Explanation:

The citric acid cycle, likewise recognized as the Kreb"s cycle, occurs within the mitochondria of eukaryotic cells. In prokaryotic cells, it occurs in the cytosol.

You are watching: In eukaryotic cells, glycolysis occurs in


Explanation:

The citric acid cycle takes location in the mitochondrial matrix.

Glycolysis takes location in the cytosol, and the electron transfer chain involves both the intermembrane space and also the inner mitochondrial membrane.

Pyruvate from glycolysis is transported right into the mitochondrial matrix for the citric acid cycle. Energy from the citric acid cycle allows protons to be pumped to the intermembrane area. The electron carry chain requires proteins alengthy the inner mitochondrial membrane, ultimately resulting in the activation of ATP synthase because of the influx of prolots alengthy their gradient.


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Example Inquiry #1 : Understanding The Citric Acid Cycle


A sample of rats were fed glucose

*
 containing radioactive oxygen. After a couple of minutes, wright here would certainly the radioenergetic oxygen be found?


Possible Answers:

*


*


*


*



Correct answer:


Explanation:

In cellular respiration, glucose first undergoes glycolysis and is broken down into 2 pyruvate molecules. As the pyruvate passes through the citric acid cycle, three molecules of 

*
 are developed. The radioenergetic oxygen molecules would be uncovered in the 
*
.

*
 is developed once electrons rerelocated from glucose are provided to reduce 
*
*
 is developed by the phosphorylation of 
*
. The oxygen in 
*
 enters the mitochondrion as gaseous molecular oxygen from the environment, not from glucose. Finally, 
*
is diminished to water in cellular respiration and serves as a reactant, fairly than a product, in cell metabolism.


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Example Concern #1 : Understanding The Citric Acid Cycle


Wbelow does the Krebs cycle take place?


Possible Answers:

Intermembrane room of the mitochondria


In the cytosol


On the inner membrane of the mitochondria


Mitochondrial matrix


Correct answer:

Mitochondrial matrix


Explanation:

The Krebs cycle takes area in the mitochondrial matrix. The assets of glycolysis, which takes area in the cytosol, are brought to the mitochondria for the Krebs cycle and electron move chain. The electron carriers created during the Krebs cycle (NADH and FADH2) are then used in the electron deliver chain, which takes area on the inner membrane of the mitochondria.


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Example Concern #51 : Cellular Respiration


Which of the following molecules is developed during the Krebs cycle?

I. FADH2

II. ATP

III. Acetyl-CoA


Possible Answers:

I only


I and also II


II and III


II only


Correct answer:

I and also II


Explanation:

A rotate of the Krebs cycle produces one ATP, three NADH, one FADH2, and 2 CO2.

Acetyl-CoA is not developed in the time of Krebs cycle. It is created from the decarboxylation of a pyruvate molecule, which occurs before the Krebs cycle can begin. Each turn of Krebs cycle is initiated by one acetyl-CoA molecule. Remember that tbelow are 2 acetyl-CoA produced from the 2 pyruvate molecules (end product of glycolysis). For eexceptionally glucose molecule, the Krebs cycle produces 2 cycles: 2 ATP, six NADH, two FADH2, and also 4 CO2.


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Example Concern #51 : Cellular Respiration


The proportion of carbons in one acetyl-CoA molecule to one glucose molecule is __________.


Possible Answers:
Correct answer:

*


Explanation:

Acetyl-CoA is the molecule that enters as the primary reactant in the Krebs cycle.

During glycolysis glucose is the main reactant. Glucose has six carbons. The procedure of glycolysis converts one molecule of glucose into 2 molecules of pyruvate via three carbons each. Pyruvate then undergoes a decarboxylation reactivity prior to entering the Krebs cycle. Each pyruvate loses one carbon to develop carbon dioxide throughout this reaction, via the finish product of acetyl-CoA. Acetyl-CoA is, thus, a two-carbon chain.

The proportion of carbon in acetyl-CoA to carbon in glucose is two-to-six, or 1:3.


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Example Question #7 : Understanding The Citric Acid Cycle


Under anaerobic conditions, a eukaryotic cell will certainly not undergo the Krebs cycle. Why is this?


Possible Answers:

Lack of NAD+ and FADH+


The reactant for the Krebs cycle is oxygen


The end product for the Krebs cycle is oxygen


Lack of NADH and also FADH2


Namong the various other answers


Correct answer:

Lack of NAD+ and also FADH+


Explanation:

The duty of the Krebs cycle is to produce the intermediates NADH and also FADH2, which will serve as electron donors in the electron transfer chain (ETC). At the very same time, the ETC creates NAD+ and FADH+ as byassets. The assets can then be turned about to proceed fueling the Krebs cycle. Because the ETC will certainly not function in an anaerobic environment, neither will the Krebs cycle. The reactants will not be replenimelted, and the cycle will be unable to continue.

Oxygen is not directly associated as a reactant or product of the Krebs cycle. Oxygen is just directly provided as an electron receptor in the electron carry chain.


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Example Concern #1 : Understanding The Citric Acid Cycle


Which of the adhering to is not a product developed during the citric acid cycle?


Possible Answers:

H+


GTP


FADH2


NAD+


CO2


Correct answer:

NAD+


Explanation:

NAD+ and FADH are used as reactants in the citric acid cycle to make NADH and FADH2, which are supplied in the electron move chain to transform extra ADP right into ATP. All of the other selections are products in the citric acid cyclce. Proloads (H+) are a byproduct when NAD+ is converted to NADH. Carbon dioxide (CO2) is produced throughout carbohydprice conversions in the cycle. One GTP molecule is developed by the cycle, and has practically equivalent power to ATP.


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Example Question #51 : Cellular Respiration


Which of the complying with is an instance of an anabolic reaction?


Possible Answers:

Glucose-6-phosphate being isomerized to create fructose-6-phosphate


Citprice being converted to ketoglutarate


Acetyl CoA combining through oxaloacetate to create citrate


Glucose being converted to two pyruvate molecules


Correct answer:

Acetyl CoA combining through oxaloacetate to develop citrate


Explanation:

An anabolic reactivity is one in which bigger molecules are made from combining smaller molecules. Even without discovering the precise mechanics of the reactions given in the answer selections, we understand that we are searching for a reaction in which multiple molecules incorporate to develop a single molecule.

Out of the choices, tbelow is just one time wright here a larger molecule is made by the combination of two smaller ones: when acetyl CoA (2 carbons) and also oxaloacetate (4 carbons) come together in order to produce citrate (6 carbons).

See more: Why Does The Author Use Only Victor’S Information In This Passage?

The generation of pyruvate from glucose results in two smaller sized molecules from one larger molecule; this is a catalysis reactivity. The conversion of glucose-6-phosphate to fructose-6-phosphate is an isomerization reaction. The shift from citrate to ketoglutaprice is processed through an intermediate, however is inevitably a catalysis reactivity.


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Example Question #51 : Cellular Respiration


Which of the following processes occurs without oxygen?


Possible Answers:

Citric acid cycle


Fermentation


Krebs cycle 


Electron transfer chain


Correct answer:

Fermentation


Explanation:

Fermentation is a catabolic procedure which does not call for oxygen. In contrast, Krebs cycle (citric acid cycle) and oxidative phosphorylation (chemiosmosis and also electron transport) perform usage oxygen. Aerobic respiration is much more reliable than anaerobic respiration in developing ATP.


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