic coupling.
(a) chemiosmotic coupling.
(b) proton pumping.
(c) electron transfer.
(d) ATP synthesis.
Describe how a standard flashlight battery can convert energy into useful work and
explain how this is similar to the energy conversions in the mitochondria.
,- ✔✔A battery contains chemicals that generate negatively charged ions at one
pole, and it is able to cause the continuous transfer of electrons along a metal wire
if that pole is connected to the other end of the battery. The energy released by the
electron-transfer process driven by the battery can be harnessed to do useful work,
as when it is used to run an electric motor. Likewise, the energy released by the
electron transfers that occur between the protein complexes in the electron-
transport chain does useful work when it drives the movement of protons to one
side of the membrane, since the resulting proton gradient is then used to generate
chemical energy in the form of ATP
Based upon what you know about metabolism, explain how electrons are stripped
from food molecules and used to drive the electron-transport chain. ✔✔
Food molecules are ultimately converted into acetyl CoA,. Electrons removed
during the generation of acetyl CoA are added to the cofactors NAD+ and FAD to
generate the reduced cofactors NADH and FADH2, respectively. The two carbon
atoms in the acetyl group of acetyl CoA are then fed into the citric acid cycle,
where they are oxidized to two molecules of CO2. The electrons removed during
this oxidation are also captured by the activated carriers NADH and FADH2. The
high-energy electrons in all of these activated carriers, which derived from carbons
,that were formerly part of food molecules are now transferred to the proteins in the
electron-transport chain.
Which of the following is not part of the process known as oxidative
phosphorylation?
- ✔✔ (d) During glycolysis, ATP generation occurs simultaneously with two of
the key reactions that convert glucose to pyruvate in the cytosol. This production
of ATP in the absence of oxygen is not part of oxidative phosphorylation; it is
referred to as substrate-level phosphorylation.
(a) Molecular oxygen serves as a final electron acceptor.
(b) FADH2 and NADH become oxidized as they transfer a pair of electrons to the
electron-transport chain.
(c) The electron carriers in the electron-transport chain toggle between reduced and
oxidized states as electrons are passed along.
(d) ATP molecules are produced in the cytosol as glucose is converted into
pyruvate.
, (a) - ✔✔Which of the following statements describes the phosphorylation event
that occurs during the process known as oxidative phosphorylation?
(a) A phosphate group is added to ADP.
(b) ATP is hydrolyzed in order to add phosphate groups to protein substrates.
(c) A phosphate group is added to molecular oxygen.
(d) Inorganic phosphate is transported into the mitochondrial matrix, increasing the
local phosphate concentration.
Choice (a) is correct. Glycolysis of a single glucose molecule generates 2 ATP
molecules. Oxidative phosphorylation in the mitochondria generates an additional
28 ATP molecules, making a total of 30 ATP molecules for each glucose molecule.
- ✔✔Modern eukaryotes depend on mitochondria to generate most of the cell's
ATP. How many molecules of ATP can a single molecule of glucose generate?
(a) 30
(b) 2
(c) 20
(d) 36
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller morren. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
